/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 17:03:43,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 17:03:43,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 17:03:43,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 17:03:43,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 17:03:43,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 17:03:43,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 17:03:43,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 17:03:43,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 17:03:43,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 17:03:43,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 17:03:43,602 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 17:03:43,603 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 17:03:43,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 17:03:43,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 17:03:43,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 17:03:43,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 17:03:43,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 17:03:43,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 17:03:43,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 17:03:43,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 17:03:43,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 17:03:43,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 17:03:43,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 17:03:43,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 17:03:43,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 17:03:43,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 17:03:43,632 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 17:03:43,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 17:03:43,632 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 17:03:43,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 17:03:43,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 17:03:43,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 17:03:43,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 17:03:43,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 17:03:43,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:03:43,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 17:03:43,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 17:03:43,634 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 17:03:43,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 17:03:43,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 17:03:43,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 17:03:43,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 17:03:43,832 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 17:03:43,832 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 17:03:43,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-17 17:03:43,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b2251/4a9d7f759d7046ddbdc54a5f05badcde/FLAGf6fd6df31 [2022-03-17 17:03:44,307 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 17:03:44,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c [2022-03-17 17:03:44,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b2251/4a9d7f759d7046ddbdc54a5f05badcde/FLAGf6fd6df31 [2022-03-17 17:03:44,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da80b2251/4a9d7f759d7046ddbdc54a5f05badcde [2022-03-17 17:03:44,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 17:03:44,329 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 17:03:44,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 17:03:44,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 17:03:44,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 17:03:44,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6daeb918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44, skipping insertion in model container [2022-03-17 17:03:44,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 17:03:44,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 17:03:44,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-03-17 17:03:44,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:03:44,527 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 17:03:44,534 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2022-03-17 17:03:44,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 17:03:44,548 INFO L208 MainTranslator]: Completed translation [2022-03-17 17:03:44,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44 WrapperNode [2022-03-17 17:03:44,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 17:03:44,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 17:03:44,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 17:03:44,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 17:03:44,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 17:03:44,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 17:03:44,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 17:03:44,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 17:03:44,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 17:03:44,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:44,593 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) [2022-03-17 17:03:44,597 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 [2022-03-17 17:03:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 17:03:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 17:03:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 17:03:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 17:03:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 17:03:44,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 17:03:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 17:03:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 17:03:44,662 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 17:03:44,663 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 17:03:44,758 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 17:03:44,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 17:03:44,762 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-17 17:03:44,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:03:44 BoogieIcfgContainer [2022-03-17 17:03:44,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 17:03:44,764 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 17:03:44,764 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 17:03:44,765 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 17:03:44,767 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:03:44" (1/1) ... [2022-03-17 17:03:44,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:03:44 BasicIcfg [2022-03-17 17:03:44,778 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 17:03:44,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 17:03:44,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 17:03:44,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 17:03:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 05:03:44" (1/4) ... [2022-03-17 17:03:44,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e04128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:03:44, skipping insertion in model container [2022-03-17 17:03:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 05:03:44" (2/4) ... [2022-03-17 17:03:44,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e04128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 05:03:44, skipping insertion in model container [2022-03-17 17:03:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 05:03:44" (3/4) ... [2022-03-17 17:03:44,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71e04128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:03:44, skipping insertion in model container [2022-03-17 17:03:44,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 05:03:44" (4/4) ... [2022-03-17 17:03:44,782 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.cJordan [2022-03-17 17:03:44,785 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 17:03:44,785 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 17:03:44,826 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 17:03:44,847 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 [2022-03-17 17:03:44,847 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 17:03:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 17:03:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 17:03:44,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:44,875 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:44,875 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:44,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-03-17 17:03:44,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:44,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570248454] [2022-03-17 17:03:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 17:03:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 17:03:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 17:03:45,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 17:03:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 17:03:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:45,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:45,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570248454] [2022-03-17 17:03:45,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570248454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:45,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:45,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 17:03:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751648505] [2022-03-17 17:03:45,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:45,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 17:03:45,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 17:03:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:03:45,119 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:03:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:45,165 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-03-17 17:03:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 