/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:45:07,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:45:07,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:45:07,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:45:07,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 00:45:07,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 00:45:07,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 00:45:07,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 00:45:07,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 00:45:07,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 00:45:07,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 00:45:07,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 00:45:07,547 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 00:45:07,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 00:45:07,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 00:45:07,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 00:45:07,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 00:45:07,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 00:45:07,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:45:07,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:45:07,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:45:07,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:45:07,596 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:45:07,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:45:07,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:45:07,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:45:07,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:45:07,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:45:07,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:45:07,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:45:07,598 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:45:07,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:45:07,599 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:45:07,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:45:07,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:45:07,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:45:07,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:45:07,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:45:07,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:45:07,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:45:07,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:45:07,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:45:07,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:45:07,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:45:07,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:45:07,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:45:07,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:45:07,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:45:07,836 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:45:07,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-03-20 00:45:07,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e875583/5a9fb510195d46ecb2150fdc13a9de09/FLAGc8b2a82ce [2022-03-20 00:45:08,229 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:45:08,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c [2022-03-20 00:45:08,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e875583/5a9fb510195d46ecb2150fdc13a9de09/FLAGc8b2a82ce [2022-03-20 00:45:08,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e875583/5a9fb510195d46ecb2150fdc13a9de09 [2022-03-20 00:45:08,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:45:08,660 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:45:08,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:45:08,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:45:08,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:45:08,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@205a45d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08, skipping insertion in model container [2022-03-20 00:45:08,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:45:08,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:45:08,842 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2022-03-20 00:45:08,858 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:45:08,865 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:45:08,872 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound20.c[490,503] [2022-03-20 00:45:08,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:45:08,890 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:45:08,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08 WrapperNode [2022-03-20 00:45:08,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:45:08,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:45:08,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:45:08,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:45:08,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:45:08,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:45:08,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:45:08,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:45:08,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (1/1) ... [2022-03-20 00:45:08,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:45:08,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:08,948 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:45:08,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:45:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:45:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:45:08,983 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:45:08,984 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:45:08,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:45:08,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:45:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:45:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:45:08,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:45:08,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:45:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:45:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:45:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:45:08,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:45:09,042 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:45:09,043 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:45:09,174 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:45:09,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:45:09,179 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-20 00:45:09,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:45:09 BoogieIcfgContainer [2022-03-20 00:45:09,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:45:09,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:45:09,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:45:09,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:45:09,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:45:08" (1/3) ... [2022-03-20 00:45:09,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a67ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:45:09, skipping insertion in model container [2022-03-20 00:45:09,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:45:08" (2/3) ... [2022-03-20 00:45:09,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a67ad2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:45:09, skipping insertion in model container [2022-03-20 00:45:09,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:45:09" (3/3) ... [2022-03-20 00:45:09,201 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound20.c [2022-03-20 00:45:09,205 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:45:09,205 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:45:09,268 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:45:09,274 INFO L340 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=PETRI_NET, 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 [2022-03-20 00:45:09,274 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:45:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 00:45:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:45:09,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:09,292 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:09,293 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2022-03-20 00:45:09,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:09,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760914800] [2022-03-20 00:45:09,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:09,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:45:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:45:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:45:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:45:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 00:45:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:09,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:09,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760914800] [2022-03-20 00:45:09,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760914800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:09,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:09,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:45:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880475114] [2022-03-20 00:45:09,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:09,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:45:09,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:45:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:45:09,537 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:45:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:09,612 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2022-03-20 00:45:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:45:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:45:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:09,622 INFO L225 Difference]: With dead ends: 73 [2022-03-20 00:45:09,622 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 00:45:09,626 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:45:09,629 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:09,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 00:45:09,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 00:45:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:45:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 00:45:09,680 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-03-20 00:45:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:09,681 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 00:45:09,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:45:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 00:45:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 00:45:09,684 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:09,684 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:09,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:45:09,685 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:09,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:09,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2022-03-20 00:45:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:09,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023756290] [2022-03-20 00:45:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:09,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:09,711 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890788012] [2022-03-20 00:45:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:09,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:09,716 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:09,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:45:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:09,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:45:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:45:09,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:45:09,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:09,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023756290] [2022-03-20 00:45:09,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:09,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890788012] [2022-03-20 00:45:09,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890788012] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:09,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:09,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:45:09,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106391750] [2022-03-20 00:45:09,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:09,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:45:09,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:45:09,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:45:09,904 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:10,010 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-03-20 00:45:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:45:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-03-20 00:45:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:10,015 INFO L225 Difference]: With dead ends: 54 [2022-03-20 00:45:10,015 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 00:45:10,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:45:10,017 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:10,018 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:45:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 00:45:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-03-20 00:45:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 00:45:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 00:45:10,050 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-03-20 00:45:10,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:10,050 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 00:45:10,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 00:45:10,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 00:45:10,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:10,051 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:10,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 00:45:10,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:10,256 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2022-03-20 00:45:10,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718996264] [2022-03-20 