/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 02:07:45,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 02:07:45,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 02:07:45,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 02:07:45,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 02:07:45,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 02:07:45,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 02:07:45,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 02:07:45,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 02:07:45,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 02:07:45,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 02:07:45,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 02:07:45,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 02:07:45,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 02:07:45,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 02:07:45,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 02:07:45,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 02:07:45,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 02:07:45,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 02:07:45,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 02:07:45,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 02:07:45,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 02:07:45,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 02:07:45,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 02:07:45,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 02:07:45,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 02:07:45,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 02:07:45,078 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 02:07:45,079 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 02:07:45,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 02:07:45,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 02:07:45,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 02:07:45,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 02:07:45,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 02:07:45,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 02:07:45,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 02:07:45,092 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 [2023-04-02 02:07:45,123 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 02:07:45,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 02:07:45,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 02:07:45,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 02:07:45,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 02:07:45,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 02:07:45,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 02:07:45,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 02:07:45,126 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 02:07:45,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 02:07:45,127 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 02:07:45,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 02:07:45,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:07:45,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 02:07:45,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 02:07:45,130 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 02:07:45,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 02:07:45,130 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 02:07:45,130 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 02:07:45,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 02:07:45,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 02:07:45,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 02:07:45,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 02:07:45,344 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 02:07:45,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-04-02 02:07:46,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 02:07:46,601 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 02:07:46,601 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-04-02 02:07:46,606 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f484e9e64/eb75b1222bdc4233a4679ee454dc745e/FLAGe37eb2d86 [2023-04-02 02:07:46,619 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f484e9e64/eb75b1222bdc4233a4679ee454dc745e [2023-04-02 02:07:46,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 02:07:46,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 02:07:46,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 02:07:46,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 02:07:46,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 02:07:46,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d62e78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46, skipping insertion in model container [2023-04-02 02:07:46,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 02:07:46,653 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 02:07:46,786 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-04-02 02:07:46,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:07:46,830 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 02:07:46,838 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2023-04-02 02:07:46,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 02:07:46,855 INFO L208 MainTranslator]: Completed translation [2023-04-02 02:07:46,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46 WrapperNode [2023-04-02 02:07:46,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 02:07:46,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 02:07:46,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 02:07:46,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 02:07:46,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,878 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 02:07:46,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 02:07:46,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 02:07:46,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 02:07:46,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (1/1) ... [2023-04-02 02:07:46,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 02:07:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:46,910 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) [2023-04-02 02:07:46,931 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 [2023-04-02 02:07:46,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 02:07:46,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 02:07:46,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 02:07:46,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 02:07:46,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 02:07:46,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 02:07:46,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 02:07:46,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 02:07:47,015 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 02:07:47,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 02:07:47,316 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 02:07:47,322 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 02:07:47,322 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 02:07:47,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:07:47 BoogieIcfgContainer [2023-04-02 02:07:47,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 02:07:47,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 02:07:47,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 02:07:47,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 02:07:47,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:07:46" (1/3) ... [2023-04-02 02:07:47,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b375ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:07:47, skipping insertion in model container [2023-04-02 02:07:47,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:07:46" (2/3) ... [2023-04-02 02:07:47,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b375ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:07:47, skipping insertion in model container [2023-04-02 02:07:47,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:07:47" (3/3) ... [2023-04-02 02:07:47,331 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-04-02 02:07:47,346 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 02:07:47,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 02:07:47,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 02:07:47,407 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@44e687e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 02:07:47,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 02:07:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-02 02:07:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-02 02:07:47,416 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:47,416 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-04-02 02:07:47,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:47,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2023-04-02 02:07:47,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:47,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076282838] [2023-04-02 02:07:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:47,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:47,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076282838] [2023-04-02 02:07:47,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 02:07:47,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617345963] [2023-04-02 02:07:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:47,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:47,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:47,545 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) [2023-04-02 02:07:47,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 02:07:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:47,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 02:07:47,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 02:07:47,647 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:07:47,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617345963] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:07:47,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:07:47,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 02:07:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67306454] [2023-04-02 02:07:47,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:47,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 02:07:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:47,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 02:07:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:07:47,677 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:47,696 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2023-04-02 02:07:47,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 02:07:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2023-04-02 02:07:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:47,703 INFO L225 Difference]: With dead ends: 73 [2023-04-02 02:07:47,703 INFO L226 Difference]: Without dead ends: 35 [2023-04-02 02:07:47,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 02:07:47,709 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-02 02:07:47,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-02 02:07:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:07:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2023-04-02 02:07:47,742 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2023-04-02 02:07:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:47,743 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2023-04-02 