/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_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:10:12,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:10:12,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:10:12,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:10:12,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:10:12,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:10:12,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:10:12,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:10:12,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:10:12,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:10:12,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:10:12,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:10:12,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:10:12,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:10:12,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:10:12,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:10:12,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:10:12,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:10:12,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:10:12,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:10:12,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:10:12,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:10:12,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:10:12,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:10:12,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:10:12,669 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:10:12,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:10:12,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:10:12,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:10:12,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:10:12,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:10:12,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:10:12,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:10:12,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:10:12,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:10:12,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:10:12,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:10:12,684 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:10:12,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:10:12,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:10:12,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:10:12,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:10:12,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:10:12,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:10:12,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:10:12,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:10:12,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:10:12,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:10:12,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:10:12,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:10:12,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:10:12,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:10:12,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:10:12,690 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:10:12,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:10:12,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:10:12,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:10:12,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:10:12,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:10:12,928 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:10:12,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-02-23 18:10:12,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41e239d2/3ab4615b4d804bcfa6e73c124cf38b92/FLAG83f6660c1 [2022-02-23 18:10:13,376 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:10:13,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2022-02-23 18:10:13,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41e239d2/3ab4615b4d804bcfa6e73c124cf38b92/FLAG83f6660c1 [2022-02-23 18:10:13,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e41e239d2/3ab4615b4d804bcfa6e73c124cf38b92 [2022-02-23 18:10:13,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:10:13,406 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:10:13,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:10:13,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:10:13,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:10:13,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0de87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13, skipping insertion in model container [2022-02-23 18:10:13,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:10:13,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:10:13,607 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_unwindbound50.c[490,503] [2022-02-23 18:10:13,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:10:13,636 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:10:13,645 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_unwindbound50.c[490,503] [2022-02-23 18:10:13,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:10:13,665 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:10:13,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13 WrapperNode [2022-02-23 18:10:13,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:10:13,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:10:13,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:10:13,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:10:13,677 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:10:13,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:10:13,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:10:13,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:10:13,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:10:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:13,732 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 18:10:13,734 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 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:10:13,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:10:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:10:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:10:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:10:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:10:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:10:13,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:10:13,809 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:10:13,810 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:10:13,933 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:10:13,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:10:13,938 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:10:13,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:13 BoogieIcfgContainer [2022-02-23 18:10:13,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:10:13,941 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:10:13,941 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:10:13,942 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:10:13,946 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:13" (1/1) ... [2022-02-23 18:10:13,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:10:13 BasicIcfg [2022-02-23 18:10:13,975 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:10:13,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:10:13,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:10:13,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:10:13,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:10:13" (1/4) ... [2022-02-23 18:10:14,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1773dc11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:14, skipping insertion in model container [2022-02-23 18:10:14,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:10:13" (2/4) ... [2022-02-23 18:10:14,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1773dc11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:10:14, skipping insertion in model container [2022-02-23 18:10:14,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:10:13" (3/4) ... [2022-02-23 18:10:14,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1773dc11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:10:14, skipping insertion in model container [2022-02-23 18:10:14,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:10:13" (4/4) ... [2022-02-23 18:10:14,007 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.cJordan [2022-02-23 18:10:14,011 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:10:14,011 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:10:14,058 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:10:14,064 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 18:10:14,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:10:14,079 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 18:10:14,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-23 18:10:14,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:14,086 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 18:10:14,086 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:14,091 INFO L85 PathProgramCache]: Analyzing trace with hash 6304412, now seen corresponding path program 1 times [2022-02-23 18:10:14,100 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:14,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341768205] [2022-02-23 18:10:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:14,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:10:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:10:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:14,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-23 18:10:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:14,329 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 18:10:14,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:14,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341768205] [2022-02-23 18:10:14,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341768205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:14,330 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:14,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:10:14,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505013344] [2022-02-23 18:10:14,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:14,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:10:14,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:10:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:10:14,371 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 18:10:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:14,479 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-23 18:10:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:10:14,481 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 18:10:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:14,488 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:10:14,488 INFO L226 Difference]: Without dead ends: 36 [2022-02-23 18:10:14,490 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 18:10:14,495 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 18:10:14,497 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 18:10:14,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-23 18:10:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-23 18:10:14,528 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 18:10:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-02-23 18:10:14,531 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-02-23 18:10:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:14,532 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-02-23 18:10:14,532 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 18:10:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-02-23 18:10:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 18:10:14,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:14,536 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 18:10:14,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:10:14,536 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:14,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1535904754, now seen corresponding path program 1 times [2022-02-23 18:10:14,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:14,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731612583] [2022-02-23 18:10:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:14,570 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:14,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884664130] [2022-02-23 18:10:14,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:14,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:14,573 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 18:10:14,574 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 18:10:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:14,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:10:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:14,763 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 18:10:14,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:14,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:14,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731612583] [2022-02-23 18:10:14,764 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:14,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884664130] [2022-02-23 18:10:14,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884664130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:14,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:14,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 18:10:14,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072293736] [2022-02-23 18:10:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:14,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 18:10:14,772 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 18:10:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 18:10:14,773 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 18:10:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:14,796 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2022-02-23 18:10:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 18:10:14,797 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 18:10:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:14,800 INFO L225 Difference]: With dead ends: 37 [2022-02-23 18:10:14,801 INFO L226 Difference]: Without dead ends: 37 [2022-02-23 18:10:14,801 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 18:10:14,802 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 18:10:14,803 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 18:10:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-23 18:10:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-23 18:10:14,807 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 18:10:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-02-23 18:10:14,808 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-02-23 18:10:14,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:14,810 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-02-23 18:10:14,810 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 18:10:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-02-23 18:10:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 18:10:14,811 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:14,811 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 18:10:14,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 18:10:15,027 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 18:10:15,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 401530880, now seen corresponding path program 1 times [2022-02-23 18:10:15,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:15,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274530160] [2022-02-23 18:10:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:15,041 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:15,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649595152] [2022-02-23 18:10:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:15,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:15,043 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 18:10:15,083 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 18:10:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:15,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:10:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:15,233 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 18:10:15,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:15,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:15,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274530160] [2022-02-23 18:10:15,234 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:15,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649595152] [2022-02-23 18:10:15,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649595152] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:15,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:15,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:10:15,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366044646] [2022-02-23 18:10:15,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:15,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:10:15,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:15,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:10:15,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:10:15,236 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 18:10:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:15,311 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2022-02-23 18:10:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:15,312 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 18:10:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:15,316 INFO L225 Difference]: With dead ends: 50 [2022-02-23 18:10:15,316 INFO L226 Difference]: Without dead ends: 50 [2022-02-23 18:10:15,317 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 18:10:15,319 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 18:10:15,321 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 18:10:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-23 18:10:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2022-02-23 18:10:15,330 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 18:10:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-02-23 18:10:15,331 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2022-02-23 18:10:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:15,331 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-02-23 18:10:15,331 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 18:10:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-02-23 18:10:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 18:10:15,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:15,332 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 18:10:15,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-02-23 18:10:15,549 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 18:10:15,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:15,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:15,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2110136122, now seen corresponding path program 1 times [2022-02-23 18:10:15,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:15,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124816873] [2022-02-23 18:10:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:15,565 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:15,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901964081] [2022-02-23 18:10:15,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:15,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:15,566 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 18:10:15,568 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 18:10:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:10:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:15,680 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 18:10:15,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:15,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:15,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124816873] [2022-02-23 18:10:15,681 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:15,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901964081] [2022-02-23 18:10:15,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901964081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:15,681 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:15,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:15,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772190880] [2022-02-23 18:10:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:15,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:15,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:15,683 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 18:10:15,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:15,702 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-02-23 18:10:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:10:15,702 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 18:10:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:15,703 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:10:15,703 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 18:10:15,703 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 18:10:15,704 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 18:10:15,705 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 18:10:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 18:10:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-23 18:10:15,715 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 18:10:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-02-23 18:10:15,716 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 29 [2022-02-23 18:10:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:15,717 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-02-23 18:10:15,717 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 18:10:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-02-23 18:10:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 18:10:15,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:15,718 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 18:10:15,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:15,931 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 18:10:15,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:15,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash -358604865, now seen corresponding path program 1 times [2022-02-23 18:10:15,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:15,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196307967] [2022-02-23 18:10:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:15,950 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:15,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935467910] [2022-02-23 18:10:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:15,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:15,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:15,952 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 18:10:15,953 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 18:10:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:16,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:10:16,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:16,293 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 18:10:16,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:16,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:16,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196307967] [2022-02-23 18:10:16,294 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:16,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935467910] [2022-02-23 18:10:16,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935467910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:16,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:16,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 18:10:16,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047089971] [2022-02-23 18:10:16,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:16,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:10:16,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:16,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:10:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:10:16,296 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 18:10:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:16,483 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2022-02-23 18:10:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:10:16,483 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 18:10:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:16,484 INFO L225 Difference]: With dead ends: 66 [2022-02-23 18:10:16,484 INFO L226 