00:45:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:10,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:10,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:10,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978559371] [2022-03-20 00:45:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:10,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:10,289 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:10,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:45:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 00:45:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:45:10,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:10,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:10,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718996264] [2022-03-20 00:45:10,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978559371] [2022-03-20 00:45:10,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978559371] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:45:10,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:45:10,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:45:10,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102214467] [2022-03-20 00:45:10,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:10,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:45:10,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:10,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:45:10,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:45:10,769 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:10,811 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-20 00:45:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:45:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-03-20 00:45:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:10,813 INFO L225 Difference]: With dead ends: 53 [2022-03-20 00:45:10,813 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 00:45:10,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:45:10,814 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:10,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 00:45:10,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-03-20 00:45:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 00:45:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 00:45:10,823 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-03-20 00:45:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:10,824 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 00:45:10,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 00:45:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 00:45:10,825 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:10,825 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:10,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 00:45:11,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:45:11,052 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2022-03-20 00:45:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:11,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489285761] [2022-03-20 00:45:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:11,070 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:11,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706971173] [2022-03-20 00:45:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:11,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:11,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:11,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:11,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:45:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:45:11,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:45:11,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:45:11,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489285761] [2022-03-20 00:45:11,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:11,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706971173] [2022-03-20 00:45:11,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706971173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:11,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:11,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 00:45:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632057843] [2022-03-20 00:45:11,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:11,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:45:11,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:45:11,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:45:11,365 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:45:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:11,514 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2022-03-20 00:45:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:45:11,515 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-20 00:45:11,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:11,516 INFO L225 Difference]: With dead ends: 103 [2022-03-20 00:45:11,516 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 00:45:11,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:45:11,517 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:11,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 295 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:45:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 00:45:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-03-20 00:45:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:45:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-03-20 00:45:11,532 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-03-20 00:45:11,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:11,533 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-03-20 00:45:11,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:45:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-03-20 00:45:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 00:45:11,534 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:11,534 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:11,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 00:45:11,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:11,757 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2022-03-20 00:45:11,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:11,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539860009] [2022-03-20 00:45:11,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:11,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:11,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411402197] [2022-03-20 00:45:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:11,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:11,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:11,773 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:11,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:45:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:45:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:45:12,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:12,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539860009] [2022-03-20 00:45:12,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:12,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411402197] [2022-03-20 00:45:12,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411402197] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:45:12,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:45:12,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-03-20 00:45:12,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958395996] [2022-03-20 00:45:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:12,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 00:45:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 00:45:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:45:12,329 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:45:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:12,388 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-20 00:45:12,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:45:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-03-20 00:45:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:12,390 INFO L225 Difference]: With dead ends: 79 [2022-03-20 00:45:12,390 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 00:45:12,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:45:12,391 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 27 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:12,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 192 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:12,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 00:45:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-03-20 00:45:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:45:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-03-20 00:45:12,403 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-03-20 00:45:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:12,403 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-03-20 00:45:12,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:45:12,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-03-20 00:45:12,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 00:45:12,405 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:12,405 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:12,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:12,626 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:12,627 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2022-03-20 00:45:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:12,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476613647] [2022-03-20 00:45:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:12,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:12,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:12,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362328582] [2022-03-20 00:45:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:12,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:12,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:12,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:45:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:12,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 00:45:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:12,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:45:12,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476613647] [2022-03-20 00:45:13,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:13,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362328582] [2022-03-20 00:45:13,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362328582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:13,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:13,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-03-20 00:45:13,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332334186] [2022-03-20 00:45:13,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:13,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:45:13,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:45:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:45:13,173 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:45:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:13,671 INFO L93 Difference]: Finished difference Result 118 states and 159 transitions. [2022-03-20 00:45:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 00:45:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-03-20 00:45:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:13,673 INFO L225 Difference]: With dead ends: 118 [2022-03-20 00:45:13,673 INFO L226 Difference]: Without dead ends: 116 [2022-03-20 00:45:13,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-20 00:45:13,674 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:13,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 347 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 00:45:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-20 00:45:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-03-20 00:45:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 00:45:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-03-20 00:45:13,691 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-03-20 00:45:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:13,692 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-03-20 00:45:13,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:45:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-03-20 00:45:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:45:13,693 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:13,693 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:13,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:13,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:13,912 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2022-03-20 00:45:13,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:13,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985058129] [2022-03-20 00:45:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:13,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635404305] [2022-03-20 00:45:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:13,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:13,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:13,926 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:13,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:45:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:13,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:45:13,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 00:45:14,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:45:14,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985058129] [2022-03-20 00:45:14,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:14,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635404305] [2022-03-20 00:45:14,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635404305] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:14,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:14,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:45:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407946823] [2022-03-20 