17:03:45,167 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-17 17:03:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:45,171 INFO L225 Difference]: With dead ends: 40 [2022-03-17 17:03:45,171 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 17:03:45,172 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 17:03:45,177 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:45,177 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:45,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 17:03:45,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 17:03:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 17:03:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-17 17:03:45,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-17 17:03:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:45,200 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-17 17:03:45,200 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:03:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-17 17:03:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 17:03:45,202 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:45,202 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:45,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 17:03:45,202 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-03-17 17:03:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893725708] [2022-03-17 17:03:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:45,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:45,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:45,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227130826] [2022-03-17 17:03:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:45,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:45,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:45,220 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) [2022-03-17 17:03:45,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 17:03:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:03:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 17:03:45,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:03:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893725708] [2022-03-17 17:03:45,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227130826] [2022-03-17 17:03:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227130826] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:45,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:45,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 17:03:45,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216584896] [2022-03-17 17:03:45,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:45,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 17:03:45,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:45,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 17:03:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:03:45,357 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:45,411 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-03-17 17:03:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:03:45,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-17 17:03:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:45,413 INFO L225 Difference]: With dead ends: 47 [2022-03-17 17:03:45,413 INFO L226 Difference]: Without dead ends: 47 [2022-03-17 17:03:45,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:03:45,414 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:45,414 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-17 17:03:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-17 17:03:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 17:03:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-17 17:03:45,421 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-17 17:03:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:45,421 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-17 17:03:45,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-17 17:03:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 17:03:45,422 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:45,423 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 17:03:45,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 17:03:45,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:45,639 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-03-17 17:03:45,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:45,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715524438] [2022-03-17 17:03:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:45,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:45,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353937939] [2022-03-17 17:03:45,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:45,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:45,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:45,656 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) [2022-03-17 17:03:45,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 17:03:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-17 17:03:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:03:45,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:46,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715524438] [2022-03-17 17:03:46,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:46,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353937939] [2022-03-17 17:03:46,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353937939] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:03:46,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:03:46,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-17 17:03:46,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743220864] [2022-03-17 17:03:46,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:46,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:46,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:46,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:46,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-17 17:03:46,023 INFO L87 Difference]: Start difference. First operand 37 states and 46 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), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:46,067 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-03-17 17:03:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:03:46,067 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), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-17 17:03:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:46,068 INFO L225 Difference]: With dead ends: 51 [2022-03-17 17:03:46,068 INFO L226 Difference]: Without dead ends: 51 [2022-03-17 17:03:46,069 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-17 17:03:46,069 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:46,070 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-17 17:03:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-17 17:03:46,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-17 17:03:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-17 17:03:46,075 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-17 17:03:46,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:46,075 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-17 17:03:46,075 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), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:46,075 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-17 17:03:46,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 17:03:46,076 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:46,076 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-03-17 17:03:46,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:46,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 17:03:46,277 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:46,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-03-17 17:03:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:46,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336212717] [2022-03-17 17:03:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:46,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329661236] [2022-03-17 17:03:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:46,292 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) [2022-03-17 17:03:46,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 17:03:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-17 17:03:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 17:03:46,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 17:03:46,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:46,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336212717] [2022-03-17 17:03:46,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:46,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329661236] [2022-03-17 17:03:46,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329661236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:46,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:46,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-17 17:03:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117298825] [2022-03-17 17:03:46,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:46,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 17:03:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:46,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 17:03:46,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-17 17:03:46,530 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:03:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:46,653 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-03-17 17:03:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 17:03:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-17 17:03:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:46,655 INFO L225 Difference]: With dead ends: 96 [2022-03-17 17:03:46,655 INFO L226 Difference]: Without dead ends: 96 [2022-03-17 17:03:46,655 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:03:46,656 