Difference]: Without dead ends: 66 [2022-02-23 18:10:16,484 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 18:10:16,485 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 18:10:16,485 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 18:10:16,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-23 18:10:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2022-02-23 18:10:16,490 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 18:10:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-02-23 18:10:16,491 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-02-23 18:10:16,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:16,492 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-02-23 18:10:16,492 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 18:10:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-02-23 18:10:16,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 18:10:16,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:16,493 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 18:10:16,517 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 18:10:16,707 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 18:10:16,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2061673945, now seen corresponding path program 1 times [2022-02-23 18:10:16,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:16,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581076330] [2022-02-23 18:10:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:16,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:16,720 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:16,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102772975] [2022-02-23 18:10:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:16,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:16,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:16,722 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 18:10:16,724 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 18:10:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:16,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:10:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:16,854 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 18:10:16,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:16,944 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 18:10:16,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:16,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581076330] [2022-02-23 18:10:16,944 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:16,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102772975] [2022-02-23 18:10:16,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102772975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:16,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:16,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-23 18:10:16,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198658996] [2022-02-23 18:10:16,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:16,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:10:16,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:10:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:10:16,947 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 18:10:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:17,081 INFO L93 Difference]: Finished difference Result 144 states and 188 transitions. [2022-02-23 18:10:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-23 18:10:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 18:10:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:17,084 INFO L225 Difference]: With dead ends: 144 [2022-02-23 18:10:17,084 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 18:10:17,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:10:17,085 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:17,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 286 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 18:10:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2022-02-23 18:10:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 72 states have internal predecessors, (93), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-23 18:10:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2022-02-23 18:10:17,096 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 30 [2022-02-23 18:10:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:17,096 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2022-02-23 18:10:17,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 18:10:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2022-02-23 18:10:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 18:10:17,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:17,098 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 18:10:17,122 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 18:10:17,311 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 18:10:17,311 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:17,312 INFO L85 PathProgramCache]: Analyzing trace with hash 545740907, now seen corresponding path program 1 times [2022-02-23 18:10:17,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:17,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249590791] [2022-02-23 18:10:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:17,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:17,325 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:17,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102752485] [2022-02-23 18:10:17,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:17,326 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 18:10:17,328 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 18:10:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:10:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:17,466 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 18:10:17,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:17,594 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 18:10:17,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:17,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249590791] [2022-02-23 18:10:17,594 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:17,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102752485] [2022-02-23 18:10:17,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102752485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:17,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:17,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:10:17,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156268675] [2022-02-23 18:10:17,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:17,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:10:17,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:10:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:10:17,596 INFO L87 Difference]: Start difference. First operand 101 states and 134 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 18:10:17,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:17,745 INFO L93 Difference]: Finished difference Result 175 states and 251 transitions. [2022-02-23 18:10:17,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:10:17,747 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 18:10:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:17,749 INFO L225 Difference]: With dead ends: 175 [2022-02-23 18:10:17,749 INFO L226 Difference]: Without dead ends: 175 [2022-02-23 18:10:17,749 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 18:10:17,750 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 115 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:17,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 301 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-23 18:10:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2022-02-23 18:10:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 98 states have (on average 1.346938775510204) internal successors, (132), 99 states have internal predecessors, (132), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 18:10:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2022-02-23 18:10:17,777 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 31 [2022-02-23 18:10:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:17,777 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2022-02-23 18:10:17,778 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 18:10:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2022-02-23 18:10:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 18:10:17,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:17,779 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 18:10:17,805 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 18:10:18,003 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 18:10:18,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:18,003 INFO L85 PathProgramCache]: Analyzing trace with hash 653912885, now seen corresponding path program 1 times [2022-02-23 18:10:18,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:18,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294207382] [2022-02-23 18:10:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:18,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:18,015 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:18,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485185258] [2022-02-23 18:10:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:18,017 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 18:10:18,020 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 18:10:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:18,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:10:18,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:18,279 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 18:10:18,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:18,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:18,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294207382] [2022-02-23 18:10:18,279 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:18,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485185258] [2022-02-23 18:10:18,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485185258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:18,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:18,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-23 18:10:18,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344474825] [2022-02-23 18:10:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:18,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:10:18,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:10:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:10:18,281 INFO L87 Difference]: Start difference. First operand 132 states and 180 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 18:10:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:18,446 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2022-02-23 18:10:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:10:18,451 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 18:10:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:18,453 INFO L225 Difference]: With dead ends: 155 [2022-02-23 18:10:18,453 INFO L226 Difference]: Without dead ends: 155 [2022-02-23 18:10:18,454 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 18:10:18,454 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:18,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 249 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-23 18:10:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2022-02-23 18:10:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 108 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 18:10:18,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-02-23 18:10:18,466 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 34 [2022-02-23 18:10:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:18,467 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-02-23 18:10:18,468 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 18:10:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-02-23 18:10:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 18:10:18,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:18,473 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 18:10:18,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:18,673 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 18:10:18,674 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:18,674 INFO L85 PathProgramCache]: Analyzing trace with hash -47631820, now seen corresponding path program 1 times [2022-02-23 18:10:18,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:18,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126270721] [2022-02-23 18:10:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:18,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:18,688 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:18,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805664486] [2022-02-23 18:10:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:18,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:18,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:18,693 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 18:10:18,698 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 18:10:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:18,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 18:10:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:18,932 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 18:10:18,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:19,031 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 18:10:19,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:19,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126270721] [2022-02-23 18:10:19,031 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:19,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805664486] [2022-02-23 18:10:19,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805664486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:19,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:19,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-02-23 18:10:19,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785723394] [2022-02-23 18:10:19,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:19,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:10:19,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:10:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:10:19,033 INFO L87 Difference]: Start difference. First operand 144 states and 189 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 18:10:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:19,184 INFO L93 Difference]: Finished difference Result 177 states and 239 transitions. [2022-02-23 18:10:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:10:19,185 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 18:10:19,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:19,186 INFO L225 Difference]: With dead ends: 177 [2022-02-23 18:10:19,186 INFO L226 Difference]: Without dead ends: 177 [2022-02-23 18:10:19,186 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 18:10:19,187 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 61 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:19,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 432 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-23 18:10:19,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2022-02-23 18:10:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.34375) internal successors, (172), 129 states have internal predecessors, (172), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 18:10:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2022-02-23 18:10:19,194 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 36 [2022-02-23 18:10:19,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:19,194 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2022-02-23 18:10:19,194 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 18:10:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2022-02-23 18:10:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-23 18:10:19,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:19,195 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 18:10:19,212 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 18:10:19,399 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 18:10:19,400 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:19,400 INFO L85 PathProgramCache]: Analyzing trace with hash -375710268, now seen corresponding path program 1 times [2022-02-23 18:10:19,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:19,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297262378] [2022-02-23 18:10:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:19,420 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:19,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690289183] [2022-02-23 18:10:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:19,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:19,430 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 18:10:19,431 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 18:10:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:10:19,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:19,558 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 18:10:19,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:19,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:19,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297262378] [2022-02-23 18:10:19,559 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:19,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690289183] [2022-02-23 18:10:19,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690289183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:19,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:19,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:10:19,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929785788] [2022-02-23 18:10:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:19,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:10:19,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:19,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:10:19,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:10:19,560 INFO L87 Difference]: Start difference. First operand 174 states and 236 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 18:10:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:19,580 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-02-23 18:10:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:19,581 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 18:10:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:19,582 INFO L225 Difference]: With dead ends: 174 [2022-02-23 18:10:19,582 INFO L226 Difference]: Without dead ends: 174 [2022-02-23 18:10:19,582 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 18:10:19,583 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 18:10:19,583 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 18:10:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-23 18:10:19,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-02-23 18:10:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 128 states have (on average 1.3359375) internal successors, (171), 129 states have internal predecessors, (171), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-02-23 18:10:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2022-02-23 18:10:19,590 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 36 [2022-02-23 18:10:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2022-02-23 18:10:19,590 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 18:10:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2022-02-23 18:10:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 18:10:19,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:19,591 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 18:10:19,609 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 18:10:19,799 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 18:10:19,799 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash -344890017, now seen corresponding path program 1 times [2022-02-23 18:10:19,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:19,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580017640] [2022-02-23 18:10:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:19,811 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:19,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362793491] [2022-02-23 18:10:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:19,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:19,813 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 18:10:19,815 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 18:10:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:19,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:10:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:19,947 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 18:10:19,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:19,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:19,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580017640] [2022-02-23 18:10:19,948 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:19,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362793491] [2022-02-23 18:10:19,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362793491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:19,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:19,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:19,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122769560] [2022-02-23 18:10:19,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:19,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:19,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:19,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:19,949 INFO L87 Difference]: Start difference. First operand 174 states and 235 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 18:10:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:19,984 INFO L93 Difference]: Finished difference Result 237 states and 331 transitions. [2022-02-23 18:10:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:10:19,985 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 18:10:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:19,986 INFO L225 Difference]: With dead ends: 237 [2022-02-23 18:10:19,986 INFO L226 Difference]: Without dead ends: 237 [2022-02-23 18:10:19,987 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 18:10:19,987 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 18:10:19,987 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 18:10:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-23 18:10:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2022-02-23 18:10:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 161 states have (on average 1.3664596273291925) internal successors, (220), 162 states have internal predecessors, (220), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-23 18:10:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 324 transitions. [2022-02-23 18:10:19,996 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 324 transitions. Word has length 39 [2022-02-23 18:10:19,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:19,996 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 324 transitions. [2022-02-23 18:10:19,996 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 18:10:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 324 transitions. [2022-02-23 18:10:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-23 18:10:19,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:19,997 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 18:10:20,026 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 18:10:20,211 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 18:10:20,211 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1057809952, now seen corresponding path program 1 times [2022-02-23 18:10:20,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:20,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524029388] [2022-02-23 18:10:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:20,221 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:20,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443831466] [2022-02-23 18:10:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:20,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:20,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:20,222 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 18:10:20,245 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 18:10:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:20,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-23 18:10:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:20,483 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 18:10:20,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:20,592 