00:45:14,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:14,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:45:14,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:45:14,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:45:14,048 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:45:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:14,094 INFO L93 Difference]: Finished difference Result 151 states and 213 transitions. [2022-03-20 00:45:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:45:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-03-20 00:45:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:14,096 INFO L225 Difference]: With dead ends: 151 [2022-03-20 00:45:14,096 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 00:45:14,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:45:14,097 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:14,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:14,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 00:45:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-03-20 00:45:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 00:45:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-03-20 00:45:14,121 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-03-20 00:45:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:14,121 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-03-20 00:45:14,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:45:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-03-20 00:45:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:45:14,122 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:14,122 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:14,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:14,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:14,344 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2022-03-20 00:45:14,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665794482] [2022-03-20 00:45:14,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:14,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:14,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:14,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764092460] [2022-03-20 00:45:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:14,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:14,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:14,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:14,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:45:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 00:45:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 00:45:14,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:14,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665794482] [2022-03-20 00:45:14,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:14,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764092460] [2022-03-20 00:45:14,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764092460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:14,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:14,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-03-20 00:45:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544037573] [2022-03-20 00:45:14,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:14,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 00:45:14,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 00:45:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-20 00:45:14,963 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:45:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:17,730 INFO L93 Difference]: Finished difference Result 190 states and 265 transitions. [2022-03-20 00:45:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:45:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-03-20 00:45:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:17,735 INFO L225 Difference]: With dead ends: 190 [2022-03-20 00:45:17,735 INFO L226 Difference]: Without dead ends: 188 [2022-03-20 00:45:17,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 00:45:17,736 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:17,736 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 288 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 00:45:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-20 00:45:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-03-20 00:45:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 00:45:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-03-20 00:45:17,776 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-03-20 00:45:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:17,777 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-03-20 00:45:17,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-20 00:45:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-03-20 00:45:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 00:45:17,778 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:17,778 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:17,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:18,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:18,001 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2022-03-20 00:45:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:18,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983046214] [2022-03-20 00:45:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:18,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:18,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870094678] [2022-03-20 00:45:18,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:45:18,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:18,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:18,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:45:18,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:45:18,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:45:18,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:45:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:45:18,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:45:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:18,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983046214] [2022-03-20 00:45:18,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:18,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870094678] [2022-03-20 00:45:18,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870094678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:18,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:18,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:45:18,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321497308] [2022-03-20 00:45:18,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:18,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:45:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:18,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:45:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:45:18,142 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:18,236 INFO L93 Difference]: Finished difference Result 225 states and 312 transitions. [2022-03-20 00:45:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:45:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-03-20 00:45:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:18,238 INFO L225 Difference]: With dead ends: 225 [2022-03-20 00:45:18,238 INFO L226 Difference]: Without dead ends: 144 [2022-03-20 00:45:18,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:45:18,243 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:18,243 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-20 00:45:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-03-20 00:45:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 00:45:18,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-03-20 00:45:18,272 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-03-20 00:45:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:18,273 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-03-20 00:45:18,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 00:45:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-03-20 00:45:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 00:45:18,278 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:18,278 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:18,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:18,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 00:45:18,492 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:18,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2022-03-20 00:45:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:18,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487865780] [2022-03-20 00:45:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:18,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:18,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165121770] [2022-03-20 00:45:18,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:18,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:18,506 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:18,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 00:45:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:45:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-03-20 00:45:18,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:45:18,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487865780] [2022-03-20 00:45:18,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:18,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165121770] [2022-03-20 00:45:18,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165121770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:18,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:18,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:45:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656396156] [2022-03-20 00:45:18,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:18,652 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:45:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:45:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:45:18,653 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:45:18,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:18,715 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2022-03-20 00:45:18,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:45:18,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-03-20 00:45:18,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:18,717 INFO L225 Difference]: With dead ends: 167 [2022-03-20 00:45:18,717 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 00:45:18,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:45:18,718 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:18,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 00:45:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-03-20 00:45:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 00:45:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-03-20 00:45:18,744 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-03-20 00:45:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:18,744 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-03-20 00:45:18,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-20 00:45:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-03-20 00:45:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 00:45:18,745 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:18,745 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:18,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:18,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 00:45:18,958 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:18,959 INFO L85 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2022-03-20 00:45:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:18,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432507465] [2022-03-20 00:45:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:18,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:18,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:18,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188294846] [2022-03-20 00:45:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:18,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:18,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:18,970 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:18,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 00:45:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:19,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-20 00:45:19,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:45:19,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-20 00:45:20,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432507465] [2022-03-20 00:45:20,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188294846] [2022-03-20 00:45:20,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188294846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:20,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:20,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-03-20 00:45:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007430147] [2022-03-20 00:45:20,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:20,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 00:45:20,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 00:45:20,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-20 00:45:20,011 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:45:27,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:28,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:28,239 INFO L93 Difference]: Finished difference Result 294 states and 426 transitions. [2022-03-20 00:45:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 00:45:28,240 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-03-20 00:45:28,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:28,242 INFO L225 Difference]: With dead ends: 294 [2022-03-20 00:45:28,242 INFO L226 Difference]: Without dead ends: 290 [2022-03-20 00:45:28,243 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 00:45:28,244 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 134 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:28,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 462 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-03-20 00:45:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-20 00:45:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-03-20 