/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 00:20:58,613 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 00:20:58,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 00:20:58,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 00:20:58,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 00:20:58,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 00:20:58,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 00:20:58,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 00:20:58,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 00:20:58,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 00:20:58,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 00:20:58,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 00:20:58,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 00:20:58,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 00:20:58,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 00:20:58,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 00:20:58,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 00:20:58,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 00:20:58,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 00:20:58,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 00:20:58,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-24 00:20:58,725 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 00:20:58,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 00:20:58,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-24 00:20:58,726 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-24 00:20:58,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-24 00:20:58,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-24 00:20:58,727 INFO L138 SettingsManager]: * Use SBE=true [2022-02-24 00:20:58,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 00:20:58,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 00:20:58,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 00:20:58,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 00:20:58,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:20:58,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 00:20:58,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-24 00:20:58,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-24 00:20:58,731 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-24 00:20:58,731 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 00:20:58,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 00:20:58,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 00:20:58,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 00:20:58,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 00:20:58,944 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 00:20:58,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-02-24 00:20:58,991 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e358f1485/227253aed9924077b9c13f11d690ea1c/FLAG0b4deaeda [2022-02-24 00:20:59,354 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 00:20:59,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-02-24 00:20:59,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e358f1485/227253aed9924077b9c13f11d690ea1c/FLAG0b4deaeda [2022-02-24 00:20:59,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e358f1485/227253aed9924077b9c13f11d690ea1c [2022-02-24 00:20:59,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 00:20:59,383 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-24 00:20:59,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 00:20:59,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 00:20:59,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 00:20:59,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47471e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59, skipping insertion in model container [2022-02-24 00:20:59,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 00:20:59,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 00:20:59,526 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/ps6-ll_unwindbound50.c[458,471] [2022-02-24 00:20:59,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:20:59,555 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 00:20:59,564 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2022-02-24 00:20:59,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 00:20:59,598 INFO L208 MainTranslator]: Completed translation [2022-02-24 00:20:59,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59 WrapperNode [2022-02-24 00:20:59,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 00:20:59,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 00:20:59,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 00:20:59,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 00:20:59,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 00:20:59,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 00:20:59,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 00:20:59,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 00:20:59,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 00:20:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:20:59,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 00:20:59,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 00:20:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 00:20:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 00:20:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 00:20:59,687 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 00:20:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 00:20:59,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 00:20:59,688 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 00:20:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 00:20:59,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 00:20:59,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 00:20:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 00:20:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 00:20:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 00:20:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 00:20:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 00:20:59,739 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 00:20:59,740 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 00:20:59,850 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 00:20:59,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 00:20:59,854 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 00:20:59,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:20:59 BoogieIcfgContainer [2022-02-24 00:20:59,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 00:20:59,856 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-24 00:20:59,856 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-24 00:20:59,857 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-24 00:20:59,859 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:20:59" (1/1) ... [2022-02-24 00:20:59,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:20:59 BasicIcfg [2022-02-24 00:20:59,871 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-24 00:20:59,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 00:20:59,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 00:20:59,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 00:20:59,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 12:20:59" (1/4) ... [2022-02-24 00:20:59,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73218d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:20:59, skipping insertion in model container [2022-02-24 00:20:59,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 12:20:59" (2/4) ... [2022-02-24 00:20:59,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73218d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 12:20:59, skipping insertion in model container [2022-02-24 00:20:59,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 12:20:59" (3/4) ... [2022-02-24 00:20:59,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73218d9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 12:20:59, skipping insertion in model container [2022-02-24 00:20:59,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 24.02 12:20:59" (4/4) ... [2022-02-24 00:20:59,876 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.cqvasr [2022-02-24 00:20:59,880 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-24 00:20:59,880 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 00:20:59,914 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 00:20:59,934 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-24 00:20:59,934 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 00:20:59,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-24 00:20:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 00:20:59,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:20:59,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:20:59,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:20:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:20:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2022-02-24 00:20:59,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:20:59,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848289631] [2022-02-24 00:20:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:20:59,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 00:21:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-24 00:21:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:00,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:00,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848289631] [2022-02-24 00:21:00,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848289631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:21:00,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:21:00,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 00:21:00,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623693416] [2022-02-24 00:21:00,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:21:00,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 00:21:00,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 00:21:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:21:00,124 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:21:00,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:00,185 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-02-24 00:21:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 00:21:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-02-24 00:21:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:00,192 INFO L225 Difference]: With dead ends: 50 [2022-02-24 00:21:00,192 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 