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 18:10:20,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:20,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524029388] [2022-02-23 18:10:20,593 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:20,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443831466] [2022-02-23 18:10:20,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443831466] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:20,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:20,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-23 18:10:20,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437616888] [2022-02-23 18:10:20,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:20,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:10:20,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:10:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:10:20,595 INFO L87 Difference]: Start difference. First operand 230 states and 324 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 18:10:21,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:21,318 INFO L93 Difference]: Finished difference Result 390 states and 576 transitions. [2022-02-23 18:10:21,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:10:21,319 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 18:10:21,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:21,321 INFO L225 Difference]: With dead ends: 390 [2022-02-23 18:10:21,321 INFO L226 Difference]: Without dead ends: 390 [2022-02-23 18:10:21,321 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 18:10:21,322 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 152 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:21,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 438 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 18:10:21,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-23 18:10:21,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 377. [2022-02-23 18:10:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 266 states have (on average 1.4248120300751879) internal successors, (379), 267 states have internal predecessors, (379), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-02-23 18:10:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 563 transitions. [2022-02-23 18:10:21,336 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 563 transitions. Word has length 41 [2022-02-23 18:10:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:21,336 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 563 transitions. [2022-02-23 18:10:21,336 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 18:10:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 563 transitions. [2022-02-23 18:10:21,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:10:21,337 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:21,337 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 18:10:21,360 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 18:10:21,559 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 18:10:21,559 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -800046763, now seen corresponding path program 1 times [2022-02-23 18:10:21,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:21,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280517530] [2022-02-23 18:10:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:21,568 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:21,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732633528] [2022-02-23 18:10:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:21,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:21,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:21,570 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 18:10:21,574 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 18:10:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:21,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:10:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:21,700 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 18:10:21,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:21,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:21,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280517530] [2022-02-23 18:10:21,701 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:21,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732633528] [2022-02-23 18:10:21,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732633528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:21,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:21,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:21,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446137857] [2022-02-23 18:10:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:21,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:21,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:21,702 INFO L87 Difference]: Start difference. First operand 377 states and 563 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 18:10:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:21,740 INFO L93 Difference]: Finished difference Result 564 states and 884 transitions. [2022-02-23 18:10:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:10:21,741 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 18:10:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:21,744 INFO L225 Difference]: With dead ends: 564 [2022-02-23 18:10:21,744 INFO L226 Difference]: Without dead ends: 564 [2022-02-23 18:10:21,744 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 18:10:21,745 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 18:10:21,745 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 18:10:21,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-02-23 18:10:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 495. [2022-02-23 18:10:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 307 states have (on average 1.4267100977198697) internal successors, (438), 327 states have internal predecessors, (438), 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 18:10:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 774 transitions. [2022-02-23 18:10:21,765 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 774 transitions. Word has length 44 [2022-02-23 18:10:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:21,766 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 774 transitions. [2022-02-23 18:10:21,766 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 18:10:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 774 transitions. [2022-02-23 18:10:21,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:10:21,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:21,766 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 18:10:21,790 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 18:10:21,979 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 18:10:21,979 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:21,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:21,980 INFO L85 PathProgramCache]: Analyzing trace with hash 684933943, now seen corresponding path program 1 times [2022-02-23 18:10:21,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:21,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987483910] [2022-02-23 18:10:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:21,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:21,989 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:21,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871663836] [2022-02-23 18:10:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:21,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:21,990 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 18:10:22,007 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 18:10:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-23 18:10:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:22,128 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 18:10:22,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:22,246 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 18:10:22,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:22,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987483910] [2022-02-23 18:10:22,246 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:22,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871663836] [2022-02-23 18:10:22,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871663836] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:22,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:22,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-02-23 18:10:22,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445587757] [2022-02-23 18:10:22,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:22,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 18:10:22,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:22,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 18:10:22,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:10:22,248 INFO L87 Difference]: Start difference. First operand 495 states and 774 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 18:10:22,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:22,406 INFO L93 Difference]: Finished difference Result 770 states and 1118 transitions. [2022-02-23 18:10:22,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:10:22,406 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 18:10:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:22,411 INFO L225 Difference]: With dead ends: 770 [2022-02-23 18:10:22,411 INFO L226 Difference]: Without dead ends: 770 [2022-02-23 18:10:22,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:10:22,412 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 158 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:22,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 272 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:10:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-02-23 18:10:22,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 736. [2022-02-23 18:10:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 471 states have (on average 1.3630573248407643) internal successors, (642), 495 states have internal predecessors, (642), 224 states have call successors, (224), 41 states have call predecessors, (224), 40 states have return successors, (219), 199 states have call predecessors, (219), 219 states have call successors, (219) [2022-02-23 18:10:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1085 transitions. [2022-02-23 18:10:22,456 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1085 transitions. Word has length 42 [2022-02-23 18:10:22,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:22,456 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1085 transitions. [2022-02-23 18:10:22,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 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 18:10:22,456 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1085 transitions. [2022-02-23 18:10:22,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:10:22,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:22,457 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-02-23 18:10:22,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:22,678 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 18:10:22,678 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:22,679 INFO L85 PathProgramCache]: Analyzing trace with hash 841576990, now seen corresponding path program 1 times [2022-02-23 18:10:22,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:22,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506100766] [2022-02-23 18:10:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:22,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:22,688 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:22,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108550473] [2022-02-23 18:10:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:22,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:22,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:22,690 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 18:10:22,707 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 18:10:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 18:10:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:10:22,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 18:10:22,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:22,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506100766] [2022-02-23 18:10:22,986 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:22,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108550473] [2022-02-23 18:10:22,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108550473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:22,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:22,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 18:10:22,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796477939] [2022-02-23 18:10:22,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:22,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:10:22,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:22,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:10:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:10:22,989 INFO L87 Difference]: Start difference. First operand 736 states and 1085 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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 18:10:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:23,228 INFO L93 Difference]: Finished difference Result 1119 states and 1584 transitions. [2022-02-23 18:10:23,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 18:10:23,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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 43 [2022-02-23 18:10:23,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:23,233 INFO L225 Difference]: With dead ends: 1119 [2022-02-23 18:10:23,233 INFO L226 Difference]: Without dead ends: 1119 [2022-02-23 18:10:23,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2022-02-23 18:10:23,236 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 222 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:23,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 416 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:10:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-02-23 18:10:23,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1072. [2022-02-23 18:10:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 697 states have (on average 1.3113342898134863) internal successors, (914), 730 states have internal predecessors, (914), 318 states have call successors, (318), 57 states have call predecessors, (318), 56 states have return successors, (311), 284 states have call predecessors, (311), 311 states have call successors, (311) [2022-02-23 18:10:23,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1543 transitions. [2022-02-23 18:10:23,272 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1543 transitions. Word has length 43 [2022-02-23 18:10:23,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:23,272 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1543 transitions. [2022-02-23 18:10:23,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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 18:10:23,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1543 transitions. [2022-02-23 18:10:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:10:23,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:23,273 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:23,295 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 18:10:23,487 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 18:10:23,487 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:23,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash -799775801, now seen corresponding path program 2 times [2022-02-23 18:10:23,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:23,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557564650] [2022-02-23 18:10:23,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:23,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:23,495 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:23,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311798639] [2022-02-23 18:10:23,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:10:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:23,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:23,498 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 18:10:23,502 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 18:10:23,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:10:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:10:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-23 18:10:23,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:23,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:23,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557564650] [2022-02-23 18:10:23,602 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:23,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311798639] [2022-02-23 18:10:23,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311798639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:23,602 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:23,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:23,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636076785] [2022-02-23 18:10:23,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:23,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:23,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:23,603 INFO L87 Difference]: Start difference. First operand 1072 states and 1543 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 18:10:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:23,672 INFO L93 Difference]: Finished difference Result 1234 states and 1815 transitions. [2022-02-23 18:10:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 44 [2022-02-23 18:10:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:23,678 INFO L225 Difference]: With dead ends: 1234 [2022-02-23 18:10:23,678 INFO L226 Difference]: Without dead ends: 1234 [2022-02-23 18:10:23,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 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 18:10:23,679 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 29 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:23,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 195 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-02-23 18:10:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 995. [2022-02-23 18:10:23,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 660 states have (on average 1.3015151515151515) internal successors, (859), 690 states have internal predecessors, (859), 278 states have call successors, (278), 57 states have call predecessors, (278), 56 states have return successors, (271), 247 states have call predecessors, (271), 271 states have call successors, (271) [2022-02-23 18:10:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1408 transitions. [2022-02-23 18:10:23,711 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1408 transitions. Word has length 44 [2022-02-23 18:10:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:23,711 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 1408 transitions. [2022-02-23 18:10:23,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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 18:10:23,711 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1408 transitions. [2022-02-23 18:10:23,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-23 18:10:23,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:23,712 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 18:10:23,737 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 18:10:23,935 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 18:10:23,935 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2059301326, now seen corresponding path program 1 times [2022-02-23 18:10:23,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:23,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138414472] [2022-02-23 18:10:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:23,950 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:23,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832569768] [2022-02-23 18:10:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:23,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:23,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:23,952 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 18:10:23,980 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 18:10:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:24,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 57 conjunts are in the unsatisfiable core [2022-02-23 18:10:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:24,658 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 18:10:24,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:25,618 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 18:10:25,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138414472] [2022-02-23 18:10:25,618 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832569768] [2022-02-23 18:10:25,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832569768] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:25,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:25,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-02-23 18:10:25,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845334279] [2022-02-23 18:10:25,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:25,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 18:10:25,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 18:10:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-02-23 18:10:25,620 INFO L87 Difference]: Start difference. First operand 995 states and 1408 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 18:10:29,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:29,993 INFO L93 Difference]: Finished difference Result 1410 states and 2007 transitions. [2022-02-23 18:10:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-23 18:10:29,993 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 18:10:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:29,999 INFO L225 Difference]: With dead ends: 1410 [2022-02-23 18:10:29,999 INFO L226 Difference]: Without dead ends: 1404 [2022-02-23 18:10:29,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-02-23 18:10:30,000 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 175 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:30,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 644 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-23 18:10:30,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-23 18:10:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1226. [2022-02-23 18:10:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 845 states have (on average 1.2970414201183431) internal successors, (1096), 864 states have internal predecessors, (1096), 308 states have call successors, (308), 73 states have call predecessors, (308), 72 states have return successors, (303), 288 states have call predecessors, (303), 303 states have call successors, (303) [2022-02-23 18:10:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1707 transitions. [2022-02-23 18:10:30,034 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1707 transitions. Word has length 58 [2022-02-23 18:10:30,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:30,034 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 1707 transitions. [2022-02-23 18:10:30,035 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 18:10:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1707 transitions. [2022-02-23 18:10:30,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 18:10:30,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:30,036 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 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] [2022-02-23 18:10:30,063 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 18:10:30,253 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 18:10:30,253 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1248898955, now seen corresponding path program 1 times [2022-02-23 18:10:30,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:30,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269569420] [2022-02-23 18:10:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:30,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:30,261 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:30,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161226827] [2022-02-23 18:10:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:30,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:30,268 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 18:10:30,289 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 18:10:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:30,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 