/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/ps6-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:46:54,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:46:54,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:46:54,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:46:54,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:46:54,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:46:54,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:46:54,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:46:54,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:46:54,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:46:54,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:46:54,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:46:54,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:46:54,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:46:54,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:46:54,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:46:54,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:46:54,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:46:54,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:46:54,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:46:54,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:46:54,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:46:54,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:46:54,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:46:54,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:46:54,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:46:54,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:46:54,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:46:54,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:46:54,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:46:54,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:46:54,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:46:54,789 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:46:54,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:46:54,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:46:54,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:46:54,791 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 [2023-03-31 00:46:54,805 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:46:54,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:46:54,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:46:54,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:46:54,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:46:54,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:46:54,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:46:54,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:46:54,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:46:54,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:46:54,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:46:54,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:46:54,809 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:46:54,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:46:54,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:46:54,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:46:54,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:46:54,951 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:46:54,951 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:46:54,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2023-03-31 00:46:55,789 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:46:56,014 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:46:56,014 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2023-03-31 00:46:56,018 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b758c487f/0e05ed5abf00412eb8cdd132e01078a8/FLAG8ea708bb8 [2023-03-31 00:46:56,026 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b758c487f/0e05ed5abf00412eb8cdd132e01078a8 [2023-03-31 00:46:56,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:46:56,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:46:56,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:46:56,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:46:56,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:46:56,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f4e475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56, skipping insertion in model container [2023-03-31 00:46:56,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:46:56,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:46:56,145 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/ps6-ll_unwindbound50.c[458,471] [2023-03-31 00:46:56,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:46:56,168 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:46:56,179 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/ps6-ll_unwindbound50.c[458,471] [2023-03-31 00:46:56,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:46:56,196 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:46:56,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56 WrapperNode [2023-03-31 00:46:56,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:46:56,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:46:56,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:46:56,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:46:56,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:46:56,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:46:56,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:46:56,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:46:56,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (1/1) ... [2023-03-31 00:46:56,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:46:56,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:56,258 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) [2023-03-31 00:46:56,278 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 [2023-03-31 00:46:56,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:46:56,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:46:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:46:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:46:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:46:56,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:46:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:46:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:46:56,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:46:56,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:46:56,353 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:46:56,355 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:46:56,456 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:46:56,460 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:46:56,460 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 00:46:56,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:46:56 BoogieIcfgContainer [2023-03-31 00:46:56,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:46:56,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:46:56,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:46:56,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:46:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:46:56" (1/3) ... [2023-03-31 00:46:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17488d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:46:56, skipping insertion in model container [2023-03-31 00:46:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:46:56" (2/3) ... [2023-03-31 00:46:56,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17488d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:46:56, skipping insertion in model container [2023-03-31 00:46:56,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:46:56" (3/3) ... [2023-03-31 00:46:56,466 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2023-03-31 00:46:56,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:46:56,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:46:56,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:46:56,542 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;@46763853, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:46:56,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:46:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:46:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 00:46:56,554 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:56,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:56,555 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:56,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2023-03-31 00:46:56,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:56,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909799388] [2023-03-31 00:46:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:56,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:56,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:46:56,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909799388] [2023-03-31 00:46:56,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:46:56,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689288936] [2023-03-31 00:46:56,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:56,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:56,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:56,665 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) [2023-03-31 00:46:56,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:46:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:56,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:46:56,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:56,738 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:46:56,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689288936] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:46:56,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:46:56,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:46:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626300282] [2023-03-31 00:46:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:46:56,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:46:56,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:46:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:46:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:46:56,762 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:46:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:46:56,774 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-03-31 00:46:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:46:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-03-31 00:46:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:46:56,779 INFO L225 Difference]: With dead ends: 49 [2023-03-31 00:46:56,779 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 00:46:56,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:46:56,783 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-03-31 