00:21:00,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 00:21:00,196 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:00,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 00:21:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-02-24 00:21:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 00:21:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-02-24 00:21:00,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-02-24 00:21:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:00,224 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-02-24 00:21:00,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:21:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-02-24 00:21:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 00:21:00,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:00,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:00,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 00:21:00,226 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:00,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2022-02-24 00:21:00,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:00,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58481132] [2022-02-24 00:21:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:00,240 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:00,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442119081] [2022-02-24 00:21:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:00,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:00,243 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:00,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-24 00:21:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-24 00:21:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:00,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:21:00,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:00,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58481132] [2022-02-24 00:21:00,376 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:00,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442119081] [2022-02-24 00:21:00,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442119081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:21:00,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:21:00,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 00:21:00,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355814580] [2022-02-24 00:21:00,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:21:00,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 00:21:00,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:00,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 00:21:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:21:00,385 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:21:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:00,400 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-24 00:21:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 00:21:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-24 00:21:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:00,401 INFO L225 Difference]: With dead ends: 34 [2022-02-24 00:21:00,402 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 00:21:00,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 00:21:00,403 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:00,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 00:21:00,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-24 00:21:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-24 00:21:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-02-24 00:21:00,411 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-02-24 00:21:00,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:00,411 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-02-24 00:21:00,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 00:21:00,412 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-02-24 00:21:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 00:21:00,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:00,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:00,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-24 00:21:00,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:00,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:00,630 INFO L85 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2022-02-24 00:21:00,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:00,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056785225] [2022-02-24 00:21:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:00,639 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:00,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756413542] [2022-02-24 00:21:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:00,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:00,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:00,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:00,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-24 00:21:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:00,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:21:00,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:00,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-24 00:21:00,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:00,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056785225] [2022-02-24 00:21:00,726 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:00,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756413542] [2022-02-24 00:21:00,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756413542] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 00:21:00,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 00:21:00,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 00:21:00,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240934] [2022-02-24 00:21:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:21:00,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:21:00,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:21:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 00:21:00,728 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:21:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:00,924 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-02-24 00:21:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:21:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-24 00:21:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:00,926 INFO L225 Difference]: With dead ends: 36 [2022-02-24 00:21:00,926 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 00:21:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 00:21:00,927 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:00,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 94 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:21:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 00:21:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 00:21:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 00:21:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-24 00:21:00,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-02-24 00:21:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:00,933 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-24 00:21:00,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-24 00:21:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-24 00:21:00,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 00:21:00,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:00,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:01,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-24 00:21:01,152 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2022-02-24 00:21:01,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:01,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371876082] [2022-02-24 00:21:01,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:01,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:01,174 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:01,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273991073] [2022-02-24 00:21:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:01,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:01,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:01,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-24 00:21:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:01,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-24 00:21:01,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:01,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:01,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:01,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371876082] [2022-02-24 00:21:01,366 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:01,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273991073] [2022-02-24 00:21:01,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273991073] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:21:01,366 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:21:01,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-24 00:21:01,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029929456] [2022-02-24 00:21:01,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:01,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 00:21:01,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:01,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 00:21:01,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:21:01,368 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:21:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:01,556 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-02-24 00:21:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 00:21:01,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2022-02-24 00:21:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:01,557 INFO L225 Difference]: With dead ends: 66 [2022-02-24 00:21:01,557 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 00:21:01,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-24 00:21:01,558 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:01,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 106 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:21:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 00:21:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-02-24 00:21:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:21:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-02-24 00:21:01,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2022-02-24 00:21:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:01,565 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-02-24 