02:07:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2023-04-02 02:07:47,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-04-02 02:07:47,745 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:47,745 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-04-02 02:07:47,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:47,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 02:07:47,951 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:47,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:47,952 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2023-04-02 02:07:47,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:47,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863056947] [2023-04-02 02:07:47,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:47,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:47,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:47,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575022000] [2023-04-02 02:07:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:47,989 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) [2023-04-02 02:07:47,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 02:07:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:48,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 02:07:48,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:07:48,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:07:48,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863056947] [2023-04-02 02:07:48,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575022000] [2023-04-02 02:07:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575022000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:48,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-04-02 02:07:48,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051472832] [2023-04-02 02:07:48,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:48,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:07:48,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:07:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:07:48,328 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:48,488 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-04-02 02:07:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:48,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2023-04-02 02:07:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:48,492 INFO L225 Difference]: With dead ends: 52 [2023-04-02 02:07:48,492 INFO L226 Difference]: Without dead ends: 44 [2023-04-02 02:07:48,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:07:48,496 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:48,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 136 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-02 02:07:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-04-02 02:07:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:07:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-04-02 02:07:48,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2023-04-02 02:07:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:48,529 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-04-02 02:07:48,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-02 02:07:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-04-02 02:07:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-02 02:07:48,533 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:48,533 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-04-02 02:07:48,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:48,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 02:07:48,740 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:48,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:48,741 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2023-04-02 02:07:48,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295344298] [2023-04-02 02:07:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:48,773 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:48,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235522773] [2023-04-02 02:07:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:48,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:48,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:48,783 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) [2023-04-02 02:07:48,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 02:07:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:48,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 02:07:48,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 02:07:48,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:07:49,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:49,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295344298] [2023-04-02 02:07:49,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235522773] [2023-04-02 02:07:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235522773] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:49,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-04-02 02:07:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634850642] [2023-04-02 02:07:49,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:49,049 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 02:07:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:49,099 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2023-04-02 02:07:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2023-04-02 02:07:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:49,103 INFO L225 Difference]: With dead ends: 43 [2023-04-02 02:07:49,103 INFO L226 Difference]: Without dead ends: 41 [2023-04-02 02:07:49,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:49,107 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:49,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 136 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-02 02:07:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-04-02 02:07:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-02 02:07:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2023-04-02 02:07:49,118 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2023-04-02 02:07:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:49,118 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2023-04-02 02:07:49,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-04-02 02:07:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2023-04-02 02:07:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-02 02:07:49,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:49,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-04-02 02:07:49,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:49,325 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:49,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2023-04-02 02:07:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496769599] [2023-04-02 02:07:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:49,342 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:49,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477911377] [2023-04-02 02:07:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:49,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:49,349 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) [2023-04-02 02:07:49,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 02:07:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:49,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 02:07:49,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 02:07:49,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-04-02 02:07:49,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496769599] [2023-04-02 02:07:49,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477911377] [2023-04-02 02:07:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477911377] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:49,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:49,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-04-02 02:07:49,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439872224] [2023-04-02 02:07:49,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:49,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:49,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:49,716 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-02 02:07:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:49,764 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-02 02:07:49,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 50 [2023-04-02 02:07:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:49,768 INFO L225 Difference]: With dead ends: 54 [2023-04-02 02:07:49,768 INFO L226 Difference]: Without dead ends: 52 [2023-04-02 02:07:49,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:49,769 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:49,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 145 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-02 02:07:49,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-04-02 02:07:49,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:07:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-04-02 02:07:49,781 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2023-04-02 02:07:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:49,781 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-04-02 02:07:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-02 02:07:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-04-02 02:07:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-02 02:07:49,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:49,783 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-04-02 02:07:49,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:49,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:49,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:49,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2023-04-02 02:07:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:49,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692256710] [2023-04-02 02:07:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:50,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:50,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829933263] [2023-04-02 02:07:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:50,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:50,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:50,017 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) [2023-04-02 02:07:50,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 02:07:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:50,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-02 02:07:50,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-02 02:07:50,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-04-02 02:07:50,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692256710] [2023-04-02 02:07:50,401 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:50,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829933263] [2023-04-02 02:07:50,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829933263] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:50,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:50,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-04-02 02:07:50,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525871521] [2023-04-02 02:07:50,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:07:50,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:07:50,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:50,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:07:50,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:50,402 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 02:07:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:50,456 