18:10:30,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 18:10:30,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 18:10:30,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:30,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269569420] [2022-02-23 18:10:30,683 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:30,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161226827] [2022-02-23 18:10:30,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161226827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:30,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:30,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-02-23 18:10:30,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108512002] [2022-02-23 18:10:30,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:30,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 18:10:30,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 18:10:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:10:30,685 INFO L87 Difference]: Start difference. First operand 1226 states and 1707 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 18:10:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:31,045 INFO L93 Difference]: Finished difference Result 2543 states and 3572 transitions. [2022-02-23 18:10:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-23 18:10:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 64 [2022-02-23 18:10:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:31,055 INFO L225 Difference]: With dead ends: 2543 [2022-02-23 18:10:31,056 INFO L226 Difference]: Without dead ends: 2543 [2022-02-23 18:10:31,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-02-23 18:10:31,057 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 370 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:31,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 510 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:10:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2022-02-23 18:10:31,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2406. [2022-02-23 18:10:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 1658 states have (on average 1.3094089264173703) internal successors, (2171), 1717 states have internal predecessors, (2171), 631 states have call successors, (631), 117 states have call predecessors, (631), 116 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-02-23 18:10:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 3425 transitions. [2022-02-23 18:10:31,121 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 3425 transitions. Word has length 64 [2022-02-23 18:10:31,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:31,122 INFO L470 AbstractCegarLoop]: Abstraction has 2406 states and 3425 transitions. [2022-02-23 18:10:31,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 6 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2022-02-23 18:10:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 3425 transitions. [2022-02-23 18:10:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-23 18:10:31,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:31,123 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:31,145 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 18:10:31,335 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 18:10:31,336 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash -934249537, now seen corresponding path program 1 times [2022-02-23 18:10:31,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:31,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428581088] [2022-02-23 18:10:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:31,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:31,344 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:31,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290661621] [2022-02-23 18:10:31,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:31,352 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:31,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 18:10:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:31,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:10:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-02-23 18:10:31,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-02-23 18:10:31,716 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:31,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428581088] [2022-02-23 18:10:31,716 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:31,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290661621] [2022-02-23 18:10:31,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290661621] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:10:31,716 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:10:31,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-02-23 18:10:31,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818463435] [2022-02-23 18:10:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:31,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:31,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:10:31,717 INFO L87 Difference]: Start difference. First operand 2406 states and 3425 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:10:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:31,763 INFO L93 Difference]: Finished difference Result 2465 states and 3473 transitions. [2022-02-23 18:10:31,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:10:31,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-02-23 18:10:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:31,772 INFO L225 Difference]: With dead ends: 2465 [2022-02-23 18:10:31,773 INFO L226 Difference]: Without dead ends: 2465 [2022-02-23 18:10:31,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:10:31,773 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:31,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 153 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2022-02-23 18:10:31,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2442. [2022-02-23 18:10:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2442 states, 1685 states have (on average 1.3032640949554897) internal successors, (2196), 1744 states have internal predecessors, (2196), 631 states have call successors, (631), 126 states have call predecessors, (631), 125 states have return successors, (623), 571 states have call predecessors, (623), 623 states have call successors, (623) [2022-02-23 18:10:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2442 states to 2442 states and 3450 transitions. [2022-02-23 18:10:31,871 INFO L78 Accepts]: Start accepts. Automaton has 2442 states and 3450 transitions. Word has length 67 [2022-02-23 18:10:31,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:31,871 INFO L470 AbstractCegarLoop]: Abstraction has 2442 states and 3450 transitions. [2022-02-23 18:10:31,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:10:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2442 states and 3450 transitions. [2022-02-23 18:10:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-23 18:10:31,872 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:31,872 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:31,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:32,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,087 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1422612783, now seen corresponding path program 1 times [2022-02-23 18:10:32,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:32,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593155644] [2022-02-23 18:10:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:32,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:32,096 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:32,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010900863] [2022-02-23 18:10:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:32,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:32,098 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:32,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 18:10:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:10:32,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-23 18:10:32,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:10:32,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:32,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593155644] [2022-02-23 18:10:32,249 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:32,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010900863] [2022-02-23 18:10:32,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010900863] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:10:32,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:10:32,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:10:32,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198321841] [2022-02-23 18:10:32,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:10:32,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:10:32,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:32,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:10:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:10:32,250 INFO L87 Difference]: Start difference. First operand 2442 states and 3450 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 18:10:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:32,295 INFO L93 Difference]: Finished difference Result 2578 states and 3563 transitions. [2022-02-23 18:10:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:10:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-02-23 18:10:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:32,305 INFO L225 Difference]: With dead ends: 2578 [2022-02-23 18:10:32,305 INFO L226 Difference]: Without dead ends: 2578 [2022-02-23 18:10:32,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:10:32,306 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:32,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 159 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:10:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2022-02-23 18:10:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 2372. [2022-02-23 18:10:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 1689 states have (on average 1.2948490230905862) internal successors, (2187), 1720 states have internal predecessors, (2187), 559 states have call successors, (559), 124 states have call predecessors, (559), 123 states have return successors, (551), 527 states have call predecessors, (551), 551 states have call successors, (551) [2022-02-23 18:10:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3297 transitions. [2022-02-23 18:10:32,370 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3297 transitions. Word has length 73 [2022-02-23 18:10:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:32,370 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3297 transitions. [2022-02-23 18:10:32,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-02-23 18:10:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3297 transitions. [2022-02-23 18:10:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 18:10:32,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:32,371 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:32,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:32,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,587 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:32,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1662269742, now seen corresponding path program 2 times [2022-02-23 18:10:32,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:32,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503331712] [2022-02-23 18:10:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:32,594 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:32,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485360533] [2022-02-23 18:10:32,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:10:32,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:32,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:32,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:32,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 18:10:32,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:10:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 82 conjunts are in the unsatisfiable core [2022-02-23 18:10:32,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-02-23 18:10:33,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-02-23 18:10:35,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:35,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503331712] [2022-02-23 18:10:35,018 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:35,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485360533] [2022-02-23 18:10:35,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485360533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:35,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:35,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 28 [2022-02-23 18:10:35,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351578630] [2022-02-23 18:10:35,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:35,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-23 18:10:35,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:35,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-23 18:10:35,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:10:35,020 INFO L87 Difference]: Start difference. First operand 2372 states and 3297 transitions. Second operand has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 18:10:44,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:51,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:10:51,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:51,904 INFO L93 Difference]: Finished difference Result 2867 states and 3884 transitions. [2022-02-23 18:10:51,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-23 18:10:51,905 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 75 [2022-02-23 18:10:51,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:51,915 INFO L225 Difference]: With dead ends: 2867 [2022-02-23 18:10:51,915 INFO L226 Difference]: Without dead ends: 2863 [2022-02-23 18:10:51,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 18:10:51,916 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 303 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 318 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:51,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 742 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 958 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2022-02-23 18:10:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-02-23 18:10:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2736. [2022-02-23 18:10:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 1985 states have (on average 1.2916876574307306) internal successors, (2564), 2026 states have internal predecessors, (2564), 594 states have call successors, (594), 158 states have call predecessors, (594), 156 states have return successors, (587), 551 states have call predecessors, (587), 587 states have call successors, (587) [2022-02-23 18:10:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 3745 transitions. [2022-02-23 18:10:51,981 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 3745 transitions. Word has length 75 [2022-02-23 18:10:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:51,981 INFO L470 AbstractCegarLoop]: Abstraction has 2736 states and 3745 transitions. [2022-02-23 18:10:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.0) internal successors, (78), 22 states have internal predecessors, (78), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2022-02-23 18:10:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 3745 transitions. [2022-02-23 18:10:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-23 18:10:51,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:51,983 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:10:52,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 18:10:52,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 18:10:52,197 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:52,197 INFO L85 PathProgramCache]: Analyzing trace with hash 612727057, now seen corresponding path program 1 times [2022-02-23 18:10:52,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:52,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752986146] [2022-02-23 18:10:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:52,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:52,205 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:52,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21471894] [2022-02-23 18:10:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:52,213 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:10:52,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 18:10:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:10:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 86 conjunts are in the unsatisfiable core [2022-02-23 18:10:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-02-23 18:10:53,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:10:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-02-23 18:10:58,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:10:58,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752986146] [2022-02-23 18:10:58,314 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:10:58,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21471894] [2022-02-23 18:10:58,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21471894] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:10:58,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:10:58,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-02-23 18:10:58,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455364774] [2022-02-23 18:10:58,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:10:58,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 18:10:58,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:10:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 18:10:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-02-23 18:10:58,315 INFO L87 Difference]: Start difference. First operand 2736 states and 3745 transitions. Second operand has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-02-23 18:11:09,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:14,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:29,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:35,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:40,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:47,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:54,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:56,139 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:11:58,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:00,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:03,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:15,953 INFO L93 Difference]: Finished difference Result 3415 states and 4643 transitions. [2022-02-23 18:12:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 18:12:15,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) Word has length 88 [2022-02-23 18:12:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:15,965 INFO L225 Difference]: With dead ends: 3415 [2022-02-23 18:12:15,965 INFO L226 Difference]: Without dead ends: 3386 [2022-02-23 18:12:15,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 166 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3712 ImplicationChecksByTransitivity, 46.2s TimeCoverageRelationStatistics Valid=1770, Invalid=9150, Unknown=0, NotChecked=0, Total=10920 [2022-02-23 18:12:15,969 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 389 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 491 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:15,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1305 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 1687 Invalid, 10 Unknown, 0 Unchecked, 33.7s Time] [2022-02-23 18:12:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-02-23 18:12:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 3094. [2022-02-23 18:12:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3094 states, 2229 states have (on average 1.2960969044414536) internal successors, (2889), 2276 states have internal predecessors, (2889), 689 states have call successors, (689), 177 states have call predecessors, (689), 175 states have return successors, (682), 640 states have call predecessors, (682), 682 states have call successors, (682) [2022-02-23 18:12:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3094 states to 3094 states and 4260 transitions. [2022-02-23 18:12:16,038 INFO L78 Accepts]: Start accepts. Automaton has 3094 states and 4260 transitions. Word has length 88 [2022-02-23 18:12:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:16,038 INFO L470 AbstractCegarLoop]: Abstraction has 3094 states and 4260 transitions. [2022-02-23 18:12:16,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.84) internal successors, (71), 26 states have internal predecessors, (71), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 8 states have call predecessors, (19), 9 states have call successors, (19) [2022-02-23 18:12:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3094 states and 4260 transitions. [2022-02-23 18:12:16,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-23 18:12:16,040 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:16,040 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:16,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:16,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 18:12:16,262 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:16,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1189405093, now seen corresponding path program 3 times [2022-02-23 18:12:16,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:16,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337550711] [2022-02-23 18:12:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:16,270 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:16,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247911644] [2022-02-23 18:12:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:12:16,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:16,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:16,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:16,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 18:12:16,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:12:16,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-23 18:12:16,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-02-23 18:12:16,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 51 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-02-23 18:12:17,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:17,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337550711] [2022-02-23 18:12:17,176 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:17,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247911644] [2022-02-23 18:12:17,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247911644] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:17,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:17,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 18:12:17,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856559401] [2022-02-23 18:12:17,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:17,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:12:17,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:12:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:12:17,177 INFO L87 Difference]: Start difference. First operand 3094 states and 4260 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 18:12:20,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:22,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:25,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:26,076 INFO L93 Difference]: Finished difference Result 3289 states and 4528 transitions. [2022-02-23 18:12:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-23 18:12:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 97 [2022-02-23 18:12:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:26,088 INFO L225 Difference]: With dead ends: 3289 [2022-02-23 18:12:26,089 INFO L226 Difference]: Without dead ends: 3279 [2022-02-23 18:12:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2022-02-23 18:12:26,089 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 102 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 119 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:26,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 685 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 494 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2022-02-23 18:12:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2022-02-23 18:12:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 3021. [2022-02-23 18:12:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2161 states have (on average 1.2952336881073576) internal successors, (2799), 