00:46:56,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:46:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 00:46:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 00:46:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:46:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-03-31 00:46:56,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-03-31 00:46:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:46:56,806 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-03-31 00:46:56,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:46:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-03-31 00:46:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:46:56,807 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:56,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:56,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:46:57,011 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 [2023-03-31 00:46:57,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:57,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2023-03-31 00:46:57,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:57,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730096659] [2023-03-31 00:46:57,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:57,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:46:57,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298357904] [2023-03-31 00:46:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:57,042 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) [2023-03-31 00:46:57,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:46:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:57,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:46:57,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:57,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:46:57,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:46:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730096659] [2023-03-31 00:46:57,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:46:57,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298357904] [2023-03-31 00:46:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298357904] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:46:57,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:46:57,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:46:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606394116] [2023-03-31 00:46:57,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:46:57,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:46:57,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:46:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:46:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:46:57,167 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:46:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:46:57,182 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-03-31 00:46:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:46:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-03-31 00:46:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:46:57,183 INFO L225 Difference]: With dead ends: 34 [2023-03-31 00:46:57,184 INFO L226 Difference]: Without dead ends: 26 [2023-03-31 00:46:57,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:46:57,185 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:46:57,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:46:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-03-31 00:46:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-03-31 00:46:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 00:46:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-03-31 00:46:57,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2023-03-31 00:46:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:46:57,190 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-03-31 00:46:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:46:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-03-31 00:46:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:46:57,191 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:57,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:57,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 00:46:57,395 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 [2023-03-31 00:46:57,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:57,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2023-03-31 00:46:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:57,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230944500] [2023-03-31 00:46:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:57,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:46:57,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448707133] [2023-03-31 00:46:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:57,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:57,408 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) [2023-03-31 00:46:57,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:46:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:57,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2023-03-31 00:46:57,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:57,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:46:57,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:46:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230944500] [2023-03-31 00:46:57,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:46:57,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448707133] [2023-03-31 00:46:57,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448707133] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:46:57,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:46:57,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 00:46:57,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905086565] [2023-03-31 00:46:57,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:46:57,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 00:46:57,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:46:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 00:46:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-03-31 00:46:57,535 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:46:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:46:57,702 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2023-03-31 00:46:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 00:46:57,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-03-31 00:46:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:46:57,704 INFO L225 Difference]: With dead ends: 36 [2023-03-31 00:46:57,705 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 00:46:57,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-03-31 00:46:57,706 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:46:57,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:46:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 00:46:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 00:46:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:46:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-03-31 00:46:57,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2023-03-31 00:46:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:46:57,732 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-03-31 00:46:57,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:46:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-03-31 00:46:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:46:57,735 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:57,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:57,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 00:46:57,939 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 [2023-03-31 00:46:57,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:57,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2023-03-31 00:46:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:57,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249996653] [2023-03-31 00:46:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:57,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:46:57,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346690926] [2023-03-31 00:46:57,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:57,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:57,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:57,957 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) [2023-03-31 00:46:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:46:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:57,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:46:57,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:58,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:46:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:58,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:46:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249996653] [2023-03-31 00:46:58,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:46:58,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346690926] [2023-03-31 00:46:58,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346690926] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:46:58,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:46:58,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 00:46:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991098053] [2023-03-31 00:46:58,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:46:58,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:46:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:46:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:46:58,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:46:58,110 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 00:46:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:46:58,220 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2023-03-31 00:46:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:46:58,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2023-03-31 00:46:58,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:46:58,222 INFO L225 Difference]: With dead ends: 66 [2023-03-31 00:46:58,222 INFO L226 Difference]: Without dead ends: 58 [2023-03-31 00:46:58,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:46:58,223 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:46:58,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 85 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:46:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-03-31 00:46:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-03-31 00:46:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 00:46:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2023-03-31 00:46:58,230 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2023-03-31 00:46:58,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:46:58,230 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2023-03-31 