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2023-04-02 02:07:50,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:07:50,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2023-04-02 02:07:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:50,457 INFO L225 Difference]: With dead ends: 58 [2023-04-02 02:07:50,457 INFO L226 Difference]: Without dead ends: 56 [2023-04-02 02:07:50,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:50,458 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:50,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:07:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-02 02:07:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-04-02 02:07:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:07:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2023-04-02 02:07:50,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2023-04-02 02:07:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:50,470 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2023-04-02 02:07:50,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-02 02:07:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2023-04-02 02:07:50,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 02:07:50,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:50,471 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-04-02 02:07:50,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-02 02:07:50,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:50,677 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:50,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:50,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2023-04-02 02:07:50,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:50,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243053580] [2023-04-02 02:07:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:50,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:50,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:50,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352313530] [2023-04-02 02:07:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:50,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:50,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:50,692 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) [2023-04-02 02:07:50,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 02:07:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:50,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-02 02:07:50,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-02 02:07:50,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:50,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243053580] [2023-04-02 02:07:50,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:50,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352313530] [2023-04-02 02:07:50,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352313530] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:50,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:50,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-04-02 02:07:50,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420807247] [2023-04-02 02:07:50,983 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:50,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-02 02:07:50,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:50,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-02 02:07:50,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-04-02 02:07:50,985 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 02:07:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:51,094 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2023-04-02 02:07:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 02:07:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2023-04-02 02:07:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:51,100 INFO L225 Difference]: With dead ends: 62 [2023-04-02 02:07:51,100 INFO L226 Difference]: Without dead ends: 60 [2023-04-02 02:07:51,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-02 02:07:51,101 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:51,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:51,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-02 02:07:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-04-02 02:07:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-02 02:07:51,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-04-02 02:07:51,125 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2023-04-02 02:07:51,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:51,126 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-04-02 02:07:51,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-02 02:07:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-04-02 02:07:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-02 02:07:51,132 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:51,132 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:51,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:51,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:51,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:51,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:51,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2023-04-02 02:07:51,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701091208] [2023-04-02 02:07:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:51,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:51,368 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:51,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183379241] [2023-04-02 02:07:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:51,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:51,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:51,372 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) [2023-04-02 02:07:51,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 02:07:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:51,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-02 02:07:51,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 02:07:51,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-02 02:07:51,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:51,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701091208] [2023-04-02 02:07:51,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:51,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183379241] [2023-04-02 02:07:51,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183379241] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:51,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:51,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-04-02 02:07:51,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144541792] [2023-04-02 02:07:51,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:51,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-02 02:07:51,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:51,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-02 02:07:51,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-02 02:07:51,585 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 02:07:51,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:51,760 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2023-04-02 02:07:51,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 02:07:51,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2023-04-02 02:07:51,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:51,762 INFO L225 Difference]: With dead ends: 106 [2023-04-02 02:07:51,762 INFO L226 Difference]: Without dead ends: 98 [2023-04-02 02:07:51,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-04-02 02:07:51,765 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 36 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:51,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 183 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 02:07:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-02 02:07:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2023-04-02 02:07:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2023-04-02 02:07:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2023-04-02 02:07:51,806 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2023-04-02 02:07:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:51,806 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2023-04-02 02:07:51,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-02 02:07:51,807 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2023-04-02 02:07:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 02:07:51,809 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:51,809 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:51,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:52,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:52,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:52,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2023-04-02 02:07:52,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313110819] [2023-04-02 02:07:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:52,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:52,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930718657] [2023-04-02 02:07:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:52,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:52,034 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) [2023-04-02 02:07:52,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 02:07:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:52,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-02 02:07:52,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-04-02 02:07:52,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-02 02:07:52,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:52,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313110819] [2023-04-02 02:07:52,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:52,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930718657] [2023-04-02 02:07:52,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930718657] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:52,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:52,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 02:07:52,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677597320] [2023-04-02 02:07:52,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:52,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 02:07:52,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 02:07:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-04-02 02:07:52,353 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 02:07:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:52,670 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2023-04-02 02:07:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 02:07:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2023-04-02 02:07:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:52,673 INFO L225 Difference]: With dead ends: 132 [2023-04-02 02:07:52,673 INFO L226 Difference]: Without dead ends: 128 [2023-04-02 02:07:52,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:07:52,674 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:52,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 295 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 02:07:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-04-02 02:07:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2023-04-02 02:07:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2023-04-02 02:07:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2023-04-02 02:07:52,702 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2023-04-02 