2203 states have internal predecessors, (2799), 684 states have call successors, (684), 177 states have call predecessors, (684), 175 states have return successors, (682), 640 states have call predecessors, (682), 682 states have call successors, (682) [2022-02-23 18:12:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4165 transitions. [2022-02-23 18:12:26,150 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4165 transitions. Word has length 97 [2022-02-23 18:12:26,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:26,151 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 4165 transitions. [2022-02-23 18:12:26,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 15 states have internal predecessors, (82), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-02-23 18:12:26,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4165 transitions. [2022-02-23 18:12:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-23 18:12:26,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:26,153 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:26,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:26,376 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1037830812, now seen corresponding path program 1 times [2022-02-23 18:12:26,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:26,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044923821] [2022-02-23 18:12:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:26,384 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:26,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339394666] [2022-02-23 18:12:26,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:26,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:26,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:26,387 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:26,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 18:12:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:12:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:12:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 18:12:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 18:12:26,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:26,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044923821] [2022-02-23 18:12:26,908 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:26,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339394666] [2022-02-23 18:12:26,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339394666] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:26,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:26,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-02-23 18:12:26,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667893482] [2022-02-23 18:12:26,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:12:26,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:12:26,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:12:26,910 INFO L87 Difference]: Start difference. First operand 3021 states and 4165 transitions. Second operand has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 18:12:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:27,480 INFO L93 Difference]: Finished difference Result 5645 states and 7820 transitions. [2022-02-23 18:12:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-23 18:12:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 98 [2022-02-23 18:12:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:27,503 INFO L225 Difference]: With dead ends: 5645 [2022-02-23 18:12:27,504 INFO L226 Difference]: Without dead ends: 5645 [2022-02-23 18:12:27,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2022-02-23 18:12:27,505 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 590 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 700 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 18:12:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5645 states. [2022-02-23 18:12:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5645 to 5348. [2022-02-23 18:12:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 3600 states have (on average 1.2855555555555556) internal successors, (4628), 3622 states have internal predecessors, (4628), 1441 states have call successors, (1441), 308 states have call predecessors, (1441), 306 states have return successors, (1439), 1417 states have call predecessors, (1439), 1439 states have call successors, (1439) [2022-02-23 18:12:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 7508 transitions. [2022-02-23 18:12:27,623 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 7508 transitions. Word has length 98 [2022-02-23 18:12:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:27,624 INFO L470 AbstractCegarLoop]: Abstraction has 5348 states and 7508 transitions. [2022-02-23 18:12:27,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.0) internal successors, (96), 24 states have internal predecessors, (96), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 18:12:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 7508 transitions. [2022-02-23 18:12:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-23 18:12:27,625 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:27,626 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-02-23 18:12:27,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:27,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:27,841 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:27,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2067527905, now seen corresponding path program 2 times [2022-02-23 18:12:27,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:27,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683265256] [2022-02-23 18:12:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:27,848 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:27,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946009895] [2022-02-23 18:12:27,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:12:27,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:27,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:27,850 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:27,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-23 18:12:27,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:12:27,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:27,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-02-23 18:12:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-02-23 18:12:28,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-02-23 18:12:30,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:30,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683265256] [2022-02-23 18:12:30,744 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:30,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946009895] [2022-02-23 18:12:30,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946009895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:30,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:30,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-02-23 18:12:30,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957670193] [2022-02-23 18:12:30,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:30,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-23 18:12:30,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-23 18:12:30,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-02-23 18:12:30,745 INFO L87 Difference]: Start difference. First operand 5348 states and 7508 transitions. Second operand has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:12:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:35,634 INFO L93 Difference]: Finished difference Result 6298 states and 8816 transitions. [2022-02-23 18:12:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-23 18:12:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 108 [2022-02-23 18:12:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:35,652 INFO L225 Difference]: With dead ends: 6298 [2022-02-23 18:12:35,652 INFO L226 Difference]: Without dead ends: 6294 [2022-02-23 18:12:35,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=0, NotChecked=0, Total=1806 [2022-02-23 18:12:35,653 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 171 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1057 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:35,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1057 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-23 18:12:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2022-02-23 18:12:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 5701. [2022-02-23 18:12:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5701 states, 3772 states have (on average 1.2932131495227996) internal successors, (4878), 3794 states have internal predecessors, (4878), 1597 states have call successors, (1597), 333 states have call predecessors, (1597), 331 states have return successors, (1595), 1573 states have call predecessors, (1595), 1595 states have call successors, (1595) [2022-02-23 18:12:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5701 states to 5701 states and 8070 transitions. [2022-02-23 18:12:35,761 INFO L78 Accepts]: Start accepts. Automaton has 5701 states and 8070 transitions. Word has length 108 [2022-02-23 18:12:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:35,762 INFO L470 AbstractCegarLoop]: Abstraction has 5701 states and 8070 transitions. [2022-02-23 18:12:35,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.45) internal successors, (69), 21 states have internal predecessors, (69), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:12:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5701 states and 8070 transitions. [2022-02-23 18:12:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-23 18:12:35,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:35,764 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:35,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-23 18:12:35,979 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -55503749, now seen corresponding path program 1 times [2022-02-23 18:12:35,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:35,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375006632] [2022-02-23 18:12:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:35,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:35,990 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:35,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131656879] [2022-02-23 18:12:35,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:35,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:35,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:35,992 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:35,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-23 18:12:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:12:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:12:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 18:12:36,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-23 18:12:36,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:36,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375006632] [2022-02-23 18:12:36,557 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:36,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131656879] [2022-02-23 18:12:36,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131656879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:36,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:36,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 18:12:36,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575459986] [2022-02-23 18:12:36,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 18:12:36,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 18:12:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:12:36,559 INFO L87 Difference]: Start difference. First operand 5701 states and 8070 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 18:12:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:37,199 INFO L93 Difference]: Finished difference Result 6603 states and 8967 transitions. [2022-02-23 18:12:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-23 18:12:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 105 [2022-02-23 18:12:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:37,217 INFO L225 Difference]: With dead ends: 6603 [2022-02-23 18:12:37,217 INFO L226 Difference]: Without dead ends: 6603 [2022-02-23 18:12:37,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2022-02-23 18:12:37,218 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 620 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:37,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 734 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 18:12:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6603 states. [2022-02-23 18:12:37,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6603 to 6434. [2022-02-23 18:12:37,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6434 states, 4203 states have (on average 1.211753509398049) internal successors, (5093), 4221 states have internal predecessors, (5093), 1853 states have call successors, (1853), 379 states have call predecessors, (1853), 377 states have return successors, (1851), 1833 states have call predecessors, (1851), 1851 states have call successors, (1851) [2022-02-23 18:12:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6434 states to 6434 states and 8797 transitions. [2022-02-23 18:12:37,354 INFO L78 Accepts]: Start accepts. Automaton has 6434 states and 8797 transitions. Word has length 105 [2022-02-23 18:12:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:37,355 INFO L470 AbstractCegarLoop]: Abstraction has 6434 states and 8797 transitions. [2022-02-23 18:12:37,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 8 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2022-02-23 18:12:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6434 states and 8797 transitions. [2022-02-23 18:12:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-23 18:12:37,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:37,359 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:37,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:37,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-02-23 18:12:37,583 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:37,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:37,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1765875055, now seen corresponding path program 2 times [2022-02-23 18:12:37,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:37,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512786298] [2022-02-23 18:12:37,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:37,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:37,595 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:37,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591796673] [2022-02-23 18:12:37,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:12:37,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:37,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:37,597 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:37,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-23 18:12:37,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:12:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 18:12:37,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-02-23 18:12:38,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-02-23 18:12:38,421 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:38,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512786298] [2022-02-23 18:12:38,421 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:38,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591796673] [2022-02-23 18:12:38,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591796673] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:38,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:38,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-02-23 18:12:38,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901281221] [2022-02-23 18:12:38,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:38,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-23 18:12:38,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:38,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-23 18:12:38,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-02-23 18:12:38,423 INFO L87 Difference]: Start difference. First operand 6434 states and 8797 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-02-23 18:12:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:39,514 INFO L93 Difference]: Finished difference Result 11808 states and 16560 transitions. [2022-02-23 18:12:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-23 18:12:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) Word has length 132 [2022-02-23 18:12:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:39,549 INFO L225 Difference]: With dead ends: 11808 [2022-02-23 18:12:39,549 INFO L226 Difference]: Without dead ends: 11808 [2022-02-23 18:12:39,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1327, Invalid=2333, Unknown=0, NotChecked=0, Total=3660 [2022-02-23 18:12:39,551 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 1076 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 973 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-23 18:12:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11808 states. [2022-02-23 18:12:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11808 to 11324. [2022-02-23 18:12:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 7570 states have (on average 1.2715984147952444) internal successors, (9626), 7660 states have internal predecessors, (9626), 3197 states have call successors, (3197), 558 states have call predecessors, (3197), 556 states have return successors, (3195), 3105 states have call predecessors, (3195), 3195 states have call successors, (3195) [2022-02-23 18:12:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 16018 transitions. [2022-02-23 18:12:39,834 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 16018 transitions. Word has length 132 [2022-02-23 18:12:39,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:39,834 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 16018 transitions. [2022-02-23 18:12:39,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 34 states have internal predecessors, (131), 10 states have call successors, (32), 7 states have call predecessors, (32), 6 states have return successors, (30), 8 states have call predecessors, (30), 9 states have call successors, (30) [2022-02-23 18:12:39,835 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 16018 transitions. [2022-02-23 18:12:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 18:12:39,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:39,838 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:39,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:40,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-23 18:12:40,051 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1118265052, now seen corresponding path program 3 times [2022-02-23 18:12:40,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:40,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945077551] [2022-02-23 18:12:40,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:40,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:40,065 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:40,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121127326] [2022-02-23 18:12:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:12:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:40,068 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:12:40,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-23 18:12:40,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-23 18:12:40,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 76 conjunts are in the unsatisfiable core [2022-02-23 18:12:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:41,396 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:12:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 90 proven. 51 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-02-23 18:12:41,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:47,105 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:12:52,676 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:52,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945077551] [2022-02-23 18:12:52,676 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:52,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121127326] [2022-02-23 18:12:52,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121127326] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:12:52,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:12:52,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-02-23 18:12:52,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177297786] [2022-02-23 18:12:52,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 18:12:52,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 18:12:52,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=466, Unknown=2, NotChecked=0, Total=552 [2022-02-23 18:12:52,678 INFO L87 Difference]: Start difference. First operand 11324 states and 16018 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-23 18:12:57,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:03,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:04,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:04,980 INFO L93 Difference]: Finished difference Result 13255 states and 18725 transitions. [2022-02-23 18:13:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 18:13:04,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 138 [2022-02-23 18:13:04,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:05,020 INFO L225 Difference]: With dead ends: 13255 [2022-02-23 18:13:05,020 INFO L226 Difference]: Without dead ends: 13252 [2022-02-23 18:13:05,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=175, Invalid=944, Unknown=3, NotChecked=0, Total=1122 [2022-02-23 18:13:05,021 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 102 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:05,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 960 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 958 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-02-23 18:13:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13252 states. [2022-02-23 18:13:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13252 to 12853. [2022-02-23 18:13:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12853 states, 8548 states have (on average 1.2753860552175948) internal successors, (10902), 8650 states have internal predecessors, (10902), 3685 states have call successors, (3685), 621 states have call predecessors, (3685), 619 states have return successors, (3683), 3581 states have call predecessors, (3683), 3683 states have call successors, (3683) [2022-02-23 18:13:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12853 states to 12853 states and 18270 transitions. [2022-02-23 18:13:05,326 INFO L78 Accepts]: Start accepts. Automaton has 12853 states and 18270 transitions. Word has length 138 [2022-02-23 18:13:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:05,326 INFO L470 AbstractCegarLoop]: Abstraction has 12853 states and 18270 transitions. [2022-02-23 18:13:05,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-02-23 18:13:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12853 states and 18270 transitions. [2022-02-23 18:13:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-23 18:13:05,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:05,331 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:05,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:05,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-02-23 18:13:05,555 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1657425713, now seen corresponding path program 4 times [2022-02-23 18:13:05,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:05,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264929119] [2022-02-23 18:13:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:05,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:05,566 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:05,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733323549] [2022-02-23 18:13:05,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:13:05,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:05,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:05,568 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:05,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-23 18:13:05,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:13:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:13:05,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 100 conjunts are in the unsatisfiable core [2022-02-23 18:13:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 95 proven. 