00:46:58,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 00:46:58,230 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2023-03-31 00:46:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 00:46:58,230 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:58,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:58,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 00:46:58,434 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 [2023-03-31 00:46:58,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:58,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:58,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2023-03-31 00:46:58,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:58,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693559233] [2023-03-31 00:46:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:58,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:58,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:46:58,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448615404] [2023-03-31 00:46:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:58,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:58,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:58,470 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) [2023-03-31 00:46:58,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:46:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:58,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 00:46:58,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:46:58,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:46:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 00:46:58,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:46:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693559233] [2023-03-31 00:46:58,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:46:58,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448615404] [2023-03-31 00:46:58,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448615404] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 00:46:58,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:46:58,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-03-31 00:46:58,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636701088] [2023-03-31 00:46:58,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:46:58,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:46:58,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:46:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:46:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:46:58,698 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:46:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:46:58,740 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-03-31 00:46:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:46:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-03-31 00:46:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:46:58,743 INFO L225 Difference]: With dead ends: 68 [2023-03-31 00:46:58,743 INFO L226 Difference]: Without dead ends: 60 [2023-03-31 00:46:58,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:46:58,744 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:46:58,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:46:58,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-03-31 00:46:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-03-31 00:46:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 00:46:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-03-31 00:46:58,756 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 26 [2023-03-31 00:46:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:46:58,756 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-03-31 00:46:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:46:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-03-31 00:46:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 00:46:58,757 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:46:58,757 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:46:58,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:46:58,961 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 [2023-03-31 00:46:58,961 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:46:58,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:46:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2023-03-31 00:46:58,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:46:58,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054531804] [2023-03-31 00:46:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:58,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:46:58,970 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:46:58,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674492122] [2023-03-31 00:46:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:46:58,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:46:58,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:46:58,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:46:58,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:46:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:46:59,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2023-03-31 00:46:59,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:46:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:46:59,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:47:03,195 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (= (* c_main_~y~0 c_main_~k~0) .cse0) (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)))) is different from false [2023-03-31 00:47:19,369 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_9 Int) (v_main_~k~0_BEFORE_CALL_5 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 6) (* 7 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9) .cse0 (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 10)) 12) 0) (= (* v_main_~y~0_BEFORE_CALL_9 v_main_~k~0_BEFORE_CALL_5) .cse0))))) is different from true [2023-03-31 00:47:37,421 WARN L861 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((v_main_~y~0_BEFORE_CALL_9 Int) (v_main_~k~0_BEFORE_CALL_5 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9))) (or (= (mod (+ (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 6) (* 7 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9) .cse0 (* v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 v_main_~y~0_BEFORE_CALL_9 10)) 12) 0) (= (* v_main_~y~0_BEFORE_CALL_9 v_main_~k~0_BEFORE_CALL_5) .cse0)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-03-31 00:47:55,365 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (or (not (= (mod (+ (* 10 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 7 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) .cse0) 12) 0)) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (<= main_~k~0 c_main_~c~0) (= (+ (* main_~k~0 c_main_~y~0) main_~k~0) (+ (* 2 c_main_~y~0) .cse0 1)))))) is different from false [2023-03-31 00:47:57,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:47:57,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054531804] [2023-03-31 00:47:57,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:47:57,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674492122] [2023-03-31 00:47:57,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674492122] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:47:57,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:47:57,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-03-31 00:47:57,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631374193] [2023-03-31 00:47:57,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:47:57,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 00:47:57,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:47:57,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 00:47:57,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=106, Unknown=5, NotChecked=92, Total=240 [2023-03-31 00:47:57,416 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 00:47:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:47:57,504 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-03-31 00:47:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:47:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2023-03-31 00:47:57,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:47:57,506 INFO L225 Difference]: With dead ends: 59 [2023-03-31 00:47:57,506 INFO L226 Difference]: Without dead ends: 53 [2023-03-31 00:47:57,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=56, Invalid=165, Unknown=5, NotChecked=116, Total=342 [2023-03-31 00:47:57,507 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:47:57,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 145 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:47:57,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-03-31 00:47:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-03-31 00:47:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:47:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-03-31 00:47:57,514 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 37 [2023-03-31 00:47:57,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:47:57,515 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-03-31 00:47:57,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 00:47:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-03-31 00:47:57,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-03-31 00:47:57,515 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:47:57,515 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:47:57,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:47:57,716 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 [2023-03-31 00:47:57,716 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:47:57,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:47:57,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1537538120, now seen corresponding path program 2 times [2023-03-31 00:47:57,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:47:57,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671379096] [2023-03-31 00:47:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:47:57,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:47:57,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:47:57,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323952821] [2023-03-31 00:47:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:47:57,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:47:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:47:57,731 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) [2023-03-31 00:47:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:47:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:47:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:47:57,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 00:47:57,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:47:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:47:57,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:47:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:47:58,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:47:58,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671379096] [2023-03-31 