02:07:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:52,702 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2023-04-02 02:07:52,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 6 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-02 02:07:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2023-04-02 02:07:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 02:07:52,703 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:52,704 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:07:52,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:52,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-04-02 02:07:52,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:52,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:52,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2023-04-02 02:07:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:52,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413036687] [2023-04-02 02:07:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:52,927 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:52,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512534954] [2023-04-02 02:07:52,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:07:52,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:52,929 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) [2023-04-02 02:07:52,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 02:07:53,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:07:53,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:53,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 02:07:53,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:53,371 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-04-02 02:07:53,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-04-02 02:07:53,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:53,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413036687] [2023-04-02 02:07:53,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:53,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512534954] [2023-04-02 02:07:53,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512534954] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:53,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:53,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2023-04-02 02:07:53,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230994019] [2023-04-02 02:07:53,587 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:53,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 02:07:53,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:53,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 02:07:53,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-04-02 02:07:53,589 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-04-02 02:07:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:55,201 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2023-04-02 02:07:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-02 02:07:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 80 [2023-04-02 02:07:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:55,203 INFO L225 Difference]: With dead ends: 138 [2023-04-02 02:07:55,203 INFO L226 Difference]: Without dead ends: 136 [2023-04-02 02:07:55,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:07:55,204 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 86 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:55,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 236 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-02 02:07:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-02 02:07:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2023-04-02 02:07:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 67 states have internal predecessors, (76), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-04-02 02:07:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 154 transitions. [2023-04-02 02:07:55,234 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 154 transitions. Word has length 80 [2023-04-02 02:07:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:55,235 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 154 transitions. [2023-04-02 02:07:55,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 16 states have internal predecessors, (39), 8 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-04-02 02:07:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 154 transitions. [2023-04-02 02:07:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 02:07:55,236 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:55,236 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2023-04-02 02:07:55,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 02:07:55,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:55,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:55,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:55,442 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2023-04-02 02:07:55,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:55,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485929039] [2023-04-02 02:07:55,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:55,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:55,451 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615166667] [2023-04-02 02:07:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:07:55,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:55,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:55,461 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) [2023-04-02 02:07:55,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 02:07:55,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:07:55,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:07:55,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-02 02:07:55,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-04-02 02:07:55,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:56,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:56,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485929039] [2023-04-02 02:07:56,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:56,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615166667] [2023-04-02 02:07:56,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615166667] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:07:56,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:07:56,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 02:07:56,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967316586] [2023-04-02 02:07:56,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 02:07:56,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 02:07:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-04-02 02:07:56,258 INFO L87 Difference]: Start difference. First operand 117 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 02:07:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:07:57,289 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2023-04-02 02:07:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 02:07:57,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2023-04-02 02:07:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:07:57,292 INFO L225 Difference]: With dead ends: 153 [2023-04-02 02:07:57,292 INFO L226 Difference]: Without dead ends: 151 [2023-04-02 02:07:57,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:07:57,293 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:07:57,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 188 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 02:07:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-04-02 02:07:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2023-04-02 02:07:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 86 states have internal predecessors, (97), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2023-04-02 02:07:57,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 191 transitions. [2023-04-02 02:07:57,332 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 191 transitions. Word has length 85 [2023-04-02 02:07:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:07:57,333 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 191 transitions. [2023-04-02 02:07:57,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2023-04-02 02:07:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 191 transitions. [2023-04-02 02:07:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-04-02 02:07:57,334 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:07:57,334 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2023-04-02 02:07:57,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-04-02 02:07:57,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-02 02:07:57,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:07:57,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:07:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2023-04-02 02:07:57,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:07:57,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419797475] [2023-04-02 02:07:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:57,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:07:57,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:07:57,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952735545] [2023-04-02 02:07:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:07:57,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:07:57,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:07:57,554 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) [2023-04-02 02:07:57,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 02:07:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:07:57,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-02 02:07:57,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:07:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-04-02 02:07:58,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:07:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-04-02 02:07:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:07:58,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419797475] [2023-04-02 02:07:58,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:07:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952735545] [2023-04-02 02:07:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952735545] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:07:58,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:07:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-04-02 02:07:58,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24487845] [2023-04-02 02:07:58,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:07:58,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 02:07:58,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:07:58,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 02:07:58,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:07:58,986 INFO L87 Difference]: Start difference. First operand 148 states and 191 transitions. Second operand has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 02:08:06,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:08:06,788 INFO L93 Difference]: Finished difference Result 238 states and 326 transitions. [2023-04-02 02:08:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 02:08:06,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 91 [2023-04-02 02:08:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:08:06,790 INFO L225 Difference]: With dead ends: 238 [2023-04-02 02:08:06,790 INFO L226 Difference]: Without dead ends: 230 [2023-04-02 02:08:06,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-04-02 02:08:06,791 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 95 