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:46,656 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:03:46,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-17 17:03:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-17 17:03:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:03:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-17 17:03:46,663 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-17 17:03:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:46,664 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-17 17:03:46,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-17 17:03:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-17 17:03:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 17:03:46,664 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:46,664 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:46,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:46,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:46,883 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:46,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:46,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-03-17 17:03:46,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:46,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720336595] [2022-03-17 17:03:46,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:46,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:46,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:46,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835909902] [2022-03-17 17:03:46,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:46,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:46,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:46,903 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) [2022-03-17 17:03:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 17:03:46,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:46,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-17 17:03:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:03:47,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:47,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720336595] [2022-03-17 17:03:47,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:47,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835909902] [2022-03-17 17:03:47,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835909902] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:03:47,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:03:47,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-17 17:03:47,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462767195] [2022-03-17 17:03:47,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:47,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-17 17:03:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-17 17:03:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 17:03:47,476 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:03:47,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:47,524 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-03-17 17:03:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 17:03:47,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-17 17:03:47,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:47,526 INFO L225 Difference]: With dead ends: 77 [2022-03-17 17:03:47,526 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 17:03:47,526 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-17 17:03:47,526 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:47,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 17:03:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-17 17:03:47,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 17:03:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-17 17:03:47,533 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-17 17:03:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:47,533 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-17 17:03:47,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-17 17:03:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-17 17:03:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-17 17:03:47,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:47,534 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:47,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:47,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:47,735 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:47,735 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-03-17 17:03:47,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249024433] [2022-03-17 17:03:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:47,745 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:47,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625792652] [2022-03-17 17:03:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:47,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:47,746 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) [2022-03-17 17:03:47,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 17:03:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-17 17:03:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 17:03:48,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249024433] [2022-03-17 17:03:48,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625792652] [2022-03-17 17:03:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625792652] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:48,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:48,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-17 17:03:48,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354518870] [2022-03-17 17:03:48,201 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:48,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 17:03:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 17:03:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-17 17:03:48,202 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:03:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:48,530 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-03-17 17:03:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-17 17:03:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-17 17:03:48,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:48,531 INFO L225 Difference]: With dead ends: 116 [2022-03-17 17:03:48,531 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 17:03:48,532 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-17 17:03:48,532 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:48,532 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 370 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:03:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 17:03:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-17 17:03:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 17:03:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-17 17:03:48,540 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-17 17:03:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:48,540 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-17 17:03:48,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-17 17:03:48,540 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-17 17:03:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 17:03:48,541 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:48,541 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:48,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 17:03:48,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:48,748 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-03-17 17:03:48,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:48,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855669264] [2022-03-17 17:03:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:48,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:48,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646218254] [2022-03-17 17:03:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:48,774 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) [2022-03-17 17:03:48,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 17:03:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:03:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-17 17:03:48,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:03:48,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:48,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855669264] [2022-03-17 17:03:48,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:48,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646218254] [2022-03-17 17:03:48,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646218254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:48,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:48,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:03:48,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751225377] [2022-03-17 17:03:48,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:48,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:03:48,924 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:03:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:48,954 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-03-17 17:03:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:03:48,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-17 17:03:48,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:48,955 INFO L225 Difference]: With dead ends: 149 [2022-03-17 17:03:48,955 INFO L226 Difference]: Without dead ends: 149 [2022-03-17 17:03:48,955 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:03:48,958 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:48,960 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-17 17:03:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-17 17:03:48,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-17 17:03:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-17 17:03:48,979 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-17 