/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 07:03:23,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 07:03:23,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 07:03:23,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 07:03:23,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 07:03:23,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 07:03:23,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 07:03:23,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 07:03:23,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 07:03:23,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 07:03:23,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 07:03:23,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 07:03:23,587 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 07:03:23,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 07:03:23,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 07:03:23,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 07:03:23,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 07:03:23,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 07:03:23,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 07:03:23,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 07:03:23,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 07:03:23,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 07:03:23,622 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 07:03:23,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 07:03:23,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 07:03:23,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 07:03:23,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 07:03:23,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 07:03:23,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 07:03:23,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 07:03:23,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 07:03:23,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 07:03:23,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 07:03:23,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 07:03:23,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:03:23,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 07:03:23,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 07:03:23,628 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 07:03:23,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 07:03:23,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 07:03:23,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 07:03:23,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 07:03:23,876 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 07:03:23,878 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 07:03:23,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-04-06 07:03:23,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab43d234/53305b397e2945388640fb476b8f493b/FLAG55d679c4e [2022-04-06 07:03:24,325 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 07:03:24,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2022-04-06 07:03:24,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab43d234/53305b397e2945388640fb476b8f493b/FLAG55d679c4e [2022-04-06 07:03:24,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ab43d234/53305b397e2945388640fb476b8f493b [2022-04-06 07:03:24,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 07:03:24,348 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 07:03:24,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 07:03:24,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 07:03:24,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 07:03:24,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad656a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24, skipping insertion in model container [2022-04-06 07:03:24,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 07:03:24,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 07:03:24,522 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-04-06 07:03:24,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:03:24,553 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 07:03:24,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c[538,551] [2022-04-06 07:03:24,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 07:03:24,603 INFO L208 MainTranslator]: Completed translation [2022-04-06 07:03:24,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24 WrapperNode [2022-04-06 07:03:24,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 07:03:24,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 07:03:24,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 07:03:24,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 07:03:24,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 07:03:24,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 07:03:24,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 07:03:24,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 07:03:24,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 07:03:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:24,679 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) [2022-04-06 07:03:24,697 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 [2022-04-06 07:03:24,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 07:03:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 07:03:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 07:03:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 07:03:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 07:03:24,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 07:03:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 07:03:24,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 07:03:24,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 07:03:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 07:03:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 07:03:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 07:03:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 07:03:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 07:03:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 07:03:24,754 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 07:03:24,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 07:03:24,900 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 07:03:24,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 07:03:24,904 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 07:03:24,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:03:24 BoogieIcfgContainer [2022-04-06 07:03:24,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 07:03:24,906 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 07:03:24,907 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 07:03:24,913 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 07:03:24,929 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:03:24" (1/1) ... [2022-04-06 07:03:24,931 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 07:03:24,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:03:24 BasicIcfg [2022-04-06 07:03:24,947 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 07:03:24,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 07:03:24,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 07:03:24,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 07:03:24,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:03:24" (1/4) ... [2022-04-06 07:03:24,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66006676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:03:24, skipping insertion in model container [2022-04-06 07:03:24,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:03:24" (2/4) ... [2022-04-06 07:03:24,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66006676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:03:24, skipping insertion in model container [2022-04-06 07:03:24,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:03:24" (3/4) ... [2022-04-06 07:03:24,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66006676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 07:03:24, skipping insertion in model container [2022-04-06 07:03:24,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 07:03:24" (4/4) ... [2022-04-06 07:03:24,952 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.cJordan [2022-04-06 07:03:24,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 07:03:24,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 07:03:24,990 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 07:03:24,994 INFO L340 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 [2022-04-06 07:03:24,994 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 07:03:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 07:03:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 07:03:25,011 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:25,011 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:25,011 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2022-04-06 07:03:25,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:25,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912509496] [2022-04-06 07:03:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:25,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:03:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:03:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 07:03:25,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912509496] [2022-04-06 07:03:25,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912509496] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:25,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:25,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 07:03:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287121153] [2022-04-06 07:03:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:25,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 07:03:25,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 07:03:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:03:25,246 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 07:03:25,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:25,319 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 