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:08:06,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 361 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 02:08:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-04-02 02:08:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2023-04-02 02:08:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 123 states have (on average 1.1788617886178863) internal successors, (145), 125 states have internal predecessors, (145), 84 states have call successors, (84), 19 states have call predecessors, (84), 18 states have return successors, (82), 81 states have call predecessors, (82), 82 states have call successors, (82) [2023-04-02 02:08:06,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 311 transitions. [2023-04-02 02:08:06,870 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 311 transitions. Word has length 91 [2023-04-02 02:08:06,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:08:06,870 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 311 transitions. [2023-04-02 02:08:06,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-02 02:08:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 311 transitions. [2023-04-02 02:08:06,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-04-02 02:08:06,871 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:08:06,871 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:08:06,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-02 02:08:07,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 02:08:07,077 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:08:07,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:08:07,078 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2023-04-02 02:08:07,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:08:07,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684424687] [2023-04-02 02:08:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:07,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:08:07,089 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:08:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45185293] [2023-04-02 02:08:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:08:07,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:08:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:08:07,091 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) [2023-04-02 02:08:07,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-02 02:08:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 02:08:07,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 54 conjunts are in the unsatisfiable core [2023-04-02 02:08:07,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:08:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-04-02 02:08:07,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:08:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-04-02 02:08:10,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:08:10,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684424687] [2023-04-02 02:08:10,975 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:08:10,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45185293] [2023-04-02 02:08:10,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45185293] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:08:10,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:08:10,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-04-02 02:08:10,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291705996] [2023-04-02 02:08:10,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:08:10,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-02 02:08:10,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:08:10,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-02 02:08:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-04-02 02:08:10,977 INFO L87 Difference]: Start difference. First operand 226 states and 311 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 02:08:24,943 WARN L223 SmtUtils]: Spent 11.75s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:08:31,847 WARN L223 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 02:08:46,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:08:50,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 02:08:59,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:08:59,719 INFO L93 Difference]: Finished difference Result 285 states and 397 transitions. [2023-04-02 02:08:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-02 02:08:59,720 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 107 [2023-04-02 02:08:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:08:59,722 INFO L225 Difference]: With dead ends: 285 [2023-04-02 02:08:59,722 INFO L226 Difference]: Without dead ends: 283 [2023-04-02 02:08:59,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 41.5s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-04-02 02:08:59,723 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 85 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-04-02 02:08:59,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 219 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 657 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2023-04-02 02:08:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-04-02 02:08:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 271. [2023-04-02 02:08:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 148 states have (on average 1.1756756756756757) internal successors, (174), 153 states have internal predecessors, (174), 103 states have call successors, (103), 20 states have call predecessors, (103), 19 states have return successors, (101), 97 states have call predecessors, (101), 101 states have call successors, (101) [2023-04-02 02:08:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 378 transitions. [2023-04-02 02:08:59,856 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 378 transitions. Word has length 107 [2023-04-02 02:08:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:08:59,856 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 378 transitions. [2023-04-02 02:08:59,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 19 states have internal predecessors, (45), 11 states have call successors, (35), 3 states have call predecessors, (35), 3 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2023-04-02 02:08:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 378 transitions. [2023-04-02 02:08:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-04-02 02:08:59,858 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:08:59,858 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:08:59,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-02 02:09:00,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-02 02:09:00,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:00,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1979573154, now seen corresponding path program 4 times [2023-04-02 02:09:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:00,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099353867] [2023-04-02 02:09:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:00,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:00,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65528517] [2023-04-02 02:09:00,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:09:00,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:00,082 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) [2023-04-02 02:09:00,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-02 02:09:00,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:09:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:00,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 02:09:00,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-02 02:09:00,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 02:09:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099353867] [2023-04-02 02:09:00,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:00,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65528517] [2023-04-02 02:09:00,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65528517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 02:09:00,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 02:09:00,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 02:09:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758947623] [2023-04-02 02:09:00,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 02:09:00,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 02:09:00,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:00,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 02:09:00,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 02:09:00,179 INFO L87 Difference]: Start difference. First operand 271 states and 378 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 02:09:00,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:00,365 INFO L93 Difference]: Finished difference Result 354 states and 492 transitions. [2023-04-02 02:09:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 02:09:00,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2023-04-02 02:09:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:00,367 INFO L225 Difference]: With dead ends: 354 [2023-04-02 02:09:00,367 INFO L226 Difference]: Without dead ends: 240 [2023-04-02 02:09:00,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-02 02:09:00,369 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:00,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 157 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 02:09:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-04-02 02:09:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 223. [2023-04-02 02:09:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 123 states have (on average 1.1300813008130082) internal successors, (139), 126 states have internal predecessors, (139), 80 states have call successors, (80), 20 states have call predecessors, (80), 19 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2023-04-02 02:09:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 297 transitions. [2023-04-02 02:09:00,462 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 297 transitions. Word has length 110 [2023-04-02 02:09:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:00,463 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 297 transitions. [2023-04-02 02:09:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2023-04-02 02:09:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 297 transitions. [2023-04-02 02:09:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-04-02 02:09:00,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:00,464 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1] [2023-04-02 02:09:00,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-02 02:09:00,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-02 02:09:00,669 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:00,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 2 times [2023-04-02 02:09:00,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:00,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420885558] [2023-04-02 02:09:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:00,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:00,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:00,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726936705] [2023-04-02 02:09:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:09:00,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:00,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:00,690 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 02:09:00,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-02 