17:03:48,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:48,980 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-17 17:03:48,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-17 17:03:48,980 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-17 17:03:48,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 17:03:48,980 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:48,980 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:49,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:49,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:49,202 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:49,203 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-03-17 17:03:49,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:49,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740484282] [2022-03-17 17:03:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:49,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:49,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:49,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995984958] [2022-03-17 17:03:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:49,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:49,213 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) [2022-03-17 17:03:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 17:03:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-17 17:03:49,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 17:03:49,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740484282] [2022-03-17 17:03:49,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995984958] [2022-03-17 17:03:49,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995984958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:49,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:49,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-17 17:03:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42603797] [2022-03-17 17:03:49,801 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:49,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 17:03:49,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:49,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 17:03:49,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-17 17:03:49,802 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 17:03:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:50,941 INFO L93 Difference]: Finished difference Result 217 states and 308 transitions. [2022-03-17 17:03:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 17:03:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-17 17:03:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:50,944 INFO L225 Difference]: With dead ends: 217 [2022-03-17 17:03:50,944 INFO L226 Difference]: Without dead ends: 217 [2022-03-17 17:03:50,945 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-17 17:03:50,945 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 89 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:50,945 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 411 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 516 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-03-17 17:03:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-17 17:03:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 170. [2022-03-17 17:03:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 111 states have internal predecessors, (135), 53 states have call successors, (53), 10 states have call predecessors, (53), 9 states have return successors, (51), 48 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-17 17:03:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 239 transitions. [2022-03-17 17:03:50,956 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 239 transitions. Word has length 47 [2022-03-17 17:03:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:50,956 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 239 transitions. [2022-03-17 17:03:50,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 17:03:50,956 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 239 transitions. [2022-03-17 17:03:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 17:03:50,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:50,957 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:50,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:51,173 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:51,174 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:51,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:51,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-03-17 17:03:51,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:51,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162306287] [2022-03-17 17:03:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:51,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:51,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:51,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356417167] [2022-03-17 17:03:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:03:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:51,199 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) [2022-03-17 17:03:51,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 17:03:51,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:03:51,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:03:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-17 17:03:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:51,305 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 17:03:51,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:03:51,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:51,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162306287] [2022-03-17 17:03:51,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:51,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356417167] [2022-03-17 17:03:51,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356417167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:51,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:51,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:03:51,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415510092] [2022-03-17 17:03:51,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:51,306 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:51,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:51,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:03:51,307 INFO L87 Difference]: Start difference. First operand 170 states and 239 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:51,381 INFO L93 Difference]: Finished difference Result 140 states and 188 transitions. [2022-03-17 17:03:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:03:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-17 17:03:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:51,383 INFO L225 Difference]: With dead ends: 140 [2022-03-17 17:03:51,383 INFO L226 Difference]: Without dead ends: 140 [2022-03-17 17:03:51,383 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:03:51,383 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:51,383 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 17:03:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-17 17:03:51,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2022-03-17 17:03:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 75 states have internal predecessors, (85), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 17:03:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 153 transitions. [2022-03-17 17:03:51,388 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 153 transitions. Word has length 47 [2022-03-17 17:03:51,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:51,388 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 153 transitions. [2022-03-17 17:03:51,389 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 17:03:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 153 transitions. [2022-03-17 17:03:51,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 17:03:51,389 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:51,389 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2022-03-17 17:03:51,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:51,606 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,SelfDestructingSolverStorable8 [2022-03-17 17:03:51,606 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:51,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-03-17 17:03:51,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:51,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374393142] [2022-03-17 17:03:51,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:51,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:51,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393954208] [2022-03-17 17:03:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:51,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:51,615 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) [2022-03-17 17:03:51,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 17:03:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:51,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 17:03:51,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-17 17:03:51,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:03:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374393142] [2022-03-17 17:03:51,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:51,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393954208] [2022-03-17 17:03:51,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393954208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:51,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:51,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:03:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135972085] [2022-03-17 17:03:51,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:51,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:03:51,733 INFO L87 Difference]: Start difference. First operand 117 states and 153 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 