00:45:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:45:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-03-20 00:45:28,321 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-03-20 00:45:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:28,321 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-03-20 00:45:28,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:45:28,321 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-03-20 00:45:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 00:45:28,322 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:28,322 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:28,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:28,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 00:45:28,542 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:28,542 INFO L85 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2022-03-20 00:45:28,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:28,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214555348] [2022-03-20 00:45:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:28,551 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:28,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009693007] [2022-03-20 00:45:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:28,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:28,553 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:28,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 00:45:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-20 00:45:28,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 00:45:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-20 00:45:28,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214555348] [2022-03-20 00:45:28,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:28,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009693007] [2022-03-20 00:45:28,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009693007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:28,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:28,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-03-20 00:45:28,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181964067] [2022-03-20 00:45:28,894 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:28,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:45:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:28,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:45:28,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:45:28,895 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:45:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:29,115 INFO L93 Difference]: Finished difference Result 347 states and 502 transitions. [2022-03-20 00:45:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:45:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-03-20 00:45:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:29,118 INFO L225 Difference]: With dead ends: 347 [2022-03-20 00:45:29,119 INFO L226 Difference]: Without dead ends: 345 [2022-03-20 00:45:29,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:45:29,120 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:29,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 275 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:45:29,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-20 00:45:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-03-20 00:45:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:45:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-03-20 00:45:29,192 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-03-20 00:45:29,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:29,193 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-03-20 00:45:29,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:45:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-03-20 00:45:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 00:45:29,194 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:29,194 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:29,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:29,410 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 00:45:29,411 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2022-03-20 00:45:29,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:29,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189166246] [2022-03-20 00:45:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:29,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:29,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680653226] [2022-03-20 00:45:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:29,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:29,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 00:45:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:45:29,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-20 00:45:29,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-20 00:45:29,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 00:45:29,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189166246] [2022-03-20 00:45:29,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680653226] [2022-03-20 00:45:29,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680653226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:29,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:29,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-20 00:45:29,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284900882] [2022-03-20 00:45:29,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:29,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 00:45:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 00:45:29,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-20 00:45:29,928 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:45:30,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:30,442 INFO L93 Difference]: Finished difference Result 323 states and 453 transitions. [2022-03-20 00:45:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 00:45:30,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-03-20 00:45:30,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:30,447 INFO L225 Difference]: With dead ends: 323 [2022-03-20 00:45:30,448 INFO L226 Difference]: Without dead ends: 321 [2022-03-20 00:45:30,448 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-20 00:45:30,449 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 80 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:30,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 294 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 00:45:30,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-20 00:45:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-03-20 00:45:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 00:45:30,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-03-20 00:45:30,514 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-03-20 00:45:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:30,515 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-03-20 00:45:30,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:45:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-03-20 00:45:30,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 00:45:30,516 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:30,516 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:30,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:30,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 00:45:30,740 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2022-03-20 00:45:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275512246] [2022-03-20 00:45:30,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:30,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:30,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721221780] [2022-03-20 00:45:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:45:30,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:30,753 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:30,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 00:45:30,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:45:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:45:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 00:45:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 00:45:30,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:45:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275512246] [2022-03-20 00:45:30,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:30,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721221780] [2022-03-20 00:45:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721221780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:45:30,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:45:30,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:45:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489533230] [2022-03-20 00:45:30,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:45:30,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:45:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:30,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:45:30,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:45:30,910 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 00:45:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:45:31,045 INFO L93 Difference]: Finished difference Result 449 states and 606 transitions. [2022-03-20 00:45:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:45:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-03-20 00:45:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:45:31,047 INFO L225 Difference]: With dead ends: 449 [2022-03-20 00:45:31,047 INFO L226 Difference]: Without dead ends: 264 [2022-03-20 00:45:31,048 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:45:31,048 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:45:31,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:45:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-20 00:45:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-03-20 00:45:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 00:45:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-03-20 00:45:31,134 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-03-20 00:45:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:45:31,134 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-03-20 00:45:31,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-20 00:45:31,135 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-03-20 00:45:31,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 00:45:31,136 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:45:31,137 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:45:31,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 00:45:31,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 00:45:31,355 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:45:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:45:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 3 times [2022-03-20 00:45:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:45:31,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217011109] [2022-03-20 00:45:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:45:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:45:31,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:45:31,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086403380] [2022-03-20 00:45:31,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:45:31,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:45:31,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:45:31,364 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:45:31,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 00:45:31,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:45:31,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:45:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 00:45:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:45:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-20 00:45:32,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:45:33,943 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:45:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:45:40,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:45:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217011109] [2022-03-20 00:45:40,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:45:40,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086403380] [2022-03-20 00:45:40,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086403380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:45:40,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:45:40,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-03-20 00:45:40,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553715398] [2022-03-20 00:45:40,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:45:40,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 00:45:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:45:40,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 00:45:40,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-03-20 00:45:40,261 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:46:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:46:00,519 INFO L93 Difference]: Finished difference Result 379 states and 508 transitions. [2022-03-20 00:46:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 00:46:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-03-20 00:46:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:46:00,523 INFO L225 Difference]: With dead ends: 379 [2022-03-20 00:46:00,523 INFO L226 Difference]: Without dead ends: 377 [2022-03-20 00:46:00,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=840, Invalid=3715, Unknown=1, NotChecked=0, Total=4556 [2022-03-20 00:46:00,525 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 271 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:46:00,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 634 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1219 Invalid, 0 Unknown, 157 Unchecked, 3.5s Time] [2022-03-20 00:46:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-20 00:46:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2022-03-20 00:46:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 226 states have internal predecessors, (260), 113 states