02:09:00,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:09:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:00,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-02 02:09:00,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-04-02 02:09:01,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2023-04-02 02:09:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420885558] [2023-04-02 02:09:02,015 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726936705] [2023-04-02 02:09:02,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726936705] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:02,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:02,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2023-04-02 02:09:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310822538] [2023-04-02 02:09:02,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-02 02:09:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-02 02:09:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-04-02 02:09:02,017 INFO L87 Difference]: Start difference. First operand 223 states and 297 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 02:09:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:11,783 INFO L93 Difference]: Finished difference Result 310 states and 422 transitions. [2023-04-02 02:09:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-02 02:09:11,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 127 [2023-04-02 02:09:11,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:11,786 INFO L225 Difference]: With dead ends: 310 [2023-04-02 02:09:11,787 INFO L226 Difference]: Without dead ends: 308 [2023-04-02 02:09:11,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2023-04-02 02:09:11,788 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 120 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:11,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 298 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-02 02:09:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-04-02 02:09:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 283. [2023-04-02 02:09:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 155 states have (on average 1.1290322580645162) internal successors, (175), 159 states have internal predecessors, (175), 104 states have call successors, (104), 24 states have call predecessors, (104), 23 states have return successors, (102), 99 states have call predecessors, (102), 102 states have call successors, (102) [2023-04-02 02:09:11,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 381 transitions. [2023-04-02 02:09:11,925 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 381 transitions. Word has length 127 [2023-04-02 02:09:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:11,925 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 381 transitions. [2023-04-02 02:09:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 22 states have internal predecessors, (50), 12 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-04-02 02:09:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 381 transitions. [2023-04-02 02:09:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-04-02 02:09:11,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:11,927 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2023-04-02 02:09:11,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-04-02 02:09:12,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:12,133 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:12,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 2 times [2023-04-02 02:09:12,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:12,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223229011] [2023-04-02 02:09:12,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:12,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:12,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595786416] [2023-04-02 02:09:12,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 02:09:12,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:12,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:12,146 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) [2023-04-02 02:09:12,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-04-02 02:09:12,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 02:09:12,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:12,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2023-04-02 02:09:12,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-04-02 02:09:12,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-04-02 02:09:14,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223229011] [2023-04-02 02:09:14,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:14,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595786416] [2023-04-02 02:09:14,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595786416] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:14,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:14,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-04-02 02:09:14,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561077455] [2023-04-02 02:09:14,118 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:14,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-02 02:09:14,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:14,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-02 02:09:14,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-04-02 02:09:14,119 INFO L87 Difference]: Start difference. First operand 283 states and 381 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2023-04-02 02:09:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:40,686 INFO L93 Difference]: Finished difference Result 409 states and 575 transitions. [2023-04-02 02:09:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-02 02:09:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) Word has length 138 [2023-04-02 02:09:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:40,689 INFO L225 Difference]: With dead ends: 409 [2023-04-02 02:09:40,689 INFO L226 Difference]: Without dead ends: 401 [2023-04-02 02:09:40,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=855, Invalid=4115, Unknown=0, NotChecked=0, Total=4970 [2023-04-02 02:09:40,691 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 181 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:40,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 470 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-04-02 02:09:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-02 02:09:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 384. [2023-04-02 02:09:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 201 states have (on average 1.1492537313432836) internal successors, (231), 206 states have internal predecessors, (231), 156 states have call successors, (156), 27 states have call predecessors, (156), 26 states have return successors, (154), 150 states have call predecessors, (154), 154 states have call successors, (154) [2023-04-02 02:09:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 541 transitions. [2023-04-02 02:09:40,946 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 541 transitions. Word has length 138 [2023-04-02 02:09:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:40,946 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 541 transitions. [2023-04-02 02:09:40,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 14 states have call successors, (45), 3 states have call predecessors, (45), 2 states have return successors, (43), 12 states have call predecessors, (43), 12 states have call successors, (43) [2023-04-02 02:09:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 541 transitions. [2023-04-02 02:09:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-02 02:09:40,948 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:40,948 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:09:40,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-04-02 02:09:41,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-02 02:09:41,154 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:41,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:41,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 3 times [2023-04-02 02:09:41,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:41,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238268617] [2023-04-02 02:09:41,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:41,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:41,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:41,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696209082] [2023-04-02 02:09:41,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:09:41,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:41,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:41,164 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) [2023-04-02 02:09:41,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-04-02 02:09:41,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 02:09:41,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:41,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 73 conjunts are in the unsatisfiable core [2023-04-02 02:09:41,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 112 proven. 61 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2023-04-02 02:09:42,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:44,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238268617] [2023-04-02 02:09:44,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696209082] [2023-04-02 02:09:44,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696209082] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:44,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:44,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-04-02 02:09:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498891144] [2023-04-02 02:09:44,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:44,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 02:09:44,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:44,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 02:09:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-04-02 02:09:44,505 INFO L87 Difference]: Start difference. First operand 384 states and 541 transitions. Second operand has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 02:09:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:45,846 INFO L93 Difference]: Finished difference Result 423 states and 591 transitions. [2023-04-02 02:09:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 02:09:45,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 154 [2023-04-02 02:09:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:45,849 INFO L225 Difference]: With dead ends: 423 [2023-04-02 02:09:45,849 INFO L226 Difference]: Without dead ends: 421 [2023-04-02 02:09:45,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2023-04-02 02:09:45,850 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:45,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 261 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-02 02:09:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-04-02 02:09:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2023-04-02 02:09:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 219 states have (on average 1.1461187214611872) internal successors, (251), 224 states have internal predecessors, (251), 168 states have call successors, (168), 30 states have call predecessors, (168), 29 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2023-04-02 02:09:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 585 transitions. [2023-04-02 02:09:46,117 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 585 transitions. Word has length 154 [2023-04-02 02:09:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:46,118 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 585 transitions. [2023-04-02 02:09:46,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-04-02 02:09:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 585 transitions. [2023-04-02 02:09:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-04-02 02:09:46,120 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:46,120 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2023-04-02 02:09:46,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-04-02 02:09:46,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-04-02 02:09:46,326 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:46,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 3 times [2023-04-02 02:09:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:46,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962521475] [2023-04-02 02:09:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:46,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:46,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063893375] [2023-04-02 02:09:46,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 02:09:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:46,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:46,336 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) [2023-04-02 02:09:46,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-04-02 02:09:46,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 02:09:46,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:46,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 02:09:46,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 104 proven. 