07:03:25,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 07:03:25,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 07:03:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:25,327 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:03:25,327 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 07:03:25,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 07:03:25,333 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:25,333 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 07:03:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 07:03:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 07:03:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 07:03:25,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-04-06 07:03:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:25,360 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 07:03:25,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 07:03:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 07:03:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 07:03:25,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:25,362 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:25,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 07:03:25,362 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:25,363 INFO L85 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2022-04-06 07:03:25,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565231683] [2022-04-06 07:03:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:03:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:03:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 07:03:25,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:25,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565231683] [2022-04-06 07:03:25,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565231683] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:25,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:25,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:03:25,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944582872] [2022-04-06 07:03:25,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:25,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:03:25,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:25,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:03:25,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:03:25,485 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 07:03:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:25,646 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-04-06 07:03:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 07:03:25,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-06 07:03:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:25,647 INFO L225 Difference]: With dead ends: 45 [2022-04-06 07:03:25,647 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 07:03:25,648 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:03:25,648 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:25,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 90 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 07:03:25,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-04-06 07:03:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 07:03:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-04-06 07:03:25,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2022-04-06 07:03:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:25,667 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-04-06 07:03:25,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 07:03:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-04-06 07:03:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 07:03:25,667 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:25,667 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:25,668 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 07:03:25,668 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:25,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2022-04-06 07:03:25,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:25,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322569803] [2022-04-06 07:03:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:25,692 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:25,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112673489] [2022-04-06 07:03:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:25,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:25,715 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) [2022-04-06 07:03:25,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 07:03:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:25,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 07:03:25,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 07:03:25,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:03:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322569803] [2022-04-06 07:03:25,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112673489] [2022-04-06 07:03:25,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112673489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:25,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:25,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 07:03:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760461786] [2022-04-06 07:03:25,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:25,864 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 07:03:25,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:25,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 07:03:25,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 07:03:25,865 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 07:03:25,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:25,879 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-04-06 07:03:25,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 07:03:25,881 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-06 07:03:25,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:25,882 INFO L225 Difference]: With dead ends: 38 [2022-04-06 07:03:25,882 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 07:03:25,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 07:03:25,883 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:25,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:03:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 07:03:25,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 07:03:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 07:03:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2022-04-06 07:03:25,888 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2022-04-06 07:03:25,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:25,888 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2022-04-06 07:03:25,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 07:03:25,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2022-04-06 07:03:25,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 07:03:25,889 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:25,889 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:25,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:26,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:26,090 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2022-04-06 07:03:26,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406351975] [2022-04-06 07:03:26,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 07:03:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 07:03:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-04-06 07:03:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 07:03:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406351975] [2022-04-06 07:03:26,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406351975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:26,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:26,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:03:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486037451] [2022-04-06 07:03:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:26,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:03:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:03:26,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:03:26,220 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 07:03:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:26,358 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-04-06 07:03:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 07:03:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-06 07:03:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:26,361 INFO L225 Difference]: With dead ends: 50 [2022-04-06 07:03:26,361 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 07:03:26,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:03:26,379 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:26,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:26,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 07:03:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-04-06 07:03:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 07:03:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-04-06 07:03:26,385 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2022-04-06 07:03:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:26,385 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-04-06 07:03:26,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 07:03:26,385 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-04-06 07:03:26,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 07:03:26,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:26,386 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:26,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 07:03:26,386 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:26,387 INFO L85 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2022-04-06 07:03:26,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:26,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135062988] [2022-04-06 