have call successors, (113), 24 states have call predecessors, (113), 23 states have return successors, (111), 108 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 00:46:00,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 484 transitions. [2022-03-20 00:46:00,630 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 484 transitions. Word has length 77 [2022-03-20 00:46:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:46:00,630 INFO L478 AbstractCegarLoop]: Abstraction has 359 states and 484 transitions. [2022-03-20 00:46:00,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:46:00,630 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 484 transitions. [2022-03-20 00:46:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 00:46:00,631 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:46:00,631 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:46:00,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 00:46:00,854 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:46:00,854 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:46:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:46:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 1 times [2022-03-20 00:46:00,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:46:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289610223] [2022-03-20 00:46:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:00,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:46:00,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:46:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242972047] [2022-03-20 00:46:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:00,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:46:00,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:46:00,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:46:00,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 00:46:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:46:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 00:46:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:46:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 00:46:01,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:46:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-03-20 00:46:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:46:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289610223] [2022-03-20 00:46:02,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:46:02,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242972047] [2022-03-20 00:46:02,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242972047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:46:02,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:46:02,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-20 00:46:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792976206] [2022-03-20 00:46:02,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:46:02,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 00:46:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:46:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 00:46:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-20 00:46:02,684 INFO L87 Difference]: Start difference. First operand 359 states and 484 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:46:08,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:10,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:14,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:22,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:24,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:25,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:28,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:30,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:31,886 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:34,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:37,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:43,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:44,661 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:46:46,917 INFO L93 Difference]: Finished difference Result 601 states and 860 transitions. [2022-03-20 00:46:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 00:46:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-03-20 00:46:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:46:46,921 INFO L225 Difference]: With dead ends: 601 [2022-03-20 00:46:46,921 INFO L226 Difference]: Without dead ends: 597 [2022-03-20 00:46:46,922 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=880, Invalid=3950, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 00:46:46,923 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 161 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 415 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:46:46,923 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 790 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1552 Invalid, 7 Unknown, 0 Unchecked, 38.0s Time] [2022-03-20 00:46:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-20 00:46:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 553. [2022-03-20 00:46:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 318 states have (on average 1.2075471698113207) internal successors, (384), 322 states have internal predecessors, (384), 205 states have call successors, (205), 30 states have call predecessors, (205), 29 states have return successors, (203), 200 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-20 00:46:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 792 transitions. [2022-03-20 00:46:47,116 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 792 transitions. Word has length 91 [2022-03-20 00:46:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:46:47,116 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 792 transitions. [2022-03-20 00:46:47,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:46:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 792 transitions. [2022-03-20 00:46:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 00:46:47,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:46:47,118 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:46:47,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 00:46:47,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 00:46:47,341 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:46:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:46:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -801999833, now seen corresponding path program 1 times [2022-03-20 00:46:47,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:46:47,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443700066] [2022-03-20 00:46:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:47,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:46:47,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:46:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236931531] [2022-03-20 00:46:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:47,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:46:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:46:47,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:46:47,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 00:46:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:46:47,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 00:46:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:46:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 00:46:47,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:46:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-03-20 00:46:48,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:46:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443700066] [2022-03-20 00:46:48,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:46:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236931531] [2022-03-20 00:46:48,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236931531] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:46:48,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:46:48,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-20 00:46:48,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589779316] [2022-03-20 00:46:48,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:46:48,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:46:48,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:46:48,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:46:48,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-20 00:46:48,309 INFO L87 Difference]: Start difference. First operand 553 states and 792 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:46:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:46:50,108 INFO L93 Difference]: Finished difference Result 1264 states and 1957 transitions. [2022-03-20 00:46:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:46:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-03-20 00:46:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:46:50,115 INFO L225 Difference]: With dead ends: 1264 [2022-03-20 00:46:50,115 INFO L226 Difference]: Without dead ends: 1262 [2022-03-20 00:46:50,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:46:50,116 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 101 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 00:46:50,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 436 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 00:46:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-03-20 00:46:50,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1153. [2022-03-20 00:46:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 564 states have (on average 1.303191489361702) internal successors, (735), 568 states have internal predecessors, (735), 553 states have call successors, (553), 36 states have call predecessors, (553), 35 states have return successors, (551), 548 states have call predecessors, (551), 551 states have call successors, (551) [2022-03-20 00:46:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1839 transitions. [2022-03-20 00:46:50,729 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1839 transitions. Word has length 94 [2022-03-20 00:46:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:46:50,730 INFO L478 AbstractCegarLoop]: Abstraction has 1153 states and 1839 transitions. [2022-03-20 00:46:50,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:46:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1839 transitions. [2022-03-20 00:46:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 00:46:50,731 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:46:50,731 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:46:50,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 00:46:50,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 00:46:50,940 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:46:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:46:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash -568526404, now seen corresponding path program 2 times [2022-03-20 00:46:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:46:50,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800983449] [2022-03-20 00:46:50,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:50,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:46:50,948 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:46:50,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346517950] [2022-03-20 00:46:50,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:46:50,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:46:50,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:46:50,956 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:46:50,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 00:46:51,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:46:51,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:46:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 00:46:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:46:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 00:46:51,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:46:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-03-20 00:46:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:46:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800983449] [2022-03-20 00:46:51,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:46:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346517950] [2022-03-20 00:46:51,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346517950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:46:51,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:46:51,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-03-20 00:46:51,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214663349] [2022-03-20 00:46:51,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:46:51,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:46:51,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:46:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:46:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:46:51,325 INFO L87 Difference]: Start difference. First operand 1153 states and 1839 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:46:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:46:52,317 INFO L93 Difference]: Finished difference Result 1367 states and 2176 transitions. [2022-03-20 00:46:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:46:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-03-20 00:46:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:46:52,324 INFO L225 Difference]: With dead ends: 1367 [2022-03-20 00:46:52,324 INFO L226 Difference]: Without dead ends: 1360 [2022-03-20 00:46:52,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-03-20 00:46:52,326 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 61 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:46:52,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 500 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:46:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2022-03-20 00:46:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1125. [2022-03-20 00:46:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 542 states have (on average 1.311808118081181) internal successors, (711), 545 states have internal predecessors, (711), 547 states have call successors, (547), 36 states have call