00:47:58,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:47:58,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323952821] [2023-03-31 00:47:58,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323952821] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:47:58,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:47:58,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-03-31 00:47:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336920778] [2023-03-31 00:47:58,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:47:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:47:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:47:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:47:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:47:58,138 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 17 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 00:47:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:47:58,536 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-03-31 00:47:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:47:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) Word has length 45 [2023-03-31 00:47:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:47:58,537 INFO L225 Difference]: With dead ends: 70 [2023-03-31 00:47:58,537 INFO L226 Difference]: Without dead ends: 62 [2023-03-31 00:47:58,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-03-31 00:47:58,538 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 25 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:47:58,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 241 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:47:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-03-31 00:47:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-03-31 00:47:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 00:47:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-03-31 00:47:58,548 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 45 [2023-03-31 00:47:58,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:47:58,548 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-03-31 00:47:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-03-31 00:47:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-03-31 00:47:58,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 00:47:58,549 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:47:58,549 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:47:58,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:47:58,756 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 [2023-03-31 00:47:58,756 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:47:58,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:47:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1953308764, now seen corresponding path program 1 times [2023-03-31 00:47:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:47:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328337019] [2023-03-31 00:47:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:47:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:47:58,767 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:47:58,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112676248] [2023-03-31 00:47:58,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:47:58,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:47:58,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:47:58,776 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) [2023-03-31 00:47:58,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:47:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:47:58,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 00:47:58,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:47:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:47:58,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:47:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 00:47:59,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:47:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328337019] [2023-03-31 00:47:59,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:47:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112676248] [2023-03-31 00:47:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112676248] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:47:59,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:47:59,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 00:47:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558753465] [2023-03-31 00:47:59,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:47:59,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 00:47:59,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:47:59,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 00:47:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:47:59,011 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2023-03-31 00:47:59,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:47:59,168 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2023-03-31 00:47:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:47:59,169 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) Word has length 55 [2023-03-31 00:47:59,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:47:59,172 INFO L225 Difference]: With dead ends: 134 [2023-03-31 00:47:59,172 INFO L226 Difference]: Without dead ends: 124 [2023-03-31 00:47:59,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:47:59,173 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:47:59,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 115 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:47:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-03-31 00:47:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2023-03-31 00:47:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 76 states have internal predecessors, (78), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 13 states have call predecessors, (17), 17 states have call successors, (17) [2023-03-31 00:47:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2023-03-31 00:47:59,211 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 55 [2023-03-31 00:47:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:47:59,211 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2023-03-31 00:47:59,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 12 states have call successors, (16), 8 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2023-03-31 00:47:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2023-03-31 00:47:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-31 00:47:59,213 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:47:59,213 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:47:59,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-03-31 00:47:59,417 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 [2023-03-31 00:47:59,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:47:59,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:47:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash -423798549, now seen corresponding path program 3 times [2023-03-31 00:47:59,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:47:59,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814607305] [2023-03-31 00:47:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:47:59,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:47:59,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:47:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047969134] [2023-03-31 00:47:59,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:47:59,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:47:59,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:47:59,429 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) [2023-03-31 00:47:59,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:47:59,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-31 00:47:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:47:59,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 36 conjunts are in the unsatisfiable core [2023-03-31 00:47:59,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:47:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-31 00:47:59,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:48:00,211 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-03-31 00:48:00,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:48:00,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814607305] [2023-03-31 00:48:00,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:48:00,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047969134] [2023-03-31 00:48:00,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047969134] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:48:00,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:48:00,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2023-03-31 00:48:00,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880346544] [2023-03-31 00:48:00,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:48:00,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-03-31 00:48:00,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:48:00,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-03-31 00:48:00,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:48:00,214 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 23 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 15 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2023-03-31 00:48:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:48:00,938 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2023-03-31 00:48:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 00:48:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 15 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) Word has length 69 [2023-03-31 00:48:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:48:00,939 INFO L225 Difference]: With dead ends: 121 [2023-03-31 00:48:00,939 INFO L226 Difference]: Without dead ends: 110 [2023-03-31 00:48:00,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2023-03-31 00:48:00,940 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 49 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 00:48:00,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 374 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 00:48:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-03-31 00:48:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2023-03-31 00:48:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 17 states have call successors, (17), 14 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 00:48:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2023-03-31 00:48:00,956 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 69 [2023-03-31 00:48:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:48:00,957 