17:03:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:51,765 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-03-17 17:03:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:03:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-17 17:03:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:51,767 INFO L225 Difference]: With dead ends: 165 [2022-03-17 17:03:51,767 INFO L226 Difference]: Without dead ends: 165 [2022-03-17 17:03:51,767 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:03:51,767 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:51,767 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-17 17:03:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-17 17:03:51,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-17 17:03:51,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-17 17:03:51,773 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-17 17:03:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:51,773 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-17 17:03:51,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-17 17:03:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-17 17:03:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-17 17:03:51,774 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:51,774 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:51,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:51,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 17:03:51,990 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-03-17 17:03:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:51,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293960367] [2022-03-17 17:03:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:51,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:51,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354430074] [2022-03-17 17:03:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:51,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:51,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:52,000 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) [2022-03-17 17:03:52,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 17:03:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 17:03:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 17:03:52,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-17 17:03:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293960367] [2022-03-17 17:03:52,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:52,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354430074] [2022-03-17 17:03:52,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354430074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:52,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:52,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 17:03:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884239306] [2022-03-17 17:03:52,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:52,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 17:03:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 17:03:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-17 17:03:52,821 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 17:03:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:56,503 INFO L93 Difference]: Finished difference Result 329 states and 485 transitions. [2022-03-17 17:03:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-17 17:03:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 64 [2022-03-17 17:03:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:56,506 INFO L225 Difference]: With dead ends: 329 [2022-03-17 17:03:56,506 INFO L226 Difference]: Without dead ends: 326 [2022-03-17 17:03:56,507 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 17:03:56,507 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 144 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:56,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 597 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-17 17:03:56,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-17 17:03:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-03-17 17:03:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 153 states have internal predecessors, (175), 89 states have call successors, (89), 15 states have call predecessors, (89), 14 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 17:03:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 351 transitions. [2022-03-17 17:03:56,517 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 351 transitions. Word has length 64 [2022-03-17 17:03:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:56,517 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 351 transitions. [2022-03-17 17:03:56,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 17:03:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 351 transitions. [2022-03-17 17:03:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 17:03:56,518 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:56,518 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:56,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:56,732 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,SelfDestructingSolverStorable10 [2022-03-17 17:03:56,733 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-03-17 17:03:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:56,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169941066] [2022-03-17 17:03:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:56,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626640704] [2022-03-17 17:03:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:56,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:56,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:56,745 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) [2022-03-17 17:03:56,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 17:03:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:56,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 17:03:56,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-03-17 17:03:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-03-17 17:03:57,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:57,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169941066] [2022-03-17 17:03:57,067 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:57,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626640704] [2022-03-17 17:03:57,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626640704] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 17:03:57,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 17:03:57,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-17 17:03:57,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723422736] [2022-03-17 17:03:57,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:57,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:57,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:57,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-17 17:03:57,068 INFO L87 Difference]: Start difference. First operand 250 states and 351 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 17:03:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:57,101 INFO L93 Difference]: Finished difference Result 254 states and 354 transitions. [2022-03-17 17:03:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-17 17:03:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 74 [2022-03-17 17:03:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:57,103 INFO L225 Difference]: With dead ends: 254 [2022-03-17 17:03:57,103 INFO L226 Difference]: Without dead ends: 254 [2022-03-17 17:03:57,103 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-17 17:03:57,103 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:57,103 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-17 17:03:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-17 17:03:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 149 states have (on average 1.1946308724832215) internal successors, (178), 156 states have internal predecessors, (178), 89 states have call successors, (89), 16 states have call predecessors, (89), 15 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 17:03:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 354 transitions. [2022-03-17 17:03:57,111 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 354 transitions. Word has length 74 [2022-03-17 17:03:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:57,111 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 354 transitions. [2022-03-17 17:03:57,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-17 17:03:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 354 transitions. [2022-03-17 17:03:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-17 17:03:57,111 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:57,111 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:57,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:57,317 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,SelfDestructingSolverStorable11 [2022-03-17 17:03:57,317 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:57,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-03-17 17:03:57,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:57,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937712787] [2022-03-17 17:03:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:57,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:57,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:57,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399367539] [2022-03-17 17:03:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:57,326 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) [2022-03-17 17:03:57,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 17:03:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:03:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-17 17:03:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 17:03:57,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:03:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 