00:21:01,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:21:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-02-24 00:21:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 00:21:01,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:01,566 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:01,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:01,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:01,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2022-02-24 00:21:01,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:01,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497549455] [2022-02-24 00:21:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:01,792 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:01,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711798353] [2022-02-24 00:21:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:01,794 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-24 00:21:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-24 00:21:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 00:21:01,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-24 00:21:02,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:02,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497549455] [2022-02-24 00:21:02,028 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:02,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711798353] [2022-02-24 00:21:02,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711798353] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:02,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:02,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-02-24 00:21:02,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896754894] [2022-02-24 00:21:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 00:21:02,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 00:21:02,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 00:21:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 00:21:02,030 INFO L87 Difference]: Start difference. First operand 54 states and 63 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:21:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:02,061 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-02-24 00:21:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 00:21:02,061 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-02-24 00:21:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:02,062 INFO L225 Difference]: With dead ends: 68 [2022-02-24 00:21:02,062 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 00:21:02,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 00:21:02,063 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:02,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 00:21:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-02-24 00:21:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-24 00:21:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-02-24 00:21:02,078 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2022-02-24 00:21:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:02,079 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-02-24 00:21:02,081 INFO L471 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-24 00:21:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-02-24 00:21:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 00:21:02,082 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:02,082 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:02,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-24 00:21:02,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:02,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:02,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2022-02-24 00:21:02,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:02,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691067178] [2022-02-24 00:21:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:02,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:02,294 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:02,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155002926] [2022-02-24 00:21:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:02,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:02,295 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:02,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-24 00:21:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-24 00:21:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-24 00:21:02,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:02,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:02,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691067178] [2022-02-24 00:21:02,649 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:02,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155002926] [2022-02-24 00:21:02,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155002926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:02,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:02,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-24 00:21:02,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960484423] [2022-02-24 00:21:02,650 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:02,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 00:21:02,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 00:21:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-24 00:21:02,651 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-24 00:21:02,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:02,699 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2022-02-24 00:21:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 00:21:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-02-24 00:21:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:02,702 INFO L225 Difference]: With dead ends: 59 [2022-02-24 00:21:02,702 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 00:21:02,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-24 00:21:02,704 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:02,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 159 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 00:21:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-24 00:21:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 00:21:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-02-24 00:21:02,722 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2022-02-24 00:21:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:02,723 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-02-24 00:21:02,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-24 00:21:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-02-24 00:21:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 00:21:02,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:02,725 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:02,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:02,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:02,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:02,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:02,943 INFO L85 PathProgramCache]: Analyzing trace with hash -678596118, now seen corresponding path program 2 times [2022-02-24 00:21:02,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:02,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953947535] [2022-02-24 00:21:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:02,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:02,958 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:02,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303413873] [2022-02-24 00:21:02,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:21:02,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:02,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:02,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-24 00:21:03,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:21:03,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:03,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-02-24 00:21:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:03,228 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-24 00:21:03,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:03,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:03,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953947535] [2022-02-24 00:21:03,348 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:03,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303413873] [2022-02-24 00:21:03,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303413873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:03,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:03,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-24 00:21:03,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808161400] [2022-02-24 00:21:03,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:03,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 00:21:03,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:03,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 00:21:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 00:21:03,349 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:21:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:03,424 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-02-24 00:21:03,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 00:21:03,424 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2022-02-24 00:21:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:03,425 INFO L225 Difference]: With dead ends: 58 [2022-02-24 00:21:03,425 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 00:21:03,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-02-24 00:21:03,426 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:03,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 206 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:03,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 00:21:03,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 00:21:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 00:21:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-02-24 00:21:03,431 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2022-02-24 00:21:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:03,431 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-02-24 00:21:03,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-24 00:21:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-02-24 00:21:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 00:21:03,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:03,432 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:03,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:03,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:03,636 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:03,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1280010632, now seen corresponding path program 3 times [2022-02-24 00:21:03,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:03,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090990405] [2022-02-24 00:21:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:03,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:03,645 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:03,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995646277] [2022-02-24 00:21:03,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-24 00:21:03,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:03,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:03,668 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:03,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-24 00:21:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-24 00:21:04,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-24 00:21:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-24 00:21:04,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:04,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:04,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090990405] [2022-02-24 00:21:04,468 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:04,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995646277] [2022-02-24 00:21:04,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995646277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:04,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:04,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-24 00:21:04,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115428314] [2022-02-24 00:21:04,468 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:04,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 00:21:04,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:04,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 00:21:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-24 00:21:04,469 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-24 00:21:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:04,539 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-02-24 00:21:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 00:21:04,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 53 [2022-02-24 00:21:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:04,540 INFO L225 Difference]: With dead ends: 60 [2022-02-24 00:21:04,540 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 00:21:04,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-24 00:21:04,541 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:04,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 259 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 00:21:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 00:21:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-24 00:21:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-24 00:21:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-02-24 00:21:04,546 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 53 [2022-02-24 00:21:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:04,546 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-02-24 00:21:04,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-02-24 00:21:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-02-24 00:21:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 00:21:04,547 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:04,547 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:04,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:04,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:04,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1735624483, now seen corresponding path program 1 times [2022-02-24 00:21:04,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:04,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416489903] [2022-02-24 00:21:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:04,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:04,765 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:04,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936398432] [2022-02-24 00:21:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:04,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:04,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:04,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:04,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-24 00:21:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:04,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-24 00:21:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-24 00:21:04,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-24 00:21:05,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:05,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416489903] [2022-02-24 00:21:05,018 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:05,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936398432] [2022-02-24 00:21:05,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936398432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:21:05,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:21:05,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-24 00:21:05,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277231585] [2022-02-24 00:21:05,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:05,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:21:05,019 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:05,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:21:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-24 00:21:05,020 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-24 00:21:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:05,180 INFO L93 Difference]: Finished difference Result 140 states and 152 transitions. [2022-02-24 00:21:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 00:21:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2022-02-24 00:21:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:05,184 INFO L225 Difference]: With dead ends: 140 [2022-02-24 00:21:05,184 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 00:21:05,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-24 00:21:05,186 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:05,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 157 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 00:21:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2022-02-24 00:21:05,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 72 states have (on average 1.0972222222222223) internal successors, (79), 77 states have internal predecessors, (79), 20 states have call successors, (20), 14 states have call predecessors, (20), 12 states have return successors, (18), 13 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-24 00:21:05,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2022-02-24 00:21:05,203 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 55 [2022-02-24 00:21:05,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:05,204 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2022-02-24 00:21:05,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2022-02-24 00:21:05,204 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2022-02-24 00:21:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 00:21:05,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:05,207 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:05,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:05,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-24 00:21:05,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:05,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:05,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1029628710, now seen corresponding path program 4 times [2022-02-24 00:21:05,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:05,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979648916] [2022-02-24 00:21:05,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:05,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:05,455 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:05,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591041568] [2022-02-24 00:21:05,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-24 00:21:05,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:05,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:05,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:05,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-24 00:21:05,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-24 00:21:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:05,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-24 00:21:05,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-24 00:21:05,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:05,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:05,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979648916] [2022-02-24 00:21:05,813 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:05,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591041568] [2022-02-24 00:21:05,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591041568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:05,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:05,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-24 00:21:05,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47664838] [2022-02-24 00:21:05,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:05,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 00:21:05,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 00:21:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-24 00:21:05,814 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-24 00:21:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:05,912 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-02-24 00:21:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 00:21:05,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 61 [2022-02-24 00:21:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:05,913 INFO L225 Difference]: With dead ends: 110 [2022-02-24 00:21:05,913 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 00:21:05,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-24 00:21:05,914 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:05,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 318 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 00:21:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-02-24 00:21:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-24 00:21:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2022-02-24 00:21:05,923 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 61 [2022-02-24 00:21:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:05,923 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2022-02-24 00:21:05,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-24 00:21:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2022-02-24 00:21:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 00:21:05,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:05,924 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:05,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:06,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-24 00:21:06,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886980, now seen corresponding path program 5 times [2022-02-24 00:21:06,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:06,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735997836] [2022-02-24 00:21:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:06,147 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:06,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937837829] [2022-02-24 00:21:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-24 00:21:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:06,148 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:06,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-24 00:21:06,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-02-24 00:21:06,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:06,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-24 00:21:06,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-24 00:21:06,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:06,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:06,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735997836] [2022-02-24 00:21:06,928 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:06,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937837829] [2022-02-24 00:21:06,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937837829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:06,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:06,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-24 00:21:06,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399816282] [2022-02-24 00:21:06,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:06,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 00:21:06,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:06,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 00:21:06,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-02-24 00:21:06,929 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-02-24 00:21:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:07,031 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-02-24 00:21:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 00:21:07,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2022-02-24 00:21:07,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:07,032 INFO L225 Difference]: With dead ends: 109 [2022-02-24 00:21:07,032 INFO L226 Difference]: Without dead ends: 103 [2022-02-24 00:21:07,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-24 00:21:07,033 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:07,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 383 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:07,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-24 00:21:07,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-02-24 00:21:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 18 states have call successors, (18), 14 states have call predecessors, (18), 12 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-24 00:21:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2022-02-24 00:21:07,040 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 69 [2022-02-24 00:21:07,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:07,040 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2022-02-24 00:21:07,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 8 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-02-24 00:21:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2022-02-24 00:21:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 00:21:07,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:07,041 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:07,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:07,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-24 00:21:07,246 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1006740382, now seen corresponding path program 6 times [2022-02-24 00:21:07,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:07,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118817555] [2022-02-24 00:21:07,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:07,253 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:07,253 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823023750] [2022-02-24 00:21:07,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-24 00:21:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:07,255 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:07,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-24 00:21:12,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-02-24 00:21:12,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-24 00:21:12,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-24 00:21:12,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:13,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:13,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118817555] [2022-02-24 00:21:13,284 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:13,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823023750] [2022-02-24 00:21:13,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823023750] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:13,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:13,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-02-24 00:21:13,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414028451] [2022-02-24 00:21:13,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:13,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 00:21:13,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 00:21:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 00:21:13,286 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-24 00:21:13,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:13,432 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2022-02-24 00:21:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 00:21:13,433 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 77 [2022-02-24 00:21:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:13,435 INFO L225 Difference]: With dead ends: 108 [2022-02-24 00:21:13,435 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 00:21:13,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-02-24 00:21:13,436 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:13,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 454 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 00:21:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-24 00:21:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-24 00:21:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-02-24 00:21:13,443 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 77 [2022-02-24 00:21:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:13,444 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-02-24 00:21:13,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 9 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-24 00:21:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-02-24 00:21:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 00:21:13,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:13,445 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:13,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-24 00:21:13,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -700032000, now seen corresponding path program 7 times [2022-02-24 00:21:13,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:13,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155644718] [2022-02-24 00:21:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:13,680 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:13,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320295800] [2022-02-24 00:21:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-24 00:21:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:13,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:13,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-24 00:21:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 00:21:14,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-24 00:21:14,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-02-24 00:21:14,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:14,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:14,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155644718] [2022-02-24 00:21:14,992 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:14,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320295800] [2022-02-24 00:21:14,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320295800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:14,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:14,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-24 00:21:14,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123238777] [2022-02-24 00:21:14,993 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:14,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 00:21:14,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 00:21:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-02-24 00:21:14,997 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-02-24 00:21:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:15,176 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2022-02-24 00:21:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 00:21:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 85 [2022-02-24 00:21:15,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:15,177 INFO L225 Difference]: With dead ends: 107 [2022-02-24 00:21:15,177 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 00:21:15,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-02-24 00:21:15,178 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:15,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 00:21:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-02-24 00:21:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 00:21:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-02-24 00:21:15,184 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 85 [2022-02-24 00:21:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:15,184 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-02-24 00:21:15,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-02-24 00:21:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-02-24 00:21:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 00:21:15,185 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:15,185 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:15,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-24 00:21:15,386 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1583078814, now seen corresponding path program 8 times [2022-02-24 00:21:15,386 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:15,386 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514073621] [2022-02-24 00:21:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:15,393 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:15,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701008814] [2022-02-24 00:21:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:21:15,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:15,399 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:15,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-24 00:21:16,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:21:16,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2022-02-24 00:21:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-24 00:21:16,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:16,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:16,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514073621] [2022-02-24 00:21:16,689 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:16,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701008814] [2022-02-24 00:21:16,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701008814] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:16,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:16,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-02-24 00:21:16,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237253101] [2022-02-24 00:21:16,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:16,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 00:21:16,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 00:21:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-02-24 00:21:16,690 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 00:21:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:16,849 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-02-24 00:21:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 00:21:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 93 [2022-02-24 00:21:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:16,850 INFO L225 Difference]: With dead ends: 106 [2022-02-24 00:21:16,851 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 00:21:16,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-02-24 00:21:16,851 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:16,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 614 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 00:21:16,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 00:21:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 00:21:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-24 00:21:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-02-24 00:21:16,857 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2022-02-24 00:21:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:16,857 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-02-24 00:21:16,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 11 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-24 00:21:16,857 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-02-24 00:21:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 00:21:16,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:16,858 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:16,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-24 00:21:17,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-24 00:21:17,064 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:17,064 INFO L85 PathProgramCache]: Analyzing trace with hash -6495940, now seen corresponding path program 9 times [2022-02-24 00:21:17,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:17,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106424318] [2022-02-24 00:21:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:17,078 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:17,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76735627] [2022-02-24 00:21:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-24 00:21:17,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:17,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:17,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-24 00:21:18,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-02-24 00:21:18,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:18,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-24 00:21:18,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-24 00:21:18,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:18,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:18,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106424318] [2022-02-24 00:21:18,577 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:18,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76735627] [2022-02-24 00:21:18,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76735627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:18,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:18,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-24 00:21:18,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952295746] [2022-02-24 00:21:18,577 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:18,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 00:21:18,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 00:21:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-24 00:21:18,578 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-02-24 00:21:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:18,789 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2022-02-24 00:21:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 00:21:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 101 [2022-02-24 00:21:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:18,790 INFO L225 Difference]: With dead ends: 108 [2022-02-24 00:21:18,790 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 00:21:18,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-24 00:21:18,791 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:18,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 703 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:21:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 00:21:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-24 00:21:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-24 00:21:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-02-24 00:21:18,799 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 101 [2022-02-24 00:21:18,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:18,800 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-02-24 00:21:18,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 12 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-02-24 00:21:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-02-24 00:21:18,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-24 00:21:18,801 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:18,801 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:18,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:19,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:19,002 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1941577257, now seen corresponding path program 2 times [2022-02-24 00:21:19,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:19,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536537384] [2022-02-24 00:21:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:19,008 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:19,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936462911] [2022-02-24 00:21:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-24 00:21:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:19,026 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:19,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-24 00:21:19,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-24 00:21:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-24 00:21:19,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-24 00:21:19,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-24 00:21:19,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:19,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536537384] [2022-02-24 00:21:19,602 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:19,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936462911] [2022-02-24 00:21:19,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936462911] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-24 00:21:19,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-24 00:21:19,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-24 00:21:19,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846068132] [2022-02-24 00:21:19,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:19,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 00:21:19,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 00:21:19,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-24 00:21:19,604 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2022-02-24 00:21:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:20,008 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2022-02-24 00:21:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 00:21:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) Word has length 103 [2022-02-24 00:21:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:20,010 INFO L225 Difference]: With dead ends: 272 [2022-02-24 00:21:20,010 INFO L226 Difference]: Without dead ends: 262 [2022-02-24 00:21:20,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 00:21:20,011 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 284 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:20,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 319 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:21:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-24 00:21:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 207. [2022-02-24 00:21:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 144 states have (on average 1.0902777777777777) internal successors, (157), 155 states have internal predecessors, (157), 38 states have call successors, (38), 26 states have call predecessors, (38), 24 states have return successors, (36), 25 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-24 00:21:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2022-02-24 00:21:20,025 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 103 [2022-02-24 00:21:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:20,025 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2022-02-24 00:21:20,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2022-02-24 00:21:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2022-02-24 00:21:20,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 00:21:20,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:20,026 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:20,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:20,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-24 00:21:20,242 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:20,242 INFO L85 PathProgramCache]: Analyzing trace with hash 526870234, now seen corresponding path program 10 times [2022-02-24 00:21:20,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:20,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352865496] [2022-02-24 00:21:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:20,248 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:20,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635662576] [2022-02-24 00:21:20,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-24 00:21:20,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:20,253 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:20,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-24 00:21:20,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-24 00:21:20,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:21:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-02-24 00:21:20,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:21:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-24 00:21:20,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:21:20,788 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:21:20,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352865496] [2022-02-24 00:21:20,789 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:21:20,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635662576] [2022-02-24 00:21:20,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635662576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:21:20,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:21:20,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-24 00:21:20,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83897344] [2022-02-24 00:21:20,789 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:21:20,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 00:21:20,789 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:21:20,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 00:21:20,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 00:21:20,790 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-24 00:21:20,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:21:20,999 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2022-02-24 00:21:21,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 00:21:21,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 109 [2022-02-24 00:21:21,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:21:21,001 INFO L225 Difference]: With dead ends: 212 [2022-02-24 00:21:21,001 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 00:21:21,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-24 00:21:21,002 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:21:21,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 798 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:21:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 00:21:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-02-24 00:21:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.0833333333333333) internal successors, (156), 154 states have internal predecessors, (156), 37 states have call successors, (37), 26 states have call predecessors, (37), 24 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-24 00:21:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2022-02-24 00:21:21,019 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 109 [2022-02-24 00:21:21,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:21:21,019 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2022-02-24 00:21:21,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 13 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-02-24 00:21:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2022-02-24 00:21:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 00:21:21,020 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:21:21,020 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:21:21,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-24 00:21:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-24 00:21:21,237 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:21:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:21:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -451318152, now seen corresponding path program 11 times [2022-02-24 00:21:21,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:21:21,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183079262] [2022-02-24 00:21:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:21:21,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:21:21,248 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:21:21,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640388360] [2022-02-24 00:21:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-24 00:21:21,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:21:21,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:21:21,250 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:21:21,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-24 00:23:50,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-02-24 00:23:50,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-24 00:23:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 52 conjunts are in the unsatisfiable core [2022-02-24 00:23:50,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-24 00:23:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-02-24 00:23:51,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-24 00:23:51,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-24 00:23:51,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183079262] [2022-02-24 00:23:51,402 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-24 00:23:51,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640388360] [2022-02-24 00:23:51,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640388360] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-24 00:23:51,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-24 00:23:51,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-02-24 00:23:51,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642132709] [2022-02-24 00:23:51,403 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-24 00:23:51,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 00:23:51,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-24 00:23:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 00:23:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-02-24 00:23:51,404 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-24 00:23:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 00:23:51,651 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2022-02-24 00:23:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 00:23:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2022-02-24 00:23:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 00:23:51,653 INFO L225 Difference]: With dead ends: 211 [2022-02-24 00:23:51,653 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 00:23:51,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-24 00:23:51,657 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 00:23:51,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 899 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 00:23:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 00:23:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-02-24 00:23:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 144 states have (on average 1.0763888888888888) internal successors, (155), 153 states have internal predecessors, (155), 36 states have call successors, (36), 26 states have call predecessors, (36), 24 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-24 00:23:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 225 transitions. [2022-02-24 00:23:51,684 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 225 transitions. Word has length 117 [2022-02-24 00:23:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 00:23:51,685 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 225 transitions. [2022-02-24 00:23:51,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-24 00:23:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 225 transitions. [2022-02-24 00:23:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-24 00:23:51,685 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 00:23:51,685 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 00:23:51,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-24 00:23:51,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-24 00:23:51,916 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 00:23:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 00:23:51,916 INFO L85 PathProgramCache]: Analyzing trace with hash 974190614, now seen corresponding path program 12 times [2022-02-24 00:23:51,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-24 00:23:51,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545039276] [2022-02-24 00:23:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 00:23:51,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 00:23:51,922 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-24 00:23:51,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351064454] [2022-02-24 00:23:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-24 00:23:51,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-24 00:23:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 00:23:51,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-24 00:23:51,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process