148 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-02-23 18:13:07,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:07,574 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:13:10,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:10,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264929119] [2022-02-23 18:13:10,563 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:10,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733323549] [2022-02-23 18:13:10,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733323549] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:13:10,563 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:13:10,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-02-23 18:13:10,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983581689] [2022-02-23 18:13:10,563 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:10,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-23 18:13:10,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-23 18:13:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:13:10,564 INFO L87 Difference]: Start difference. First operand 12853 states and 18270 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:13:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:12,239 INFO L93 Difference]: Finished difference Result 13800 states and 19537 transitions. [2022-02-23 18:13:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 18:13:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 145 [2022-02-23 18:13:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:12,284 INFO L225 Difference]: With dead ends: 13800 [2022-02-23 18:13:12,284 INFO L226 Difference]: Without dead ends: 13797 [2022-02-23 18:13:12,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2022-02-23 18:13:12,285 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 132 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:12,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 1334 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 18:13:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13797 states. [2022-02-23 18:13:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13797 to 13485. [2022-02-23 18:13:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13485 states, 8906 states have (on average 1.2765551313721086) internal successors, (11369), 9012 states have internal predecessors, (11369), 3916 states have call successors, (3916), 664 states have call predecessors, (3916), 662 states have return successors, (3914), 3808 states have call predecessors, (3914), 3914 states have call successors, (3914) [2022-02-23 18:13:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13485 states to 13485 states and 19199 transitions. [2022-02-23 18:13:12,597 INFO L78 Accepts]: Start accepts. Automaton has 13485 states and 19199 transitions. Word has length 145 [2022-02-23 18:13:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 13485 states and 19199 transitions. [2022-02-23 18:13:12,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:13:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 13485 states and 19199 transitions. [2022-02-23 18:13:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-23 18:13:12,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:12,604 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:12,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:12,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-02-23 18:13:12,823 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:12,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:12,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1291712014, now seen corresponding path program 5 times [2022-02-23 18:13:12,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:12,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694901455] [2022-02-23 18:13:12,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:12,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:12,833 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:12,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55918218] [2022-02-23 18:13:12,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 18:13:12,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:12,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:12,835 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:12,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-23 18:13:13,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-02-23 18:13:13,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:13:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2022-02-23 18:13:13,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 77 proven. 170 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2022-02-23 18:13:15,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 128 proven. 115 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2022-02-23 18:13:20,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:20,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694901455] [2022-02-23 18:13:20,885 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:20,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55918218] [2022-02-23 18:13:20,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55918218] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:20,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:20,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2022-02-23 18:13:20,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306721593] [2022-02-23 18:13:20,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:20,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-23 18:13:20,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-23 18:13:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 18:13:20,887 INFO L87 Difference]: Start difference. First operand 13485 states and 19199 transitions. Second operand has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-02-23 18:13:32,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:38,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:57,382 WARN L232 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 134 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:13:59,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:21,434 WARN L232 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:14:38,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:47,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:56,863 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:04,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:10,768 WARN L232 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 99 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:15:20,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:26,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:31,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.58s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:46,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:15:46,139 INFO L93 Difference]: Finished difference Result 20112 states and 29014 transitions. [2022-02-23 18:15:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-23 18:15:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 161 [2022-02-23 18:15:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:15:46,191 INFO L225 Difference]: With dead ends: 20112 [2022-02-23 18:15:46,191 INFO L226 Difference]: Without dead ends: 20108 [2022-02-23 18:15:46,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4036 ImplicationChecksByTransitivity, 86.8s TimeCoverageRelationStatistics Valid=2343, Invalid=10767, Unknown=0, NotChecked=0, Total=13110 [2022-02-23 18:15:46,194 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 435 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 942 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 3888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 942 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:15:46,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 1955 Invalid, 3888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [942 Valid, 2936 Invalid, 10 Unknown, 0 Unchecked, 63.5s Time] [2022-02-23 18:15:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2022-02-23 18:15:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 16439. [2022-02-23 18:15:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16439 states, 10876 states have (on average 1.2932144170650974) internal successors, (14065), 11004 states have internal predecessors, (14065), 4793 states have call successors, (4793), 771 states have call predecessors, (4793), 769 states have return successors, (4791), 4663 states have call predecessors, (4791), 4791 states have call successors, (4791) [2022-02-23 18:15:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16439 states to 16439 states and 23649 transitions. [2022-02-23 18:15:46,606 INFO L78 Accepts]: Start accepts. Automaton has 16439 states and 23649 transitions. Word has length 161 [2022-02-23 18:15:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:15:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 16439 states and 23649 transitions. [2022-02-23 18:15:46,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.129032258064516) internal successors, (97), 31 states have internal predecessors, (97), 13 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2022-02-23 18:15:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 16439 states and 23649 transitions. [2022-02-23 18:15:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-02-23 18:15:46,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:15:46,614 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:15:46,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-23 18:15:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:46,821 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:15:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:15:46,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2087386651, now seen corresponding path program 6 times [2022-02-23 18:15:46,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:15:46,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064662445] [2022-02-23 18:15:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:46,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:15:46,831 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:15:46,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407109769] [2022-02-23 18:15:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-23 18:15:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:15:46,833 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:15:46,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-23 18:15:46,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-02-23 18:15:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:15:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 18:15:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:15:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 368 proven. 21 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-02-23 18:15:47,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:15:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 120 proven. 21 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-02-23 18:15:47,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:15:47,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064662445] [2022-02-23 18:15:47,591 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:15:47,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407109769] [2022-02-23 18:15:47,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407109769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:15:47,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:15:47,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-02-23 18:15:47,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505474983] [2022-02-23 18:15:47,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:15:47,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 18:15:47,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:15:47,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 18:15:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:15:47,592 INFO L87 Difference]: Start difference. First operand 16439 states and 23649 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-02-23 18:15:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:15:47,846 INFO L93 Difference]: Finished difference Result 21850 states and 31974 transitions. [2022-02-23 18:15:47,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:15:47,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 165 [2022-02-23 18:15:47,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:15:47,903 INFO L225 Difference]: With dead ends: 21850 [2022-02-23 18:15:47,904 INFO L226 Difference]: Without dead ends: 21850 [2022-02-23 18:15:47,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:15:47,904 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 30 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:15:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 334 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:15:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21850 states. [2022-02-23 18:15:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21850 to 19647. [2022-02-23 18:15:48,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19647 states, 12993 states have (on average 1.317016855229739) internal successors, (17112), 13282 states have internal predecessors, (17112), 5930 states have call successors, (5930), 725 states have call predecessors, (5930), 723 states have return successors, (5928), 5639 states have call predecessors, (5928), 5928 states have call successors, (5928) [2022-02-23 18:15:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19647 states to 19647 states and 28970 transitions. [2022-02-23 18:15:48,567 INFO L78 Accepts]: Start accepts. Automaton has 19647 states and 28970 transitions. Word has length 165 [2022-02-23 18:15:48,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:15:48,568 INFO L470 AbstractCegarLoop]: Abstraction has 19647 states and 28970 transitions. [2022-02-23 18:15:48,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2022-02-23 18:15:48,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19647 states and 28970 transitions. [2022-02-23 18:15:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-23 18:15:48,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:15:48,581 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:15:48,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-23 18:15:48,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-02-23 18:15:48,799 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:15:48,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:15:48,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1604879327, now seen corresponding path program 7 times [2022-02-23 18:15:48,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:15:48,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787969240] [2022-02-23 18:15:48,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:48,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:15:48,812 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:15:48,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749109489] [2022-02-23 18:15:48,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-23 18:15:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:15:48,815 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:15:48,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-23 18:15:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:15:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 113 conjunts are in the unsatisfiable core [2022-02-23 18:15:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:15:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 926 backedges. 183 proven. 171 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-02-23 18:15:50,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:15:51,274 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:15:55,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:15:55,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787969240] [2022-02-23 18:15:55,251 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:15:55,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749109489] [2022-02-23 18:15:55,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749109489] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:15:55,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:15:55,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-02-23 18:15:55,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644588211] [2022-02-23 18:15:55,252 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:15:55,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-23 18:15:55,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:15:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-23 18:15:55,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:15:55,253 INFO L87 Difference]: Start difference. First operand 19647 states and 28970 transitions. Second operand has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-02-23 18:15:56,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:15:56,639 INFO L93 Difference]: Finished difference Result 20711 states and 30465 transitions. [2022-02-23 18:15:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 18:15:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 168 [2022-02-23 18:15:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:15:56,712 INFO L225 Difference]: With dead ends: 20711 [2022-02-23 18:15:56,712 INFO L226 Difference]: Without dead ends: 20708 [2022-02-23 18:15:56,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-02-23 18:15:56,713 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 135 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1515 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-23 18:15:56,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 1515 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-23 18:15:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20708 states. [2022-02-23 18:15:57,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20708 to 19857. [2022-02-23 18:15:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19857 states, 13117 states have (on average 1.3153922390790578) internal successors, (17254), 13412 states have internal predecessors, (17254), 5999 states have call successors, (5999), 742 states have call predecessors, (5999), 740 states have return successors, (5997), 5702 states have call predecessors, (5997), 5997 states have call successors, (5997) [2022-02-23 18:15:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19857 states to 19857 states and 29250 transitions. [2022-02-23 18:15:57,283 INFO L78 Accepts]: Start accepts. Automaton has 19857 states and 29250 transitions. Word has length 168 [2022-02-23 18:15:57,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:15:57,283 INFO L470 AbstractCegarLoop]: Abstraction has 19857 states and 29250 transitions. [2022-02-23 18:15:57,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2022-02-23 18:15:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 19857 states and 29250 transitions. [2022-02-23 18:15:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-23 18:15:57,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:15:57,293 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:15:57,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-23 18:15:57,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:57,518 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:15:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:15:57,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1051070357, now seen corresponding path program 8 times [2022-02-23 18:15:57,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:15:57,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795399291] [2022-02-23 18:15:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:15:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:15:57,531 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:15:57,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646782327] [2022-02-23 18:15:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:15:57,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:15:57,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:15:57,532 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:15:57,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-23 18:15:57,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:15:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:15:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 119 conjunts are in the unsatisfiable core [2022-02-23 18:15:57,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:16:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 315 proven. 205 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-02-23 18:16:00,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:16:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 325 proven. 4 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-02-23 18:16:09,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:16:09,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795399291] [2022-02-23 18:16:09,695 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:16:09,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646782327] [2022-02-23 18:16:09,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646782327] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:16:09,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:16:09,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-02-23 18:16:09,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539212743] [2022-02-23 18:16:09,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:16:09,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-23 18:16:09,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:16:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-23 18:16:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-23 18:16:09,697 INFO L87 Difference]: Start difference. First operand 19857 states and 29250 transitions. Second operand has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) [2022-02-23 18:16:22,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:28,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:36,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:40,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:43,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:44,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:48,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:57,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:06,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:09,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:14,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:16,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:17:19,369 INFO L93 Difference]: Finished difference Result 23710 states and 35403 transitions. [2022-02-23 18:17:19,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-23 18:17:19,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) Word has length 188 [2022-02-23 18:17:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:17:19,430 INFO L225 Difference]: With dead ends: 23710 [2022-02-23 18:17:19,430 INFO L226 Difference]: Without dead ends: 23706 [2022-02-23 18:17:19,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 352 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=1165, Invalid=7205, Unknown=2, NotChecked=0, Total=8372 [2022-02-23 18:17:19,432 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 192 mSDsluCounter, 1512 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 396 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:17:19,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 1615 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2031 Invalid, 6 Unknown, 0 Unchecked, 35.7s Time] [2022-02-23 18:17:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23706 states. [2022-02-23 18:17:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23706 to 17444. [2022-02-23 18:17:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17444 states, 11360 states have (on average 1.3026408450704225) internal successors, (14798), 11623 states have internal predecessors, (14798), 5361 states have call successors, (5361), 724 states have call predecessors, (5361), 722 states have return successors, (5359), 5096 states have call predecessors, (5359), 5359 states have call successors, (5359) [2022-02-23 18:17:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17444 states to 17444 states and 25518 transitions. [2022-02-23 18:17:19,904 INFO L78 Accepts]: Start accepts. Automaton has 17444 states and 25518 transitions. Word has length 188 [2022-02-23 18:17:19,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:17:19,904 INFO L470 AbstractCegarLoop]: Abstraction has 17444 states and 25518 transitions. [2022-02-23 18:17:19,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 3.52) internal successors, (88), 26 states have internal predecessors, (88), 14 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 13 states have call predecessors, (35), 12 states have call successors, (35) [2022-02-23 18:17:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17444 states and 25518 transitions. [2022-02-23 18:17:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-02-23 18:17:19,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:17:19,913 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 10, 9, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:17:19,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-23 18:17:20,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:17:20,140 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:17:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:17:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1872087437, now seen corresponding path program 1 times [2022-02-23 18:17:20,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:17:20,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890609680] [2022-02-23 18:17:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:17:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:17:20,150 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:17:20,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219022600] [2022-02-23 18:17:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:17:20,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:17:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:17:20,152 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:17:20,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-23 18:17:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:17:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 45 conjunts are in the unsatisfiable core [2022-02-23 18:17:20,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:17:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 897 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 18:17:20,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:17:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 63 proven. 