07:03:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:26,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:26,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:26,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40256092] [2022-04-06 07:03:26,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:26,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:26,396 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) [2022-04-06 07:03:26,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 07:03:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:03:26,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 07:03:26,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:03:26,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:26,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135062988] [2022-04-06 07:03:26,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:26,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40256092] [2022-04-06 07:03:26,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40256092] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:26,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:26,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:03:26,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506282879] [2022-04-06 07:03:26,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:26,538 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:03:26,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:03:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:03:26,538 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:03:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:26,581 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-04-06 07:03:26,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:03:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-06 07:03:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:26,583 INFO L225 Difference]: With dead ends: 57 [2022-04-06 07:03:26,583 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 07:03:26,583 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:03:26,584 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:26,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:03:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 07:03:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 07:03:26,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 07:03:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2022-04-06 07:03:26,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2022-04-06 07:03:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:26,597 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2022-04-06 07:03:26,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 07:03:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2022-04-06 07:03:26,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 07:03:26,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:26,598 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:26,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:26,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:26,816 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2022-04-06 07:03:26,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:26,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798070476] [2022-04-06 07:03:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:26,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:26,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:26,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7591354] [2022-04-06 07:03:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:26,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:26,829 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) [2022-04-06 07:03:26,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 07:03:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:26,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:03:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:03:26,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:03:26,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:26,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798070476] [2022-04-06 07:03:26,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:26,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7591354] [2022-04-06 07:03:26,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7591354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:26,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:26,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:03:26,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002378144] [2022-04-06 07:03:26,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:26,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:03:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:03:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:03:26,982 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 07:03:27,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:27,005 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-04-06 07:03:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:03:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-06 07:03:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:27,008 INFO L225 Difference]: With dead ends: 69 [2022-04-06 07:03:27,008 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 07:03:27,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:03:27,010 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:27,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 117 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:03:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 07:03:27,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 07:03:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 07:03:27,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2022-04-06 07:03:27,022 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2022-04-06 07:03:27,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:27,022 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2022-04-06 07:03:27,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-06 07:03:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2022-04-06 07:03:27,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 07:03:27,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:27,024 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:27,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:27,224 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:27,225 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:27,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2022-04-06 07:03:27,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804282564] [2022-04-06 07:03:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:27,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:27,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905280688] [2022-04-06 07:03:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:27,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:27,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:27,240 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) [2022-04-06 07:03:27,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 07:03:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:27,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 07:03:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:03:27,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:03:27,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804282564] [2022-04-06 07:03:27,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:27,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905280688] [2022-04-06 07:03:27,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905280688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:03:27,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:03:27,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 07:03:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490062750] [2022-04-06 07:03:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:27,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 07:03:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 07:03:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 07:03:27,465 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 07:03:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:27,548 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-04-06 07:03:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 07:03:27,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 07:03:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:27,550 INFO L225 Difference]: With dead ends: 72 [2022-04-06 07:03:27,550 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 07:03:27,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 07:03:27,551 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:27,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 07:03:27,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 07:03:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 07:03:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2022-04-06 07:03:27,555 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2022-04-06 07:03:27,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:27,555 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2022-04-06 07:03:27,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 07:03:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2022-04-06 07:03:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 07:03:27,556 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:27,556 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:27,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:27,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:27,780 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2022-04-06 07:03:27,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:27,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237386049] [2022-04-06 07:03:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:27,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:27,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406829033] [2022-04-06 07:03:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:27,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:27,796 