17:03:57,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937712787] [2022-03-17 17:03:57,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399367539] [2022-03-17 17:03:57,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399367539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:03:57,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:03:57,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-17 17:03:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497277120] [2022-03-17 17:03:57,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:03:57,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-17 17:03:57,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:57,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-17 17:03:57,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-17 17:03:57,797 INFO L87 Difference]: Start difference. First operand 254 states and 354 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 17:03:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:58,079 INFO L93 Difference]: Finished difference Result 321 states and 459 transitions. [2022-03-17 17:03:58,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 17:03:58,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-17 17:03:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:58,080 INFO L225 Difference]: With dead ends: 321 [2022-03-17 17:03:58,080 INFO L226 Difference]: Without dead ends: 321 [2022-03-17 17:03:58,081 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-17 17:03:58,081 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:58,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 302 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 17:03:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-17 17:03:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 258. [2022-03-17 17:03:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 152 states have (on average 1.1907894736842106) internal successors, (181), 159 states have internal predecessors, (181), 89 states have call successors, (89), 17 states have call predecessors, (89), 16 states have return successors, (87), 81 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-17 17:03:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 357 transitions. [2022-03-17 17:03:58,088 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 357 transitions. Word has length 72 [2022-03-17 17:03:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:58,088 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 357 transitions. [2022-03-17 17:03:58,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-17 17:03:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 357 transitions. [2022-03-17 17:03:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 17:03:58,089 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:58,089 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:58,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:58,289 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,SelfDestructingSolverStorable12 [2022-03-17 17:03:58,290 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:58,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-03-17 17:03:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:58,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165899796] [2022-03-17 17:03:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:58,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:58,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523641865] [2022-03-17 17:03:58,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 17:03:58,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:58,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:58,307 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) [2022-03-17 17:03:58,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 17:03:58,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 17:03:58,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:03:58,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-17 17:03:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-17 17:03:58,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 17:03:58,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:03:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165899796] [2022-03-17 17:03:58,450 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:03:58,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523641865] [2022-03-17 17:03:58,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523641865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 17:03:58,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 17:03:58,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-17 17:03:58,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933550754] [2022-03-17 17:03:58,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 17:03:58,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 17:03:58,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:03:58,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 17:03:58,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-17 17:03:58,451 INFO L87 Difference]: Start difference. First operand 258 states and 357 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 17:03:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:03:58,479 INFO L93 Difference]: Finished difference Result 266 states and 356 transitions. [2022-03-17 17:03:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 17:03:58,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-17 17:03:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:03:58,481 INFO L225 Difference]: With dead ends: 266 [2022-03-17 17:03:58,481 INFO L226 Difference]: Without dead ends: 266 [2022-03-17 17:03:58,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-17 17:03:58,481 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:03:58,481 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 17:03:58,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-17 17:03:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 257. [2022-03-17 17:03:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 159 states have (on average 1.1761006289308176) internal successors, (187), 161 states have internal predecessors, (187), 81 states have call successors, (81), 17 states have call predecessors, (81), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-17 17:03:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 347 transitions. [2022-03-17 17:03:58,503 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 347 transitions. Word has length 77 [2022-03-17 17:03:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:03:58,503 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 347 transitions. [2022-03-17 17:03:58,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-17 17:03:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 347 transitions. [2022-03-17 17:03:58,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-17 17:03:58,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:03:58,504 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:03:58,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 17:03:58,705 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,SelfDestructingSolverStorable13 [2022-03-17 17:03:58,705 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:03:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:03:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-03-17 17:03:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:03:58,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59798395] [2022-03-17 17:03:58,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:03:58,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:03:58,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:03:58,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551769203] [2022-03-17 17:03:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 17:03:58,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:03:58,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:03:58,712 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) [2022-03-17 17:03:58,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 17:03:58,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-17 17:03:58,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 17:03:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-17 17:03:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:03:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 17:03:59,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:04:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-17 17:04:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:04:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59798395] [2022-03-17 17:04:00,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:04:00,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551769203] [2022-03-17 17:04:00,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551769203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:04:00,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:04:00,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-03-17 17:04:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420850023] [2022-03-17 17:04:00,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:04:00,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 17:04:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:04:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 17:04:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2022-03-17 17:04:00,651 INFO L87 Difference]: Start difference. First operand 257 states and 347 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 17:04:12,395 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 [] [2022-03-17 17:04:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:04:23,509 INFO L93 Difference]: Finished difference Result 422 states and 581 transitions. [2022-03-17 17:04:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 17:04:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 77 [2022-03-17 17:04:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:04:23,511 