43 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2023-04-02 02:09:47,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:49,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962521475] [2023-04-02 02:09:49,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:49,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063893375] [2023-04-02 02:09:49,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063893375] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:09:49,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:09:49,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-04-02 02:09:49,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564728762] [2023-04-02 02:09:49,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:49,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 02:09:49,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 02:09:49,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-04-02 02:09:49,649 INFO L87 Difference]: Start difference. First operand 417 states and 585 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-02 02:09:50,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:09:50,333 INFO L93 Difference]: Finished difference Result 444 states and 621 transitions. [2023-04-02 02:09:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-02 02:09:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 157 [2023-04-02 02:09:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:09:50,335 INFO L225 Difference]: With dead ends: 444 [2023-04-02 02:09:50,336 INFO L226 Difference]: Without dead ends: 437 [2023-04-02 02:09:50,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=128, Invalid=683, Unknown=1, NotChecked=0, Total=812 [2023-04-02 02:09:50,336 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 02:09:50,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 165 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 02:09:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2023-04-02 02:09:50,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 420. [2023-04-02 02:09:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 220 states have (on average 1.1409090909090909) internal successors, (251), 224 states have internal predecessors, (251), 169 states have call successors, (169), 31 states have call predecessors, (169), 30 states have return successors, (167), 164 states have call predecessors, (167), 167 states have call successors, (167) [2023-04-02 02:09:50,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 587 transitions. [2023-04-02 02:09:50,650 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 587 transitions. Word has length 157 [2023-04-02 02:09:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:09:50,651 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 587 transitions. [2023-04-02 02:09:50,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2023-04-02 02:09:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 587 transitions. [2023-04-02 02:09:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-04-02 02:09:50,653 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:09:50,653 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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] [2023-04-02 02:09:50,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-04-02 02:09:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-04-02 02:09:50,858 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:09:50,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:09:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash -192100217, now seen corresponding path program 4 times [2023-04-02 02:09:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:09:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098697817] [2023-04-02 02:09:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:09:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:09:50,869 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:09:50,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542650810] [2023-04-02 02:09:50,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:09:50,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:09:50,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:09:50,870 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) [2023-04-02 02:09:50,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-04-02 02:09:50,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:09:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:09:50,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 85 conjunts are in the unsatisfiable core [2023-04-02 02:09:50,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:09:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 162 proven. 104 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2023-04-02 02:09:52,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:09:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 108 proven. 86 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2023-04-02 02:09:53,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:09:53,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098697817] [2023-04-02 02:09:53,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:09:53,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542650810] [2023-04-02 02:09:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542650810] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:09:53,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:09:53,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-04-02 02:09:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712933334] [2023-04-02 02:09:53,489 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:09:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-04-02 02:09:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:09:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-04-02 02:09:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 02:09:53,491 INFO L87 Difference]: Start difference. First operand 420 states and 587 transitions. Second operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 29 states have internal predecessors, (63), 19 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (55), 19 states have call predecessors, (55), 17 states have call successors, (55) [2023-04-02 02:10:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:10:01,689 INFO L93 Difference]: Finished difference Result 507 states and 715 transitions. [2023-04-02 02:10:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-02 02:10:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 29 states have internal predecessors, (63), 19 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (55), 19 states have call predecessors, (55), 17 states have call successors, (55) Word has length 171 [2023-04-02 02:10:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:10:01,691 INFO L225 Difference]: With dead ends: 507 [2023-04-02 02:10:01,692 INFO L226 Difference]: Without dead ends: 505 [2023-04-02 02:10:01,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=688, Invalid=3218, Unknown=0, NotChecked=0, Total=3906 [2023-04-02 02:10:01,693 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 134 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-02 02:10:01,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 435 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1399 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-02 02:10:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-04-02 02:10:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 485. [2023-04-02 02:10:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 250 states have (on average 1.152) internal successors, (288), 255 states have internal predecessors, (288), 200 states have call successors, (200), 35 states have call predecessors, (200), 34 states have return successors, (198), 194 states have call predecessors, (198), 198 states have call successors, (198) [2023-04-02 02:10:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 686 transitions. [2023-04-02 02:10:02,058 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 686 transitions. Word has length 171 [2023-04-02 02:10:02,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:10:02,058 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 686 transitions. [2023-04-02 02:10:02,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.96875) internal successors, (63), 29 states have internal predecessors, (63), 19 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (55), 19 states have call predecessors, (55), 17 states have call successors, (55) [2023-04-02 02:10:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 686 transitions. [2023-04-02 02:10:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-04-02 02:10:02,060 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:10:02,060 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:10:02,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-04-02 02:10:02,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-02 02:10:02,265 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:10:02,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:10:02,266 INFO L85 PathProgramCache]: Analyzing trace with hash 661049022, now seen corresponding path program 5 times [2023-04-02 02:10:02,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:10:02,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728909389] [2023-04-02 02:10:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:10:02,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:10:02,276 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:10:02,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420936881] [2023-04-02 02:10:02,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 02:10:02,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:02,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:10:02,277 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) [2023-04-02 02:10:02,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-04-02 02:10:07,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-02 02:10:07,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:10:07,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-02 02:10:07,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:10:08,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 139 proven. 