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) [2022-04-06 07:03:27,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 07:03:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:27,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:03:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:27,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:03:27,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:03:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 07:03:28,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237386049] [2022-04-06 07:03:28,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:28,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406829033] [2022-04-06 07:03:28,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406829033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:03:28,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:03:28,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 07:03:28,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650820961] [2022-04-06 07:03:28,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:03:28,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 07:03:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:28,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 07:03:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 07:03:28,046 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 07:03:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:28,151 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-04-06 07:03:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 07:03:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2022-04-06 07:03:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:28,153 INFO L225 Difference]: With dead ends: 109 [2022-04-06 07:03:28,153 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 07:03:28,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:03:28,154 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:28,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 07:03:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2022-04-06 07:03:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 07:03:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 120 transitions. [2022-04-06 07:03:28,161 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 120 transitions. Word has length 38 [2022-04-06 07:03:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:28,161 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 120 transitions. [2022-04-06 07:03:28,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-04-06 07:03:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 120 transitions. [2022-04-06 07:03:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 07:03:28,162 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:28,162 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:03:28,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:28,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:28,367 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:28,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2022-04-06 07:03:28,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:28,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107040431] [2022-04-06 07:03:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:28,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:28,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:28,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122453265] [2022-04-06 07:03:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:28,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:28,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:28,378 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) [2022-04-06 07:03:28,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 07:03:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 07:03:28,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 07:03:28,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:03:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 07:03:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107040431] [2022-04-06 07:03:28,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122453265] [2022-04-06 07:03:28,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122453265] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 07:03:28,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:03:28,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 07:03:28,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358897494] [2022-04-06 07:03:28,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:03:28,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:03:28,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:28,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:03:28,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:03:28,774 INFO L87 Difference]: Start difference. First operand 103 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2022-04-06 07:03:28,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:28,822 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2022-04-06 07:03:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:03:28,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 46 [2022-04-06 07:03:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:28,823 INFO L225 Difference]: With dead ends: 118 [2022-04-06 07:03:28,824 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 07:03:28,824 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:03:28,824 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:28,825 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 125 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:03:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 07:03:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2022-04-06 07:03:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 76 states have internal predecessors, (85), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 07:03:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2022-04-06 07:03:28,830 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 46 [2022-04-06 07:03:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:28,831 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2022-04-06 07:03:28,831 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2022-04-06 07:03:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2022-04-06 07:03:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 07:03:28,832 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:28,832 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 07:03:28,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:29,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:29,056 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2022-04-06 07:03:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:29,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948462556] [2022-04-06 07:03:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:29,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:29,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1929061186] [2022-04-06 07:03:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:29,070 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) [2022-04-06 07:03:29,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 07:03:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 07:03:29,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 07:03:29,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:03:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 07:03:29,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948462556] [2022-04-06 07:03:29,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929061186] [2022-04-06 07:03:29,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929061186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:03:29,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:03:29,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-06 07:03:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316651737] [2022-04-06 07:03:29,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:03:29,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 07:03:29,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:29,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 07:03:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:03:29,311 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 07:03:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:29,445 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-04-06 07:03:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 07:03:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2022-04-06 07:03:29,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:29,450 INFO L225 Difference]: With dead ends: 193 [2022-04-06 07:03:29,450 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 07:03:29,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-04-06 07:03:29,451 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 107 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:29,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 222 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:03:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 07:03:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 186. [2022-04-06 07:03:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 125 states have internal predecessors, (139), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 07:03:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 220 transitions. [2022-04-06 07:03:29,469 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 220 transitions. Word has length 54 [2022-04-06 07:03:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:29,469 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 220 transitions. [2022-04-06 07:03:29,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 07:03:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 220 transitions. [2022-04-06 07:03:29,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 07:03:29,470 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:29,470 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 07:03:29,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:29,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:29,693 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:29,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2022-04-06 07:03:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:29,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989388734] [2022-04-06 07:03:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:29,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:29,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065239465] [2022-04-06 07:03:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:29,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:29,709 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) [2022-04-06 07:03:29,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 07:03:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:29,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 07:03:29,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 07:03:30,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:03:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 07:03:30,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:03:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989388734] [2022-04-06 07:03:30,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:03:30,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065239465] [2022-04-06 07:03:30,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065239465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:03:30,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:03:30,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 07:03:30,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101406161] [2022-04-06 07:03:30,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:03:30,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 07:03:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:03:30,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 07:03:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 07:03:30,298 INFO L87 Difference]: Start difference. First operand 186 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:03:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:03:30,561 INFO L93 Difference]: Finished difference Result 266 states and 335 transitions. [2022-04-06 07:03:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 07:03:30,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 54 [2022-04-06 07:03:30,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:03:30,564 INFO L225 Difference]: With dead ends: 266 [2022-04-06 07:03:30,564 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 07:03:30,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-04-06 07:03:30,564 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:03:30,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 247 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 07:03:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 07:03:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 239. [2022-04-06 07:03:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 163 states have internal predecessors, (189), 56 states have call successors, (56), 29 states have call predecessors, (56), 27 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-04-06 07:03:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 296 transitions. [2022-04-06 07:03:30,574 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 296 transitions. Word has length 54 [2022-04-06 07:03:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:03:30,575 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 296 transitions. [2022-04-06 07:03:30,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:03:30,577 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 296 transitions. [2022-04-06 07:03:30,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 07:03:30,583 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:03:30,583 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2022-04-06 07:03:30,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 07:03:30,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 07:03:30,800 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:03:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:03:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2022-04-06 07:03:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:03:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732573193] [2022-04-06 07:03:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:03:30,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:03:30,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125875428] [2022-04-06 07:03:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:03:30,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:03:30,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:03:30,811 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) [2022-04-06 07:03:30,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 07:03:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:03:30,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 07:03:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:03:31,622 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 07:03:31,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:04:00,809 WARN L232 SmtUtils]: Spent 17.97s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:05:14,254 WARN L232 SmtUtils]: Spent 18.99s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:06:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 07:06:17,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:06:17,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732573193] [2022-04-06 07:06:17,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:06:17,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125875428] [2022-04-06 07:06:17,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125875428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:06:17,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:06:17,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 07:06:17,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057815585] [2022-04-06 07:06:17,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:06:17,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 07:06:17,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:06:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 07:06:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=270, Unknown=2, NotChecked=0, Total=342 [2022-04-06 07:06:17,540 INFO L87 Difference]: Start difference. First operand 239 states and 296 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 07:06:19,570 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 [] [2022-04-06 07:06:21,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:22,745 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:25,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:27,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:29,500 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:31,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:34,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:36,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:48,431 WARN L232 SmtUtils]: Spent 11.63s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:06:50,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:51,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:54,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:56,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:06:58,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:00,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:02,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:05,581 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:07,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:10,121 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:12,427 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse12 (mod c_main_~B~0 4294967296))) (let ((.cse2 (mod c_main_~A~0 4294967296)) (.cse0 (<= c_main_~d~0 c_main_~r~0)) (.cse1 (* c_main_~p~0 .cse12))) (and (or .cse0 (not (= c_main_~d~0 .cse1)) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse7 (* (+ c_main_~q~0 .cse11) .cse12)) (.cse8 (not .cse5)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse4 (* (+ c_main_~q~0 .cse11 1) .cse12)) (.cse10 (= (mod c_main_~d~0 2) 0)) (.cse9 (< c_main_~d~0 0))) (and (or (let ((.cse6 (< c_main_~p~0 0))) (and (or (= .cse2 (+ c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse6)) (or (= .cse2 (+ .cse7 c_main_~r~0 .cse3)) (and .cse8 .cse6)))) (and .cse9 (not .cse10))) (or (and (or (= .cse2 (+ (- 1) .cse7 c_main_~r~0 .cse3)) .cse8) (or .cse5 (= .cse2 (+ (- 1) c_main_~r~0 .cse3 .cse4)))) .cse10 (not .cse9)))))) (let ((.cse13 (* 2 c_main_~p~0))) (let ((.cse14 (* .cse13 .cse12))) (or (= .cse2 (+ (* (+ c_main_~q~0 (div .cse13 2)) .cse12) (* (- 1) (div .cse14 2)) c_main_~r~0)) (not (= .cse14 (* 2 c_main_~d~0))) (not .cse0) (<= (* 2 .cse1) c_main_~r~0))))))) is different from true [2022-04-06 07:07:14,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:17,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 07:07:18,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:07:18,435 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2022-04-06 07:07:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 07:07:18,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 68 [2022-04-06 07:07:18,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:07:18,437 INFO L225 Difference]: With dead ends: 286 [2022-04-06 07:07:18,437 INFO L226 Difference]: Without dead ends: 286 [2022-04-06 07:07:18,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=129, Invalid=522, Unknown=3, NotChecked=48, Total=702 [2022-04-06 07:07:18,438 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 123 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 46.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:07:18,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 293 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 606 Invalid, 16 Unknown, 8 Unchecked, 46.1s Time] [2022-04-06 07:07:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-04-06 07:07:18,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 252. [2022-04-06 07:07:18,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 176 states have internal predecessors, (200), 53 states have call successors, (53), 31 states have call predecessors, (53), 30 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-04-06 07:07:18,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 302 transitions. [2022-04-06 07:07:18,446 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 302 transitions. Word has length 68 [2022-04-06 07:07:18,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:07:18,446 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 302 transitions. [2022-04-06 07:07:18,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 07:07:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 302 transitions. [2022-04-06 07:07:18,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 07:07:18,447 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:07:18,447 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-04-06 07:07:18,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 07:07:18,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:18,647 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:07:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:07:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2022-04-06 07:07:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:07:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743950259] [2022-04-06 07:07:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:07:18,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:07:18,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1601987830] [2022-04-06 07:07:18,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:18,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:07:18,655 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) [2022-04-06 07:07:18,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 07:07:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:07:18,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 07:07:18,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:07:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 07:07:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:07:21,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:07:21,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743950259] [2022-04-06 07:07:21,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:07:21,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601987830] [2022-04-06 07:07:21,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601987830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 07:07:21,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 07:07:21,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 07:07:21,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458315070] [2022-04-06 07:07:21,964 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-06 07:07:21,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 07:07:21,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:07:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 07:07:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 07:07:21,965 INFO L87 Difference]: Start difference. First operand 252 states and 302 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 07:07:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:07:22,980 INFO L93 Difference]: Finished difference Result 289 states and 350 transitions. [2022-04-06 07:07:22,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 07:07:22,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2022-04-06 07:07:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:07:22,985 INFO L225 Difference]: With dead ends: 289 [2022-04-06 07:07:22,985 INFO L226 Difference]: Without dead ends: 287 [2022-04-06 07:07:22,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-04-06 07:07:22,993 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 32 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 07:07:22,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 290 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 07:07:22,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-04-06 07:07:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 268. [2022-04-06 07:07:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 178 states have (on average 1.1797752808988764) internal successors, (210), 186 states have internal predecessors, (210), 57 states have call successors, (57), 34 states have call predecessors, (57), 32 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2022-04-06 07:07:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 320 transitions. [2022-04-06 07:07:23,012 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 320 transitions. Word has length 79 [2022-04-06 07:07:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:07:23,013 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 320 transitions. [2022-04-06 07:07:23,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 07:07:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 320 transitions. [2022-04-06 07:07:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 07:07:23,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:07:23,014 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2022-04-06 07:07:23,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 07:07:23,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 07:07:23,229 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:07:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:07:23,230 INFO L85 PathProgramCache]: Analyzing trace with hash -911798983, now seen corresponding path program 2 times [2022-04-06 07:07:23,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:07:23,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86076464] [2022-04-06 07:07:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:23,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:07:23,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:07:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474253352] [2022-04-06 07:07:23,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 07:07:23,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:23,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:07:23,243 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) [2022-04-06 07:07:23,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 07:07:23,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 07:07:23,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 07:07:23,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 07:07:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:07:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 07:07:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:07:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 07:07:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:07:23,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86076464] [2022-04-06 07:07:23,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:07:23,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474253352] [2022-04-06 07:07:23,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474253352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:07:23,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:07:23,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-04-06 07:07:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099747832] [2022-04-06 07:07:23,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:07:23,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:07:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:07:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:07:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:07:23,527 INFO L87 Difference]: Start difference. First operand 268 states and 320 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 07:07:23,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:07:23,595 INFO L93 Difference]: Finished difference Result 261 states and 308 transitions. [2022-04-06 07:07:23,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 07:07:23,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2022-04-06 07:07:23,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:07:23,596 INFO L225 Difference]: With dead ends: 261 [2022-04-06 07:07:23,597 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 07:07:23,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:07:23,597 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 07:07:23,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 133 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 07:07:23,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 07:07:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2022-04-06 07:07:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 166 states have (on average 1.1686746987951808) internal successors, (194), 171 states have internal predecessors, (194), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (48), 44 states have call predecessors, (48), 48 states have call successors, (48) [2022-04-06 07:07:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 293 transitions. [2022-04-06 07:07:23,603 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 293 transitions. Word has length 82 [2022-04-06 07:07:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:07:23,604 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 293 transitions. [2022-04-06 07:07:23,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-04-06 07:07:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 293 transitions. [2022-04-06 07:07:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 07:07:23,604 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:07:23,605 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1] [2022-04-06 07:07:23,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 07:07:23,820 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 07:07:23,820 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:07:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:07:23,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1053492757, now seen corresponding path program 1 times [2022-04-06 07:07:23,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:07:23,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133852454] [2022-04-06 