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2023-03-31 00:48:00,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 15 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 16 states have call predecessors, (17), 15 states have call successors, (17) [2023-03-31 00:48:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2023-03-31 00:48:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-03-31 00:48:00,958 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:48:00,958 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:48:00,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:48:01,163 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 [2023-03-31 00:48:01,164 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:48:01,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:48:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 844335210, now seen corresponding path program 2 times [2023-03-31 00:48:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:48:01,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13392346] [2023-03-31 00:48:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:48:01,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:48:01,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:48:01,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030931998] [2023-03-31 00:48:01,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:48:01,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:48:01,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:48:01,181 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) [2023-03-31 00:48:01,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:48:01,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:48:01,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:48:01,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 00:48:01,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:48:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 00:48:01,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:48:01,804 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-03-31 00:48:01,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:48:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13392346] [2023-03-31 00:48:01,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:48:01,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030931998] [2023-03-31 00:48:01,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030931998] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:48:01,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:48:01,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-03-31 00:48:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688550106] [2023-03-31 00:48:01,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:48:01,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 00:48:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:48:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 00:48:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-03-31 00:48:01,806 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2023-03-31 00:48:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:48:02,369 INFO L93 Difference]: Finished difference Result 266 states and 289 transitions. [2023-03-31 00:48:02,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-03-31 00:48:02,370 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) Word has length 103 [2023-03-31 00:48:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:48:02,374 INFO L225 Difference]: With dead ends: 266 [2023-03-31 00:48:02,374 INFO L226 Difference]: Without dead ends: 256 [2023-03-31 00:48:02,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-03-31 00:48:02,376 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 221 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:48:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 214 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:48:02,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-03-31 00:48:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 206. [2023-03-31 00:48:02,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.0833333333333333) internal successors, (156), 154 states have internal predecessors, (156), 37 states have call successors, (37), 26 states have call predecessors, (37), 24 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2023-03-31 00:48:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2023-03-31 00:48:02,416 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 103 [2023-03-31 00:48:02,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:48:02,416 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2023-03-31 00:48:02,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.461538461538462) internal successors, (116), 26 states have internal predecessors, (116), 24 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (26), 23 states have call predecessors, (26), 24 states have call successors, (26) [2023-03-31 00:48:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2023-03-31 00:48:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-03-31 00:48:02,424 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:48:02,424 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:48:02,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-31 00:48:02,629 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 [2023-03-31 00:48:02,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:48:02,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:48:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash 988557105, now seen corresponding path program 4 times [2023-03-31 00:48:02,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:48:02,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331864965] [2023-03-31 00:48:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:48:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:48:02,653 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:48:02,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152970654] [2023-03-31 00:48:02,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 00:48:02,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:48:02,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:48:02,655 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) [2023-03-31 00:48:02,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:48:02,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 00:48:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:48:02,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 55 conjunts are in the unsatisfiable core [2023-03-31 00:48:02,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:48:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-03-31 00:48:02,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:48:03,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:48:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331864965] [2023-03-31 00:48:03,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:48:03,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152970654] [2023-03-31 00:48:03,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152970654] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 00:48:03,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-03-31 00:48:03,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-03-31 00:48:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722782187] [2023-03-31 00:48:03,119 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-03-31 00:48:03,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:48:03,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:48:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:48:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-03-31 00:48:03,120 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-03-31 00:48:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:48:03,458 INFO L93 Difference]: Finished difference Result 211 states and 232 transitions. [2023-03-31 00:48:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-03-31 00:48:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 117 [2023-03-31 00:48:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:48:03,460 INFO L225 Difference]: With dead ends: 211 [2023-03-31 00:48:03,460 INFO L226 Difference]: Without dead ends: 205 [2023-03-31 00:48:03,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-03-31 00:48:03,461 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 2 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 00:48:03,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 671 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 00:48:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-03-31 00:48:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-03-31 00:48:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 144 states have (on average 1.0763888888888888) internal successors, (155), 153 states have internal predecessors, (155), 36 states have call successors, (36), 26 states have call predecessors, (36), 24 states have return successors, (34), 25 states have call predecessors, (34), 34 states have call successors, (34) [2023-03-31 00:48:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 225 transitions. [2023-03-31 00:48:03,553 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 225 transitions. Word has length 117 [2023-03-31 00:48:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:48:03,554 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 225 transitions. [2023-03-31 00:48:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 14 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2023-03-31 00:48:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 225 transitions. [2023-03-31 00:48:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-03-31 00:48:03,556 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:48:03,556 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:48:03,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-03-31 00:48:03,761 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 [2023-03-31 00:48:03,761 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:48:03,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:48:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 636252690, now seen corresponding path program 5 times [2023-03-31 00:48:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:48:03,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188041590] [2023-03-31 00:48:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:48:03,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:48:03,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:48:03,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634039603] [2023-03-31 00:48:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-31 00:48:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:48:03,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:48:03,788 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) [2023-03-31 00:48:03,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process