186 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2023-04-02 02:10:08,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:10:09,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:10:09,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728909389] [2023-04-02 02:10:09,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:10:09,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420936881] [2023-04-02 02:10:09,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420936881] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 02:10:09,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 02:10:09,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-04-02 02:10:09,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154620506] [2023-04-02 02:10:09,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 02:10:09,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 02:10:09,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:10:09,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 02:10:09,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-02 02:10:09,185 INFO L87 Difference]: Start difference. First operand 485 states and 686 transitions. Second operand has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2023-04-02 02:10:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:10:12,438 INFO L93 Difference]: Finished difference Result 573 states and 813 transitions. [2023-04-02 02:10:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-02 02:10:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) Word has length 179 [2023-04-02 02:10:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:10:12,440 INFO L225 Difference]: With dead ends: 573 [2023-04-02 02:10:12,440 INFO L226 Difference]: Without dead ends: 571 [2023-04-02 02:10:12,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-04-02 02:10:12,441 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 37 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 1256 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 02:10:12,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 503 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1256 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 02:10:12,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2023-04-02 02:10:12,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 565. [2023-04-02 02:10:12,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 291 states have (on average 1.1580756013745706) internal successors, (337), 297 states have internal predecessors, (337), 235 states have call successors, (235), 39 states have call predecessors, (235), 38 states have return successors, (233), 228 states have call predecessors, (233), 233 states have call successors, (233) [2023-04-02 02:10:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 805 transitions. [2023-04-02 02:10:12,871 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 805 transitions. Word has length 179 [2023-04-02 02:10:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:10:12,871 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 805 transitions. [2023-04-02 02:10:12,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 9 states have call successors, (30) [2023-04-02 02:10:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 805 transitions. [2023-04-02 02:10:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 02:10:12,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:10:12,873 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:10:12,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-04-02 02:10:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:13,082 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:10:13,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:10:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 4 times [2023-04-02 02:10:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:10:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411607328] [2023-04-02 02:10:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:10:13,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:10:13,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:10:13,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549231248] [2023-04-02 02:10:13,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 02:10:13,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:10:13,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:10:13,096 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) [2023-04-02 02:10:13,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-04-02 02:10:13,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 02:10:13,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:10:13,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 73 conjunts are in the unsatisfiable core [2023-04-02 02:10:13,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:10:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 54 proven. 106 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-04-02 02:10:14,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:10:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-04-02 02:10:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:10:17,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411607328] [2023-04-02 02:10:17,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:10:17,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549231248] [2023-04-02 02:10:17,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549231248] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:10:17,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:10:17,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-04-02 02:10:17,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982617324] [2023-04-02 02:10:17,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:10:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-02 02:10:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:10:17,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-02 02:10:17,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-04-02 02:10:17,137 INFO L87 Difference]: Start difference. First operand 565 states and 805 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 18 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2023-04-02 02:11:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 02:11:44,005 INFO L93 Difference]: Finished difference Result 871 states and 1306 transitions. [2023-04-02 02:11:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-04-02 02:11:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 18 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) Word has length 182 [2023-04-02 02:11:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 02:11:44,010 INFO L225 Difference]: With dead ends: 871 [2023-04-02 02:11:44,010 INFO L226 Difference]: Without dead ends: 863 [2023-04-02 02:11:44,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 59.5s TimeCoverageRelationStatistics Valid=1433, Invalid=6399, Unknown=0, NotChecked=0, Total=7832 [2023-04-02 02:11:44,012 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 226 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2023-04-02 02:11:44,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 611 Invalid, 2474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 29.1s Time] [2023-04-02 02:11:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2023-04-02 02:11:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 789. [2023-04-02 02:11:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 387 states have (on average 1.186046511627907) internal successors, (459), 392 states have internal predecessors, (459), 359 states have call successors, (359), 43 states have call predecessors, (359), 42 states have return successors, (357), 353 states have call predecessors, (357), 357 states have call successors, (357) [2023-04-02 02:11:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1175 transitions. [2023-04-02 02:11:44,753 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 1175 transitions. Word has length 182 [2023-04-02 02:11:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 02:11:44,753 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 1175 transitions. [2023-04-02 02:11:44,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 18 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2023-04-02 02:11:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 1175 transitions. [2023-04-02 02:11:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-02 02:11:44,755 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 02:11:44,755 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 02:11:44,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-04-02 02:11:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:44,961 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 02:11:44,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 02:11:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash -804600145, now seen corresponding path program 5 times [2023-04-02 02:11:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 02:11:44,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710910628] [2023-04-02 02:11:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 02:11:44,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 02:11:44,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 02:11:44,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5585674] [2023-04-02 02:11:44,979 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 02:11:44,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 02:11:44,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 02:11:44,980 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) [2023-04-02 02:11:44,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-04-02 02:11:45,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-04-02 02:11:45,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 02:11:45,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 74 conjunts are in the unsatisfiable core [2023-04-02 02:11:45,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 02:11:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-04-02 02:11:46,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 02:12:02,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-04-02 02:12:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 02:12:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710910628] [2023-04-02 02:12:02,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 02:12:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5585674] [2023-04-02 02:12:02,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5585674] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 02:12:02,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 02:12:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2023-04-02 02:12:02,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511988893] [2023-04-02 02:12:02,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 02:12:02,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-02 02:12:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 02:12:02,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-02 02:12:02,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2023-04-02 02:12:02,023 INFO L87 Difference]: Start difference. First operand 789 states and 1175 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 18 states have call successors, (63), 3 states have call predecessors, (63), 2 states have return successors, (61), 16 states have call predecessors, (61), 16 states have call successors, (61)