predecessors, (547), 35 states have return successors, (545), 543 states have call predecessors, (545), 545 states have call successors, (545) [2022-03-20 00:46:52,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1803 transitions. [2022-03-20 00:46:52,903 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1803 transitions. Word has length 99 [2022-03-20 00:46:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:46:52,903 INFO L478 AbstractCegarLoop]: Abstraction has 1125 states and 1803 transitions. [2022-03-20 00:46:52,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-03-20 00:46:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1803 transitions. [2022-03-20 00:46:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 00:46:52,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:46:52,907 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:46:52,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 00:46:53,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 00:46:53,124 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:46:53,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:46:53,124 INFO L85 PathProgramCache]: Analyzing trace with hash -851432394, now seen corresponding path program 1 times [2022-03-20 00:46:53,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:46:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969998940] [2022-03-20 00:46:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:53,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:46:53,133 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:46:53,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337125506] [2022-03-20 00:46:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:46:53,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:46:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:46:53,135 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) [2022-03-20 00:46:53,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 00:46:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:46:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 00:46:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:46:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 97 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-03-20 00:46:54,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:46:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 98 proven. 60 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-20 00:46:56,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:46:56,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969998940] [2022-03-20 00:46:56,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:46:56,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337125506] [2022-03-20 00:46:56,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337125506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:46:56,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:46:56,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-03-20 00:46:56,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920119579] [2022-03-20 00:46:56,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:46:56,342 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 00:46:56,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:46:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 00:46:56,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:46:56,343 INFO L87 Difference]: Start difference. First operand 1125 states and 1803 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 00:47:31,789 WARN L232 SmtUtils]: Spent 31.44s on a formula simplification. DAG size of input: 121 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:47:50,285 WARN L232 SmtUtils]: Spent 14.84s on a formula simplification. DAG size of input: 130 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:08,497 WARN L232 SmtUtils]: Spent 7.40s on a formula simplification. DAG size of input: 126 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:10,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:13,242 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:14,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:22,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:32,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:34,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:35,791 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:38,006 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:52,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:54,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:56,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:58,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:00,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:24,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:26,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:28,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:49:31,225 INFO L93 Difference]: Finished difference Result 1322 states and 2116 transitions. [2022-03-20 00:49:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:49:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 11 states have call successors, (31) Word has length 119 [2022-03-20 00:49:31,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:49:31,232 INFO L225 Difference]: With dead ends: 1322 [2022-03-20 00:49:31,233 INFO L226 Difference]: Without dead ends: 1320 [2022-03-20 00:49:31,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 208 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 119.5s TimeCoverageRelationStatistics Valid=389, Invalid=1329, Unknown=4, NotChecked=0, Total=1722 [2022-03-20 00:49:31,234 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 142 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 287 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.5s IncrementalHoareTripleChecker+Time [2022-03-20 00:49:31,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 726 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 809 Invalid, 13 Unknown, 0 Unchecked, 36.5s Time] [2022-03-20 00:49:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-20 00:49:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1145. [2022-03-20 00:49:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 557 states have (on average 1.303411131059246) internal successors, (726), 560 states have internal predecessors, (726), 547 states have call successors, (547), 41 states have call predecessors, (547), 40 states have return successors, (545), 543 states have call predecessors, (545), 545 states have call successors, (545) [2022-03-20 00:49:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1818 transitions. [2022-03-20 00:49:31,837 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1818 transitions. Word has length 119 [2022-03-20 00:49:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:49:31,837 INFO L478 AbstractCegarLoop]: Abstraction has 1145 states and 1818 transitions. [2022-03-20 00:49:31,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 11 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 11 states have call successors, (31) [2022-03-20 00:49:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1818 transitions. [2022-03-20 00:49:31,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 00:49:31,840 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:49:31,840 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:49:31,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 00:49:32,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:32,055 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:49:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:49:32,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1937049344, now seen corresponding path program 2 times [2022-03-20 00:49:32,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:49:32,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393106348] [2022-03-20 00:49:32,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:49:32,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:49:32,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:49:32,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555381493] [2022-03-20 00:49:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:49:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:49:32,064 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:49:32,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 00:49:32,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:49:32,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:49:32,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-20 00:49:32,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:49:33,427 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:33,431 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:33,434 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:33,437 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:50:06,057 WARN L232 SmtUtils]: Spent 22.03s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:50:44,235 WARN L232 SmtUtils]: Spent 15.61s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:50:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 128 proven. 77 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-20 00:50:46,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:50:55,484 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:50:55,486 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:50:59,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:50:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393106348] [2022-03-20 00:50:59,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:50:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555381493] [2022-03-20 00:50:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555381493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:50:59,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:50:59,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-20 00:50:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616467436] [2022-03-20 00:50:59,265 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:50:59,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 00:50:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:50:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 00:50:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=812, Unknown=1, NotChecked=0, Total=930 [2022-03-20 00:50:59,266 INFO L87 Difference]: Start difference. First operand 1145 states and 1818 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 00:51:45,365 WARN L232 SmtUtils]: Spent 37.42s on a formula simplification. DAG size of input: 127 DAG size of output: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:51:48,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:51:53,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:51:55,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:51:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:51:57,773 INFO L93 Difference]: Finished difference Result 1390 states and 2204 transitions. [2022-03-20 00:51:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 00:51:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) Word has length 138 [2022-03-20 00:51:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:51:57,779 INFO L225 Difference]: With dead ends: 1390 [2022-03-20 00:51:57,780 INFO L226 Difference]: Without dead ends: 1383 [2022-03-20 00:51:57,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 95.6s TimeCoverageRelationStatistics Valid=179, Invalid=1302, Unknown=1, NotChecked=0, Total=1482 [2022-03-20 00:51:57,781 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 71 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 80 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:51:57,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 856 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1225 Invalid, 3 Unknown, 0 Unchecked, 15.1s Time] [2022-03-20 00:51:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-03-20 00:51:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1356. [2022-03-20 00:51:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 651 states have (on average 1.3118279569892473) internal successors, (854), 654 states have internal predecessors, (854), 659 states have call successors, (659), 46 states have call predecessors, (659), 45 states have return successors, (657), 655 states have call predecessors, (657), 657 states have call successors, (657) [2022-03-20 00:51:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 2170 transitions. [2022-03-20 00:51:58,565 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 2170 transitions. Word has length 138 [2022-03-20 00:51:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:51:58,566 INFO L478 AbstractCegarLoop]: Abstraction has 1356 states and 2170 transitions. [2022-03-20 00:51:58,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2022-03-20 00:51:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 2170 transitions. [2022-03-20 00:51:58,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 00:51:58,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:51:58,568 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:51:58,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 00:51:58,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:58,783 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:51:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:51:58,784 INFO L85 PathProgramCache]: Analyzing trace with hash -20730755, now seen corresponding path program 3 times [2022-03-20 00:51:58,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:51:58,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179155046] [2022-03-20 00:51:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:51:58,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:51:58,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:51:58,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078251498] [2022-03-20 00:51:58,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:51:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:51:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:51:58,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:51:58,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 00:51:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-20 00:51:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:51:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 