INFO L225 Difference]: With dead ends: 422 [2022-03-17 17:04:23,511 INFO L226 Difference]: Without dead ends: 422 [2022-03-17 17:04:23,512 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=692, Invalid=2388, Unknown=0, NotChecked=0, Total=3080 [2022-03-17 17:04:23,513 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 251 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 405 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-03-17 17:04:23,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 692 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 974 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2022-03-17 17:04:23,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-03-17 17:04:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 359. [2022-03-17 17:04:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 219 states have internal predecessors, (260), 119 states have call successors, (119), 22 states have call predecessors, (119), 21 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-03-17 17:04:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 496 transitions. [2022-03-17 17:04:23,524 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 496 transitions. Word has length 77 [2022-03-17 17:04:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:04:23,524 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 496 transitions. [2022-03-17 17:04:23,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-17 17:04:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 496 transitions. [2022-03-17 17:04:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-17 17:04:23,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:04:23,527 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1, 1] [2022-03-17 17:04:23,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-17 17:04:23,746 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:04:23,746 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:04:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:04:23,747 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-03-17 17:04:23,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:04:23,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757159199] [2022-03-17 17:04:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:23,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:04:23,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:04:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833553900] [2022-03-17 17:04:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:04:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:04:23,758 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:04:23,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 17:04:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:04:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-17 17:04:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:04:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 56 proven. 24 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-03-17 17:04:24,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:04:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 73 proven. 4 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-17 17:04:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:04:36,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757159199] [2022-03-17 17:04:36,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:04:36,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833553900] [2022-03-17 17:04:36,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833553900] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:04:36,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:04:36,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-17 17:04:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149705026] [2022-03-17 17:04:36,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:04:36,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-17 17:04:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:04:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-17 17:04:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-03-17 17:04:36,025 INFO L87 Difference]: Start difference. First operand 359 states and 496 transitions. Second operand has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-17 17:04:43,251 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 [] [2022-03-17 17:04:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:04:44,572 INFO L93 Difference]: Finished difference Result 466 states and 637 transitions. [2022-03-17 17:04:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-17 17:04:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 91 [2022-03-17 17:04:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:04:44,574 INFO L225 Difference]: With dead ends: 466 [2022-03-17 17:04:44,574 INFO L226 Difference]: Without dead ends: 464 [2022-03-17 17:04:44,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=503, Invalid=2047, Unknown=0, NotChecked=0, Total=2550 [2022-03-17 17:04:44,575 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 142 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 297 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-17 17:04:44,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 565 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1187 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2022-03-17 17:04:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-17 17:04:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 370. [2022-03-17 17:04:44,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 213 states have (on average 1.192488262910798) internal successors, (254), 213 states have internal predecessors, (254), 130 states have call successors, (130), 27 states have call predecessors, (130), 26 states have return successors, (129), 129 states have call predecessors, (129), 129 states have call successors, (129) [2022-03-17 17:04:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 513 transitions. [2022-03-17 17:04:44,585 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 513 transitions. Word has length 91 [2022-03-17 17:04:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:04:44,585 INFO L478 AbstractCegarLoop]: Abstraction has 370 states and 513 transitions. [2022-03-17 17:04:44,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 20 states have internal predecessors, (54), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-17 17:04:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 513 transitions. [2022-03-17 17:04:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 17:04:44,586 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:04:44,586 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:04:44,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-17 17:04:44,802 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 17:04:44,802 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:04:44,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:04:44,802 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-03-17 17:04:44,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:04:44,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891568389] [2022-03-17 17:04:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:44,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:04:44,827 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:04:44,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32457928] [2022-03-17 17:04:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:04:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:04:44,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:04:44,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 17:04:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:04:44,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 17:04:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:04:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 17:04:45,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:04:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-17 17:04:45,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:04:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891568389] [2022-03-17 17:04:45,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:04:45,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32457928] [2022-03-17 17:04:45,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32457928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:04:45,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:04:45,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-17 17:04:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632789517] [2022-03-17 17:04:45,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:04:45,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-17 17:04:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:04:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-17 17:04:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-17 17:04:45,880 INFO L87 Difference]: Start difference. First operand 370 states and 513 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 17:04:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:04:47,409 INFO L93 Difference]: Finished difference Result 895 states and 1390 transitions. [2022-03-17 17:04:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-17 17:04:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-17 17:04:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:04:47,413 INFO L225 Difference]: With dead ends: 895 [2022-03-17 17:04:47,413 INFO L226 Difference]: Without dead ends: 895 [2022-03-17 17:04:47,413 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-17 17:04:47,413 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 85 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 17:04:47,413 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 465 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-17 17:04:47,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-03-17 17:04:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 823. [2022-03-17 