07:07:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:23,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:07:23,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:07:23,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210087943] [2022-04-06 07:07:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:23,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:07:23,832 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) [2022-04-06 07:07:23,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 07:07:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:07:23,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 07:07:23,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:07:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 07:07:24,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:07:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 07:07:24,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:07:24,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133852454] [2022-04-06 07:07:24,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:07:24,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210087943] [2022-04-06 07:07:24,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210087943] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 07:07:24,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 07:07:24,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 07:07:24,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127352017] [2022-04-06 07:07:24,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-06 07:07:24,436 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 07:07:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:07:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 07:07:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 07:07:24,437 INFO L87 Difference]: Start difference. First operand 248 states and 293 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-06 07:07:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:07:24,656 INFO L93 Difference]: Finished difference Result 252 states and 297 transitions. [2022-04-06 07:07:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 07:07:24,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 84 [2022-04-06 07:07:24,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:07:24,658 INFO L225 Difference]: With dead ends: 252 [2022-04-06 07:07:24,658 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 07:07:24,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 07:07:24,658 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 07:07:24,659 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 220 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 07:07:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 07:07:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2022-04-06 07:07:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 153 states have (on average 1.1764705882352942) internal successors, (180), 158 states have internal predecessors, (180), 47 states have call successors, (47), 30 states have call predecessors, (47), 28 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 07:07:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 271 transitions. [2022-04-06 07:07:24,663 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 271 transitions. Word has length 84 [2022-04-06 07:07:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:07:24,664 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 271 transitions. [2022-04-06 07:07:24,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 8 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-04-06 07:07:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 271 transitions. [2022-04-06 07:07:24,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 07:07:24,664 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:07:24,664 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:07:24,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 07:07:24,876 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 07:07:24,877 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:07:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:07:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash -883405496, now seen corresponding path program 1 times [2022-04-06 07:07:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:07:24,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472836016] [2022-04-06 07:07:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:24,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:07:24,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:07:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561942942] [2022-04-06 07:07:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:24,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:07:24,894 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) [2022-04-06 07:07:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 07:07:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 07:07:24,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 07:07:24,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:07:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-06 07:07:25,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 07:07:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 07:07:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472836016] [2022-04-06 07:07:25,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 07:07:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561942942] [2022-04-06 07:07:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561942942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 07:07:25,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 07:07:25,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 07:07:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428984097] [2022-04-06 07:07:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 07:07:25,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 07:07:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 07:07:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 07:07:25,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:07:25,056 INFO L87 Difference]: Start difference. First operand 229 states and 271 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:07:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 07:07:25,095 INFO L93 Difference]: Finished difference Result 228 states and 267 transitions. [2022-04-06 07:07:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 07:07:25,095 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 88 [2022-04-06 07:07:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 07:07:25,096 INFO L225 Difference]: With dead ends: 228 [2022-04-06 07:07:25,096 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 07:07:25,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-04-06 07:07:25,097 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 17 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 07:07:25,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 127 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 07:07:25,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 07:07:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 218. [2022-04-06 07:07:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 150 states have internal predecessors, (167), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-06 07:07:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 251 transitions. [2022-04-06 07:07:25,103 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 251 transitions. Word has length 88 [2022-04-06 07:07:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 07:07:25,103 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 251 transitions. [2022-04-06 07:07:25,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-04-06 07:07:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 251 transitions. [2022-04-06 07:07:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 07:07:25,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 07:07:25,104 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 07:07:25,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 07:07:25,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 07:07:25,319 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 07:07:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 07:07:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2022-04-06 07:07:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 07:07:25,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620842109] [2022-04-06 07:07:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 07:07:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 07:07:25,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 07:07:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511433095] [2022-04-06 07:07:25,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-06 07:07:25,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 07:07:25,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 07:07:25,338 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) [2022-04-06 07:07:25,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 07:07:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-06 07:07:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 07:07:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 07:07:25,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 07:07:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 61 proven. 31 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 07:07:26,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 07:08:07,143 WARN L232 SmtUtils]: Spent 21.62s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 07:09:01,566 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse11 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse0 (+ c_main_~q~0 c_main_~p~0 .cse11))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) (div c_main_~d~0 2))) (.cse7 (not .cse5))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))))) is different from true [2022-04-06 07:10:41,326 WARN L232 SmtUtils]: Spent 46.08s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)