00:51:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:52:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 00:52:00,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:52:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-20 00:52:04,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:52:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179155046] [2022-03-20 00:52:04,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:52:04,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078251498] [2022-03-20 00:52:04,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078251498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:52:04,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:52:04,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2022-03-20 00:52:04,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689650201] [2022-03-20 00:52:04,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:52:04,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 00:52:04,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:52:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 00:52:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 00:52:04,239 INFO L87 Difference]: Start difference. First operand 1356 states and 2170 transitions. Second operand has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-03-20 00:52:13,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:17,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:22,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:33,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:37,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:49,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:52:51,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:53:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:53:52,304 INFO L93 Difference]: Finished difference Result 2262 states and 3622 transitions. [2022-03-20 00:53:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-20 00:53:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 141 [2022-03-20 00:53:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:53:52,315 INFO L225 Difference]: With dead ends: 2262 [2022-03-20 00:53:52,315 INFO L226 Difference]: Without dead ends: 2254 [2022-03-20 00:53:52,320 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8545 ImplicationChecksByTransitivity, 57.5s TimeCoverageRelationStatistics Valid=3882, Invalid=20298, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 00:53:52,321 INFO L913 BasicCegarLoop]: 151 mSDtfsCounter, 357 mSDsluCounter, 1417 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 1057 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1057 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:53:52,321 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1568 Invalid, 4336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1057 Valid, 3273 Invalid, 6 Unknown, 0 Unchecked, 52.2s Time] [2022-03-20 00:53:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2022-03-20 00:53:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1643. [2022-03-20 00:53:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 797 states have (on average 1.3074027603513174) internal successors, (1042), 801 states have internal predecessors, (1042), 793 states have call successors, (793), 53 states have call predecessors, (793), 52 states have return successors, (791), 788 states have call predecessors, (791), 791 states have call successors, (791) [2022-03-20 00:53:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2626 transitions. [2022-03-20 00:53:53,553 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2626 transitions. Word has length 141 [2022-03-20 00:53:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:53:53,554 INFO L478 AbstractCegarLoop]: Abstraction has 1643 states and 2626 transitions. [2022-03-20 00:53:53,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 32 states have internal predecessors, (73), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2022-03-20 00:53:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2626 transitions. [2022-03-20 00:53:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 00:53:53,556 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:53:53,557 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:53:53,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 00:53:53,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-20 00:53:53,775 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:53:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:53:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1824189762, now seen corresponding path program 4 times [2022-03-20 00:53:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:53:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76499080] [2022-03-20 00:53:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:53:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:53:53,784 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:53:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109995162] [2022-03-20 00:53:53,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:53:53,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:53:53,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:53:53,787 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:53:53,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 00:53:53,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:53:53,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:53:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 00:53:53,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:53:56,434 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:53:56,436 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:53:56,439 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:53:59,226 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 133 proven. 115 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-20 00:53:59,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:54:00,314 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:54:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:54:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76499080] [2022-03-20 00:54:01,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:54:01,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109995162] [2022-03-20 00:54:01,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109995162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:54:01,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:54:01,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-20 00:54:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772720004] [2022-03-20 00:54:01,697 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:54:01,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 00:54:01,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:54:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 00:54:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-03-20 00:54:01,699 INFO L87 Difference]: Start difference. First operand 1643 states and 2626 transitions. Second operand has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:54:11,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:54:13,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:54:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:54:15,185 INFO L93 Difference]: Finished difference Result 1890 states and 3015 transitions. [2022-03-20 00:54:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 00:54:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2022-03-20 00:54:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:54:15,195 INFO L225 Difference]: With dead ends: 1890 [2022-03-20 00:54:15,195 INFO L226 Difference]: Without dead ends: 1883 [2022-03-20 00:54:15,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 00:54:15,196 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 90 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 91 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:54:15,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1016 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1541 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2022-03-20 00:54:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-03-20 00:54:16,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1850. [2022-03-20 00:54:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 888 states have (on average 1.3141891891891893) internal successors, (1167), 892 states have internal predecessors, (1167), 905 states have call successors, (905), 57 states have call predecessors, (905), 56 states have return successors, (903), 900 states have call predecessors, (903), 903 states have call successors, (903) [2022-03-20 00:54:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 2975 transitions. [2022-03-20 00:54:16,575 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 2975 transitions. Word has length 143 [2022-03-20 00:54:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:54:16,576 INFO L478 AbstractCegarLoop]: Abstraction has 1850 states and 2975 transitions. [2022-03-20 00:54:16,576 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-20 00:54:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 2975 transitions. [2022-03-20 00:54:16,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 00:54:16,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:54:16,580 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:54:16,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 00:54:16,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-20 00:54:16,791 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:54:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:54:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1428542047, now seen corresponding path program 5 times [2022-03-20 00:54:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:54:16,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589059939] [2022-03-20 00:54:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:54:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:54:16,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:54:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101680369] [2022-03-20 00:54:16,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 00:54:16,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:54:16,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:54:16,801 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:54:16,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 00:54:16,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-20 00:54:16,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:54:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-20 00:54:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:54:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 75 proven. 111 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2022-03-20 00:54:20,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:54:31,144 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:54:31,148 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:54:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:54:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589059939] [2022-03-20 00:54:34,654 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:54:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101680369] [2022-03-20 00:54:34,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101680369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:54:34,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:54:34,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 00:54:34,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292808964] [2022-03-20 00:54:34,655 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:54:34,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 00:54:34,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:54:34,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 00:54:34,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 00:54:34,656 INFO L87 Difference]: Start difference. First operand 1850 states and 2975 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:54:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:54:40,568 INFO L93 Difference]: Finished difference Result 2248 states and 3614 transitions. [2022-03-20 00:54:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 00:54:40,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2022-03-20 00:54:40,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:54:40,576 INFO L225 Difference]: With dead ends: 2248 [2022-03-20 00:54:40,576 INFO L226 Difference]: Without dead ends: 2241 [2022-03-20 00:54:40,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=403, Invalid=2567, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 00:54:40,578 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 107 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1580 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:54:40,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 886 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1580 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 00:54:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-03-20 00:54:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 2209. [2022-03-20 00:54:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 1046 states have (on average 1.3221797323135756) internal successors, (1383), 1050 states have internal predecessors, (1383), 1097 states have call successors, (1097), 66 states have call predecessors, (1097), 65 states have return successors, (1095), 1092 states have call predecessors, (1095), 1095 states have call successors, (1095) [2022-03-20 00:54:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3575 transitions. [2022-03-20 00:54:42,261 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3575 transitions. Word has length 160 [2022-03-20 00:54:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:54:42,261 INFO L478 AbstractCegarLoop]: Abstraction has 2209 states and 3575 transitions. [2022-03-20 00:54:42,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 8 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:54:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3575 transitions. [2022-03-20 00:54:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 00:54:42,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:54:42,266 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:54:42,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 00:54:42,472 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:54:42,472 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:54:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:54:42,472 INFO L85 PathProgramCache]: Analyzing trace with hash -241114114, now seen corresponding path program 6 times [2022-03-20 00:54:42,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:54:42,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42943746] [2022-03-20 00:54:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:54:42,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:54:42,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:54:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587279503] [2022-03-20 00:54:42,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 00:54:42,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:54:42,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:54:42,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:54:42,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 00:54:43,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-20 00:54:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:54:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-20 00:54:43,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:54:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 58 proven. 