17:04:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 395 states have (on average 1.3063291139240507) internal successors, (516), 395 states have internal predecessors, (516), 398 states have call successors, (398), 30 states have call predecessors, (398), 29 states have return successors, (397), 397 states have call predecessors, (397), 397 states have call successors, (397) [2022-03-17 17:04:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1311 transitions. [2022-03-17 17:04:47,435 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1311 transitions. Word has length 94 [2022-03-17 17:04:47,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:04:47,436 INFO L478 AbstractCegarLoop]: Abstraction has 823 states and 1311 transitions. [2022-03-17 17:04:47,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-17 17:04:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1311 transitions. [2022-03-17 17:04:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-17 17:04:47,439 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 17:04:47,439 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:04:47,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 17:04:47,656 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 17:04:47,656 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 17:04:47,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 17:04:47,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-03-17 17:04:47,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 17:04:47,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904921139] [2022-03-17 17:04:47,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 17:04:47,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 17:04:47,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570314547] [2022-03-17 17:04:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 17:04:47,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 17:04:47,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 17:04:47,668 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 17:04:47,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 17:04:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 17:04:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-17 17:04:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 17:04:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 17:04:48,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 17:04:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 24 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-17 17:04:48,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 17:04:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904921139] [2022-03-17 17:04:48,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 17:04:48,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570314547] [2022-03-17 17:04:48,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570314547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 17:04:48,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 17:04:48,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-17 17:04:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287766092] [2022-03-17 17:04:48,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 17:04:48,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-17 17:04:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 17:04:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-17 17:04:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-17 17:04:48,727 INFO L87 Difference]: Start difference. First operand 823 states and 1311 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 17:04:54,542 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 [] [2022-03-17 17:04:56,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:04:57,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-17 17:04:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 17:04:59,968 INFO L93 Difference]: Finished difference Result 927 states and 1488 transitions. [2022-03-17 17:04:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 17:04:59,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) Word has length 94 [2022-03-17 17:04:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 17:04:59,969 INFO L225 Difference]: With dead ends: 927 [2022-03-17 17:04:59,969 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 17:04:59,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 165 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2022-03-17 17:04:59,970 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 76 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 185 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-03-17 17:04:59,970 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 504 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 538 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-03-17 17:04:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 17:04:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 17:04:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 17:04:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 17:04:59,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 94 [2022-03-17 17:04:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 17:04:59,971 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 17:04:59,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 9 states have call predecessors, (23), 7 states have call successors, (23) [2022-03-17 17:04:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 17:04:59,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 17:04:59,974 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 17:04:59,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 17:05:00,174 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 17:05:00,177 INFO L718 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 17:05:00,178 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 17:05:00,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 05:05:00 BasicIcfg [2022-03-17 17:05:00,180 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 17:05:00,180 INFO L158 Benchmark]: Toolchain (without parser) took 75850.81ms. Allocated memory was 203.4MB in the beginning and 335.5MB in the end (delta: 132.1MB). Free memory was 149.9MB in the beginning and 297.6MB in the end (delta: -147.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:05:00,180 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 203.4MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:05:00,180 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.51ms. Allocated memory was 203.4MB in the beginning and 277.9MB in the end (delta: 74.4MB). Free memory was 149.6MB in the beginning and 248.7MB in the end (delta: -99.1MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. [2022-03-17 17:05:00,180 INFO L158 Benchmark]: Boogie Preprocessor took 22.08ms. Allocated memory is still 277.9MB. Free memory was 248.7MB in the beginning and 247.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 17:05:00,181 INFO L158 Benchmark]: RCFGBuilder took 192.29ms. Allocated memory is still 277.9MB. Free memory was 247.1MB in the beginning and 235.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-17 17:05:00,181 INFO L158 Benchmark]: IcfgTransformer took 13.80ms. Allocated memory is still 277.9MB. Free memory was 235.6MB in the beginning and 234.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 17:05:00,181 INFO L158 Benchmark]: TraceAbstraction took 75401.00ms. Allocated memory was 277.9MB in the beginning and 335.5MB in the end (delta: 57.7MB). Free memory was 233.8MB in the beginning and 297.6MB in the end (delta: -63.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 17:05:00,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 203.4MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.51ms. Allocated memory was 203.4MB in the beginning and 277.9MB in the end (delta: 74.4MB). Free memory was 149.6MB in the beginning and 248.7MB in the end (delta: -99.1MB). Peak memory consumption was 12.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.08ms. Allocated memory is still 277.9MB. Free memory was 248.7MB in the beginning and 247.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 192.29ms. Allocated memory is still 277.9MB. Free memory was 247.1MB in the beginning and 235.6MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.80ms. Allocated memory is still 277.9MB. Free memory was 235.6MB in the beginning and 234.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 75401.00ms. Allocated memory was 277.9MB in the beginning and 335.5MB in the end (delta: 57.7MB). Free memory was 233.8MB in the beginning and 297.6MB in the end (delta: -63.8MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 75.4s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 50.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 1203 SdHoareTripleChecker+Valid, 29.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1140 mSDsluCounter, 5496 SdHoareTripleChecker+Invalid, 28.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 94 IncrementalHoareTripleChecker+Unchecked, 4580 mSDsCounter, 1581 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5527 IncrementalHoareTripleChecker+Invalid, 7206 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1581 mSolverCounterUnsat, 916 mSDtfsCounter, 5527 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1974 GetRequests, 1626 SyntacticMatches, 18 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 24.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=823occurred in iteration=17, InterpolantAutomatonStates: 254, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 519 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 1063 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 1806 ConstructedInterpolants, 3 QuantifiedInterpolants, 9337 SizeOfPredicates, 100 NumberOfNonLiveVariables, 2865 ConjunctsInSsa, 472 ConjunctsInUnsatCore, 30 InterpolantComputations, 9 PerfectInterpolantSequences, 2231/2489 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 17:05:00,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...