257 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-23 18:17:21,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:17:21,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890609680] [2022-02-23 18:17:21,456 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:17:21,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219022600] [2022-02-23 18:17:21,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219022600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:17:21,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:17:21,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-02-23 18:17:21,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679795787] [2022-02-23 18:17:21,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:17:21,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-23 18:17:21,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:17:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-23 18:17:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-02-23 18:17:21,458 INFO L87 Difference]: Start difference. First operand 17444 states and 25518 transitions. Second operand has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 18:17:23,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:17:23,225 INFO L93 Difference]: Finished difference Result 27205 states and 39685 transitions. [2022-02-23 18:17:23,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-23 18:17:23,226 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 196 [2022-02-23 18:17:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:17:23,340 INFO L225 Difference]: With dead ends: 27205 [2022-02-23 18:17:23,341 INFO L226 Difference]: Without dead ends: 27205 [2022-02-23 18:17:23,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2609, Invalid=4531, Unknown=0, NotChecked=0, Total=7140 [2022-02-23 18:17:23,342 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 1462 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 1794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:17:23,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 1314 Invalid, 1794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 18:17:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27205 states. [2022-02-23 18:17:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27205 to 26730. [2022-02-23 18:17:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26730 states, 17131 states have (on average 1.2922187846593893) internal successors, (22137), 17434 states have internal predecessors, (22137), 8514 states have call successors, (8514), 1086 states have call predecessors, (8514), 1084 states have return successors, (8512), 8209 states have call predecessors, (8512), 8512 states have call successors, (8512) [2022-02-23 18:17:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26730 states to 26730 states and 39163 transitions. [2022-02-23 18:17:23,896 INFO L78 Accepts]: Start accepts. Automaton has 26730 states and 39163 transitions. Word has length 196 [2022-02-23 18:17:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:17:23,896 INFO L470 AbstractCegarLoop]: Abstraction has 26730 states and 39163 transitions. [2022-02-23 18:17:23,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9347826086956523) internal successors, (181), 46 states have internal predecessors, (181), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 18:17:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26730 states and 39163 transitions. [2022-02-23 18:17:23,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-23 18:17:23,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:17:23,908 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 12, 12, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:17:23,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-23 18:17:24,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-02-23 18:17:24,132 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:17:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:17:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2139737637, now seen corresponding path program 2 times [2022-02-23 18:17:24,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:17:24,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487320581] [2022-02-23 18:17:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:17:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:17:24,143 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:17:24,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089233925] [2022-02-23 18:17:24,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:17:24,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:17:24,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:17:24,145 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:17:24,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-23 18:17:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:17:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:17:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 18:17:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:17:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 950 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-23 18:17:24,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:17:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 101 proven. 310 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-02-23 18:17:25,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:17:25,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487320581] [2022-02-23 18:17:25,674 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:17:25,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089233925] [2022-02-23 18:17:25,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089233925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:17:25,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:17:25,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-23 18:17:25,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283520627] [2022-02-23 18:17:25,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:17:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 18:17:25,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:17:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 18:17:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 18:17:25,676 INFO L87 Difference]: Start difference. First operand 26730 states and 39163 transitions. Second operand has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 18:17:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:17:27,973 INFO L93 Difference]: Finished difference Result 28054 states and 39925 transitions. [2022-02-23 18:17:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-23 18:17:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 207 [2022-02-23 18:17:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:17:28,043 INFO L225 Difference]: With dead ends: 28054 [2022-02-23 18:17:28,044 INFO L226 Difference]: Without dead ends: 28054 [2022-02-23 18:17:28,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3132, Invalid=5424, Unknown=0, NotChecked=0, Total=8556 [2022-02-23 18:17:28,045 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 1682 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:17:28,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 1373 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1051 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 18:17:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28054 states. [2022-02-23 18:17:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28054 to 27773. [2022-02-23 18:17:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27773 states, 17010 states have (on average 1.206466784244562) internal successors, (20522), 17319 states have internal predecessors, (20522), 9558 states have call successors, (9558), 1206 states have call predecessors, (9558), 1204 states have return successors, (9556), 9247 states have call predecessors, (9556), 9556 states have call successors, (9556) [2022-02-23 18:17:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27773 states to 27773 states and 39636 transitions. [2022-02-23 18:17:28,601 INFO L78 Accepts]: Start accepts. Automaton has 27773 states and 39636 transitions. Word has length 207 [2022-02-23 18:17:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:17:28,601 INFO L470 AbstractCegarLoop]: Abstraction has 27773 states and 39636 transitions. [2022-02-23 18:17:28,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.98) internal successors, (199), 50 states have internal predecessors, (199), 14 states have call successors, (48), 9 states have call predecessors, (48), 8 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2022-02-23 18:17:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 27773 states and 39636 transitions. [2022-02-23 18:17:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-23 18:17:28,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:17:28,630 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 15, 15, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:17:28,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-23 18:17:28,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-02-23 18:17:28,855 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:17:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:17:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -777184055, now seen corresponding path program 3 times [2022-02-23 18:17:28,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:17:28,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769908368] [2022-02-23 18:17:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:17:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:17:28,870 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:17:28,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605499007] [2022-02-23 18:17:28,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:17:28,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:17:28,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:17:28,872 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:17:28,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-23 18:18:07,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 18:18:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:18:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 65 conjunts are in the unsatisfiable core [2022-02-23 18:18:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:18:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 1955 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 18:18:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:18:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2183 backedges. 56 proven. 611 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-02-23 18:18:09,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:09,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769908368] [2022-02-23 18:18:09,201 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:09,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605499007] [2022-02-23 18:18:09,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605499007] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:18:09,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:18:09,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-02-23 18:18:09,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266431314] [2022-02-23 18:18:09,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:18:09,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 18:18:09,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 18:18:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 18:18:09,203 INFO L87 Difference]: Start difference. First operand 27773 states and 39636 transitions. Second operand has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-02-23 18:18:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:18:11,666 INFO L93 Difference]: Finished difference Result 32077 states and 45970 transitions. [2022-02-23 18:18:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 18:18:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) Word has length 268 [2022-02-23 18:18:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:18:11,731 INFO L225 Difference]: With dead ends: 32077 [2022-02-23 18:18:11,731 INFO L226 Difference]: Without dead ends: 32077 [2022-02-23 18:18:11,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 482 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3713, Invalid=6387, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 18:18:11,733 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 1596 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 1080 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1080 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:18:11,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 1221 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1080 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 18:18:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32077 states. [2022-02-23 18:18:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32077 to 31505. [2022-02-23 18:18:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31505 states, 19435 states have (on average 1.2248520710059172) internal successors, (23805), 19854 states have internal predecessors, (23805), 10749 states have call successors, (10749), 1322 states have call predecessors, (10749), 1320 states have return successors, (10747), 10328 states have call predecessors, (10747), 10747 states have call successors, (10747) [2022-02-23 18:18:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31505 states to 31505 states and 45301 transitions. [2022-02-23 18:18:12,246 INFO L78 Accepts]: Start accepts. Automaton has 31505 states and 45301 transitions. Word has length 268 [2022-02-23 18:18:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:18:12,247 INFO L470 AbstractCegarLoop]: Abstraction has 31505 states and 45301 transitions. [2022-02-23 18:18:12,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.722222222222222) internal successors, (255), 54 states have internal predecessors, (255), 18 states have call successors, (64), 11 states have call predecessors, (64), 10 states have return successors, (62), 16 states have call predecessors, (62), 17 states have call successors, (62) [2022-02-23 18:18:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 31505 states and 45301 transitions. [2022-02-23 18:18:12,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-02-23 18:18:12,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:18:12,274 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 22, 21, 13, 13, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:12,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:12,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-02-23 18:18:12,474 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:18:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:18:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2114344233, now seen corresponding path program 2 times [2022-02-23 18:18:12,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:18:12,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411084640] [2022-02-23 18:18:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:18:12,487 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:18:12,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068184788] [2022-02-23 18:18:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:18:12,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:18:12,489 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:18:12,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-23 18:18:12,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:18:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:18:12,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 91 conjunts are in the unsatisfiable core [2022-02-23 18:18:12,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:18:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 4165 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-02-23 18:18:13,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:18:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4536 backedges. 127 proven. 1285 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-02-23 18:18:14,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:14,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411084640] [2022-02-23 18:18:14,634 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:14,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068184788] [2022-02-23 18:18:14,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068184788] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:18:14,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:18:14,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-02-23 18:18:14,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233010533] [2022-02-23 18:18:14,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:18:14,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 18:18:14,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:14,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 18:18:14,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 18:18:14,637 INFO L87 Difference]: Start difference. First operand 31505 states and 45301 transitions. Second operand has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-02-23 18:18:17,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:18:17,234 INFO L93 Difference]: Finished difference Result 31206 states and 44507 transitions. [2022-02-23 18:18:17,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 18:18:17,235 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) Word has length 377 [2022-02-23 18:18:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:18:17,301 INFO L225 Difference]: With dead ends: 31206 [2022-02-23 18:18:17,301 INFO L226 Difference]: Without dead ends: 31206 [2022-02-23 18:18:17,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 700 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3724, Invalid=6376, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 18:18:17,303 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1728 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 1326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1326 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:18:17,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 1209 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1326 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 18:18:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31206 states. [2022-02-23 18:18:17,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31206 to 31069. [2022-02-23 18:18:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31069 states, 19070 states have (on average 1.207393812270582) internal successors, (23025), 19409 states have internal predecessors, (23025), 10674 states have call successors, (10674), 1326 states have call predecessors, (10674), 1324 states have return successors, (10672), 10333 states have call predecessors, (10672), 10672 states have call successors, (10672) [2022-02-23 18:18:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31069 states to 31069 states and 44371 transitions. [2022-02-23 18:18:17,890 INFO L78 Accepts]: Start accepts. Automaton has 31069 states and 44371 transitions. Word has length 377 [2022-02-23 18:18:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:18:17,891 INFO L470 AbstractCegarLoop]: Abstraction has 31069 states and 44371 transitions. [2022-02-23 18:18:17,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.907407407407407) internal successors, (319), 54 states have internal predecessors, (319), 24 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (86), 22 states have call predecessors, (86), 23 states have call successors, (86) [2022-02-23 18:18:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 31069 states and 44371 transitions. [2022-02-23 18:18:17,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-02-23 18:18:17,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:18:17,917 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 24, 24, 13, 13, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:17,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:18,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:18,123 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:18:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:18:18,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2036089593, now seen corresponding path program 3 times [2022-02-23 18:18:18,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:18:18,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531604057] [2022-02-23 18:18:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:18,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:18:18,133 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:18:18,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503578183] [2022-02-23 18:18:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:18:18,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:18,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:18:18,135 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:18:18,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-23 18:18:18,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:18:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:18:18,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-23 18:18:18,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:18:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5477 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-02-23 18:18:18,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:18:18,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:18,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531604057] [2022-02-23 18:18:18,656 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:18,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503578183] [2022-02-23 18:18:18,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503578183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:18:18,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:18:18,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:18:18,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032767284] [2022-02-23 18:18:18,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:18:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:18:18,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:18:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:18:18,658 INFO L87 Difference]: Start difference. First operand 31069 states and 44371 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:18:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:18:18,821 INFO L93 Difference]: Finished difference Result 32230 states and 46018 transitions. [2022-02-23 18:18:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:18:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 411 [2022-02-23 18:18:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:18:18,891 INFO L225 Difference]: With dead ends: 32230 [2022-02-23 18:18:18,891 INFO L226 Difference]: Without dead ends: 32194 [2022-02-23 18:18:18,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:18:18,892 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 22 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:18:18,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 247 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:18:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2022-02-23 18:18:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 31417. [2022-02-23 18:18:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31417 states, 19179 states have (on average 1.2065801136659888) internal successors, (23141), 19532 states have internal predecessors, (23141), 10880 states have call successors, (10880), 1359 states have call predecessors, (10880), 1357 states have return successors, (10878), 10525 states have call predecessors, (10878), 10878 states have call successors, (10878) [2022-02-23 18:18:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31417 states to 31417 states and 44899 transitions. [2022-02-23 18:18:19,882 INFO L78 Accepts]: Start accepts. Automaton has 31417 states and 44899 transitions. Word has length 411 [2022-02-23 18:18:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:18:19,882 INFO L470 AbstractCegarLoop]: Abstraction has 31417 states and 44899 transitions. [2022-02-23 18:18:19,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:18:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 31417 states and 44899 transitions. [2022-02-23 18:18:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2022-02-23 18:18:19,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:18:19,916 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 25, 25, 13, 13, 13, 13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:19,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:20,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-23 18:18:20,144 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:18:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:18:20,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2109653093, now seen corresponding path program 1 times [2022-02-23 18:18:20,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:18:20,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579218424] [2022-02-23 18:18:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:18:20,156 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:18:20,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262124667] [2022-02-23 18:18:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:18:20,158 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:18:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-23 18:18:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:18:20,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 97 conjunts are in the unsatisfiable core [2022-02-23 18:18:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:18:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 4994 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-02-23 18:18:21,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:18:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5573 backedges. 307 proven. 1474 refuted. 0 times theorem prover too weak. 3792 trivial. 0 not checked. [2022-02-23 18:18:22,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:18:22,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579218424] [2022-02-23 18:18:22,364 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:18:22,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262124667] [2022-02-23 18:18:22,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262124667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:18:22,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:18:22,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-02-23 18:18:22,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595257588] [2022-02-23 18:18:22,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:18:22,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-23 18:18:22,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:18:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-23 18:18:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-02-23 18:18:22,366 INFO L87 Difference]: Start difference. First operand 31417 states and 44899 transitions. Second operand has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-02-23 18:18:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:18:24,767 INFO L93 Difference]: Finished difference Result 31212 states and 44390 transitions. [2022-02-23 18:18:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-23 18:18:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) Word has length 416 [2022-02-23 18:18:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:18:24,835 INFO L225 Difference]: With dead ends: 31212 [2022-02-23 18:18:24,835 INFO L226 Difference]: Without dead ends: 31212 [2022-02-23 18:18:24,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 778 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3726, Invalid=6374, Unknown=0, NotChecked=0, Total=10100 [2022-02-23 18:18:24,837 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 1653 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:18:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 1165 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 18:18:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31212 states. [2022-02-23 18:18:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31212 to 31212. [2022-02-23 18:18:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31212 states, 19052 states have (on average 1.1945202603401217) internal successors, (22758), 19391 states have internal predecessors, (22758), 10817 states have call successors, (10817), 1344 states have call predecessors, (10817), 1342 states have return successors, (10815), 10476 states have call predecessors, (10815), 10815 states have call successors, (10815) [2022-02-23 18:18:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31212 states to 31212 states and 44390 transitions. [2022-02-23 18:18:25,491 INFO L78 Accepts]: Start accepts. Automaton has 31212 states and 44390 transitions. Word has length 416 [2022-02-23 18:18:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:18:25,491 INFO L470 AbstractCegarLoop]: Abstraction has 31212 states and 44390 transitions. [2022-02-23 18:18:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 7.166666666666667) internal successors, (387), 54 states have internal predecessors, (387), 25 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (94), 23 states have call predecessors, (94), 24 states have call successors, (94) [2022-02-23 18:18:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 31212 states and 44390 transitions. [2022-02-23 18:18:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-02-23 18:18:25,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:18:25,525 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 25, 25, 14, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:25,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:25,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-23 18:18:25,726 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:18:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:18:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1640866097, now seen corresponding path program 4 times [2022-02-23 18:18:25,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:18:25,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218922348] [2022-02-23 18:18:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:18:25,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:18:25,737 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:18:25,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002658214] [2022-02-23 18:18:25,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:18:25,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:18:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:18:25,739 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:18:25,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-23 18:18:27,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:18:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-23 18:18:27,642 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-23 18:18:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-23 18:18:28,404 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-23 18:18:28,404 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-23 18:18:28,405 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 18:18:28,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-23 18:18:28,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-02-23 18:18:28,618 INFO L732 BasicCegarLoop]: Path program histogram: [8, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:18:28,621 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 18:18:28,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:18:28 BasicIcfg [2022-02-23 18:18:28,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 18:18:28,791 INFO L158 Benchmark]: Toolchain (without parser) took 495385.37ms. Allocated memory was 179.3MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 126.2MB in the beginning and 631.6MB in the end (delta: -505.4MB). Peak memory consumption was 532.7MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,792 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 18:18:28,792 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.04ms. Allocated memory was 179.3MB in the beginning and 281.0MB in the end (delta: 101.7MB). Free memory was 126.0MB in the beginning and 252.7MB in the end (delta: -126.7MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,792 INFO L158 Benchmark]: Boogie Preprocessor took 29.64ms. Allocated memory is still 281.0MB. Free memory was 252.7MB in the beginning and 251.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,792 INFO L158 Benchmark]: RCFGBuilder took 243.52ms. Allocated memory is still 281.0MB. Free memory was 251.1MB in the beginning and 239.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,792 INFO L158 Benchmark]: IcfgTransformer took 34.38ms. Allocated memory is still 281.0MB. Free memory was 239.6MB in the beginning and 238.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,793 INFO L158 Benchmark]: TraceAbstraction took 494814.82ms. Allocated memory was 281.0MB in the beginning and 1.2GB in the end (delta: 936.4MB). Free memory was 237.5MB in the beginning and 631.6MB in the end (delta: -394.1MB). Peak memory consumption was 542.7MB. Max. memory is 8.0GB. [2022-02-23 18:18:28,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 179.3MB. Free memory is still 142.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 255.04ms. Allocated memory was 179.3MB in the beginning and 281.0MB in the end (delta: 101.7MB). Free memory was 126.0MB in the beginning and 252.7MB in the end (delta: -126.7MB). Peak memory consumption was 8.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.64ms. Allocated memory is still 281.0MB. Free memory was 252.7MB in the beginning and 251.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 243.52ms. Allocated memory is still 281.0MB. Free memory was 251.1MB in the beginning and 239.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 34.38ms. Allocated memory is still 281.0MB. Free memory was 239.6MB in the beginning and 238.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 494814.82ms. Allocated memory was 281.0MB in the beginning and 1.2GB in the end (delta: 936.4MB). Free memory was 237.5MB in the beginning and 631.6MB in the end (delta: -394.1MB). Peak memory consumption was 542.7MB. 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)=53, 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=377, y=610] [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=377, y=610] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [\old(counter)=0, a=377, b=610, counter=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=610, c=377, counter=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=610, c=377, counter=2, k=0, p=1, q=0, r=0, s=1, x=377, y=610] [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=610, b=377, c=377, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=377, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=610, b=377, c=610, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=610, b=377, c=610, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L48] COND TRUE counter++<50 [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=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [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=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [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=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [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=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=610, b=377, c=610, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=610, b=377, c=233, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=610, b=377, c=233, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=377, x=377, y=610] [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=377, b=233, c=233, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=233, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=377, b=233, c=377, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=377, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=377, b=233, c=377, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=377, b=233, c=377, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=377, b=233, c=144, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=377, b=233, c=144, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=233, x=377, y=610] [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=233, b=144, c=144, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=144, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=233, b=144, c=233, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=233, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=233, b=144, c=233, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=233, b=144, c=233, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=233, b=144, c=89, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=233, b=144, c=89, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=144, x=377, y=610] [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=144, b=89, c=89, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=89, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=144, b=89, c=144, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=144, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=144, b=89, c=144, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=144, b=89, c=144, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=144, b=89, c=55, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=144, b=89, c=55, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=89, x=377, y=610] [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=89, b=55, c=55, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=55, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=89, b=55, c=89, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=89, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=89, b=55, c=89, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=21] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=21] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=89, b=55, c=89, counter=21, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=89, b=55, c=34, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=89, b=55, c=34, counter=22, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=55, x=377, y=610] [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=55, b=34, c=34, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=34, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=55, b=34, c=55, counter=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, counter++=23, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=55, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=55, b=34, c=55, counter=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, counter++=24, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=25] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=25] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=55, b=34, c=55, counter=25, d=1, k=0, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=55, b=34, c=21, counter=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, counter++=25, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=55, b=34, c=21, counter=26, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=34, x=377, y=610] [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=34, b=21, c=21, counter=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=21, counter=27, counter++=26, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=34, b=21, c=34, counter=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, counter++=27, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=34, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=34, b=21, c=34, counter=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, counter++=28, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=29] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=29] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=34, b=21, c=34, counter=29, d=1, k=0, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=34, b=21, c=13, counter=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, counter++=29, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=34, b=21, c=13, counter=30, d=1, k=1, p=-8, q=13, r=5, s=-8, temp=-3, v=21, x=377, y=610] [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=21, b=13, c=13, counter=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=13, counter=31, counter++=30, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=21, b=13, c=21, counter=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, counter++=31, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=21, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=21, b=13, c=21, counter=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, counter++=32, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=33] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=33] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=21, b=13, c=21, counter=33, d=1, k=0, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=21, b=13, c=8, counter=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, counter++=33, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=21, b=13, c=8, counter=34, d=1, k=1, p=13, q=-21, r=-8, s=13, temp=5, v=13, x=377, y=610] [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=13, b=8, c=8, counter=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=8, counter=35, counter++=34, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=13, b=8, c=13, counter=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, counter++=35, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=13, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=13, b=8, c=13, counter=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, counter++=36, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=37] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=37] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=13, b=8, c=13, counter=37, d=1, k=0, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=13, b=8, c=5, counter=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, counter++=37, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=13, b=8, c=5, counter=38, d=1, k=1, p=-21, q=34, r=13, s=-21, temp=-8, v=8, x=377, y=610] [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=8, b=5, c=5, counter=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=5, counter=39, counter++=38, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=8, b=5, c=8, counter=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, counter++=39, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=8, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=8, b=5, c=8, counter=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, counter++=40, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=41] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=41] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=8, b=5, c=8, counter=41, d=1, k=0, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=8, b=5, c=3, counter=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, counter++=41, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=8, b=5, c=3, counter=42, d=1, k=1, p=34, q=-55, r=-21, s=34, temp=13, v=5, x=377, y=610] [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=5, b=3, c=3, counter=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=3, counter=43, counter++=42, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L34] COND TRUE counter++<50 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [\old(counter)=0, a=5, b=3, c=5, counter=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, counter++=43, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=5, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [\old(counter)=0, a=5, b=3, c=5, counter=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, counter++=44, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=45] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=45] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=5, b=3, c=5, counter=45, d=1, k=0, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=5, b=3, c=2, counter=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, counter++=45, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=5, b=3, c=2, counter=46, d=1, k=1, p=-55, q=89, r=34, s=-55, temp=-21, v=3, x=377, y=610] [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=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=2, counter=47, counter++=46, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L34] COND TRUE counter++<50 [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=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=48, counter++=47, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=3, x=377, y=610] [L41] COND TRUE counter++<50 [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=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, counter++=48, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L48] COND TRUE counter++<50 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, \old(counter)=0, counter=49] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=49] [L52] RET __VERIFIER_assert(v == b * d) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L54] COND TRUE !(c >= 2 * v) VAL [\old(counter)=0, a=3, b=2, c=3, counter=49, d=1, k=0, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L59] c = c - v [L60] k = k + d VAL [\old(counter)=0, a=3, b=2, c=1, counter=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] EXPR counter++ VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, counter++=49, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [L41] COND TRUE counter++<50 [L42] COND TRUE !(c >= b) VAL [\old(counter)=0, a=3, b=2, c=1, counter=50, d=1, k=1, p=89, q=-144, r=-55, s=89, temp=34, v=2, x=377, y=610] [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=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] EXPR counter++ VAL [\old(counter)=0, a=2, b=1, c=1, counter=51, counter++=50, d=1, k=1, p=-144, q=233, r=89, s=-144, temp=-55, v=2, x=377, y=610] [L34] COND FALSE !(counter++<50) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, \old(counter)=0, counter=51] [L11] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] [L13] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 494.6s, OverallIterations: 40, TraceHistogramMax: 49, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.3s, AutomataDifference: 361.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 33 mSolverCounterUnknown, 14203 SdHoareTripleChecker+Valid, 176.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14060 mSDsluCounter, 25695 SdHoareTripleChecker+Invalid, 173.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22191 mSDsCounter, 10578 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23278 IncrementalHoareTripleChecker+Invalid, 33889 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10578 mSolverCounterUnsat, 3504 mSDtfsCounter, 23278 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8261 GetRequests, 6852 SyntacticMatches, 33 SemanticMatches, 1376 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20503 ImplicationChecksByTransitivity, 218.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31505occurred in iteration=36, InterpolantAutomatonStates: 1239, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 7.9s AutomataMinimizationTime, 39 MinimizatonAttempts, 19235 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 42.2s SatisfiabilityAnalysisTime, 72.0s InterpolantComputationTime, 4790 NumberOfCodeBlocks, 4290 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 7382 ConstructedInterpolants, 0 QuantifiedInterpolants, 37030 SizeOfPredicates, 419 NumberOfNonLiveVariables, 11454 ConjunctsInSsa, 1498 ConjunctsInUnsatCore, 63 InterpolantComputations, 13 PerfectInterpolantSequences, 27877/46851 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 18:18:28,935 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...