198 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 00:54:48,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:55:01,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:55:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42943746] [2022-03-20 00:55:01,532 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:55:01,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587279503] [2022-03-20 00:55:01,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587279503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:55:01,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:55:01,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-20 00:55:01,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067881346] [2022-03-20 00:55:01,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:55:01,533 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 00:55:01,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:55:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 00:55:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1067, Unknown=1, NotChecked=0, Total=1190 [2022-03-20 00:55:01,534 INFO L87 Difference]: Start difference. First operand 2209 states and 3575 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 00:55:28,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:55:50,202 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:55:55,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:55:57,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:01,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:06,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:08,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:30,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:31,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:42,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:51,965 WARN L232 SmtUtils]: Spent 6.90s on a formula simplification. DAG size of input: 51 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:56:52,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:54,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:57,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:56:59,209 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:57:00,569 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:57:08,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:57:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:18,301 INFO L93 Difference]: Finished difference Result 2930 states and 4732 transitions. [2022-03-20 00:57:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 00:57:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) Word has length 168 [2022-03-20 00:57:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:18,314 INFO L225 Difference]: With dead ends: 2930 [2022-03-20 00:57:18,314 INFO L226 Difference]: Without dead ends: 2922 [2022-03-20 00:57:18,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 78.1s TimeCoverageRelationStatistics Valid=836, Invalid=5012, Unknown=4, NotChecked=0, Total=5852 [2022-03-20 00:57:18,316 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 135 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 2952 mSolverCounterSat, 420 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 3377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2952 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:18,317 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 1613 Invalid, 3377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2952 Invalid, 5 Unknown, 0 Unchecked, 72.1s Time] [2022-03-20 00:57:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2022-03-20 00:57:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2709. [2022-03-20 00:57:20,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 1280 states have (on average 1.3234375) internal successors, (1694), 1286 states have internal predecessors, (1694), 1353 states have call successors, (1353), 76 states have call predecessors, (1353), 75 states have return successors, (1351), 1346 states have call predecessors, (1351), 1351 states have call successors, (1351) [2022-03-20 00:57:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 4398 transitions. [2022-03-20 00:57:20,418 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 4398 transitions. Word has length 168 [2022-03-20 00:57:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:20,419 INFO L478 AbstractCegarLoop]: Abstraction has 2709 states and 4398 transitions. [2022-03-20 00:57:20,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-03-20 00:57:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 4398 transitions. [2022-03-20 00:57:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-03-20 00:57:20,422 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:20,422 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:20,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:20,628 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:20,629 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:20,629 INFO L85 PathProgramCache]: Analyzing trace with hash 531100650, now seen corresponding path program 7 times [2022-03-20 00:57:20,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:20,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862914016] [2022-03-20 00:57:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:20,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:20,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:20,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265359453] [2022-03-20 00:57:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 00:57:20,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:20,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:20,641 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:20,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 00:57:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:57:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 00:57:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 89 proven. 167 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2022-03-20 00:57:22,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:22,662 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:57:24,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862914016] [2022-03-20 00:57:24,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:24,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265359453] [2022-03-20 00:57:24,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265359453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:57:24,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:57:24,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-20 00:57:24,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429095729] [2022-03-20 00:57:24,061 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:57:24,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 00:57:24,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 00:57:24,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-20 00:57:24,062 INFO L87 Difference]: Start difference. First operand 2709 states and 4398 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:57:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:57:32,194 INFO L93 Difference]: Finished difference Result 3142 states and 5089 transitions. [2022-03-20 00:57:32,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 00:57:32,196 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 168 [2022-03-20 00:57:32,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:57:32,210 INFO L225 Difference]: With dead ends: 3142 [2022-03-20 00:57:32,210 INFO L226 Difference]: Without dead ends: 3135 [2022-03-20 00:57:32,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 00:57:32,212 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 99 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:57:32,212 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 1325 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 00:57:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2022-03-20 00:57:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 3093. [2022-03-20 00:57:34,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 1452 states have (on average 1.3278236914600552) internal successors, (1928), 1458 states have internal predecessors, (1928), 1557 states have call successors, (1557), 84 states have call predecessors, (1557), 83 states have return successors, (1555), 1550 states have call predecessors, (1555), 1555 states have call successors, (1555) [2022-03-20 00:57:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 5040 transitions. [2022-03-20 00:57:34,667 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 5040 transitions. Word has length 168 [2022-03-20 00:57:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:57:34,668 INFO L478 AbstractCegarLoop]: Abstraction has 3093 states and 5040 transitions. [2022-03-20 00:57:34,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 22 states have internal predecessors, (53), 8 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:57:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 5040 transitions. [2022-03-20 00:57:34,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 00:57:34,673 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:57:34,673 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:57:34,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 00:57:34,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 00:57:34,887 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:57:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:57:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1697967400, now seen corresponding path program 8 times [2022-03-20 00:57:34,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:57:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319041714] [2022-03-20 00:57:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:57:34,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:57:34,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:57:34,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543646865] [2022-03-20 00:57:34,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:57:34,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:57:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:57:34,901 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:57:34,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 00:57:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:57:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:57:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-20 00:57:35,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:57:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 103 proven. 221 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2022-03-20 00:57:36,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:43,223 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:57:43,369 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 173 proven. 84 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2022-03-20 00:57:43,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:57:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319041714] [2022-03-20 00:57:43,370 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:57:43,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543646865] [2022-03-20 00:57:43,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543646865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:57:43,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:57:43,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 38 [2022-03-20 00:57:43,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106603104] [2022-03-20 00:57:43,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:57:43,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 00:57:43,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:57:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 00:57:43,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 00:57:43,372 INFO L87 Difference]: Start difference. First operand 3093 states and 5040 transitions. Second operand has 38 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 37 states have internal predecessors, (91), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 12 states have call successors, (44) [2022-03-20 00:58:03,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:10,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:14,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:17,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:24,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:35,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:58:57,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:04,150 WARN L232 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:07,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:09,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:16,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:19,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:59:21,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []