/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/array-crafted/xor3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:14:28,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:14:28,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:14:28,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 19:14:28,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 19:14:28,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 19:14:28,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 19:14:28,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 19:14:28,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 19:14:28,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 19:14:28,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 19:14:28,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 19:14:28,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:14:28,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:14:28,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:14:28,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:14:28,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:14:28,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:14:28,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:14:28,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:14:28,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:14:28,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:14:28,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:14:28,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:14:28,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:14:28,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 19:14:28,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 19:14:28,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 19:14:28,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 19:14:28,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 19:14:28,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 19:14:28,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 19:14:28,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 19:14:28,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:14:28,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:14:28,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:14:28,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:14:28,666 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:14:28,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:14:28,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:14:28,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:14:28,667 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:14:28,667 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:14:28,667 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:14:28,667 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:14:28,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:14:28,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:14:28,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:14:28,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:28,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:14:28,670 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:14:28,671 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:14:28,671 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:14:28,671 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:14:28,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:14:28,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:14:28,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:14:28,870 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:14:28,872 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:14:28,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor3.i [2023-04-01 19:14:29,943 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:14:30,083 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:14:30,083 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor3.i [2023-04-01 19:14:30,088 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72d7cac4/6d558c21d35940dd97e9bd8666446935/FLAG69041e881 [2023-04-01 19:14:30,099 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b72d7cac4/6d558c21d35940dd97e9bd8666446935 [2023-04-01 19:14:30,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:14:30,102 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:14:30,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:30,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:14:30,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:14:30,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,106 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd1ef8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30, skipping insertion in model container [2023-04-01 19:14:30,106 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:14:30,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:14:30,230 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/array-crafted/xor3.i[1297,1310] [2023-04-01 19:14:30,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:30,250 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:14:30,263 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/array-crafted/xor3.i[1297,1310] [2023-04-01 19:14:30,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:30,274 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:14:30,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30 WrapperNode [2023-04-01 19:14:30,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:30,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:14:30,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:14:30,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:14:30,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,297 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:14:30,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:14:30,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:14:30,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:14:30,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (1/1) ... [2023-04-01 19:14:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:30,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:14:30,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:14:30,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:14:30,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:14:30,356 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:14:30,356 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-04-01 19:14:30,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:14:30,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:14:30,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:14:30,426 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:14:30,428 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:14:30,596 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:14:30,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:14:30,601 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:14:30,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:30 BoogieIcfgContainer [2023-04-01 19:14:30,602 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:14:30,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:14:30,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:14:30,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:14:30,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:14:30" (1/3) ... [2023-04-01 19:14:30,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62390dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:30, skipping insertion in model container [2023-04-01 19:14:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:30" (2/3) ... [2023-04-01 19:14:30,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62390dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:30, skipping insertion in model container [2023-04-01 19:14:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:30" (3/3) ... [2023-04-01 19:14:30,608 INFO L112 eAbstractionObserver]: Analyzing ICFG xor3.i [2023-04-01 19:14:30,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:14:30,620 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:14:30,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:14:30,658 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;@53e1a248, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:14:30,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:14:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:14:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:30,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:30,669 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:30,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:30,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:30,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1594462314, now seen corresponding path program 1 times [2023-04-01 19:14:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:30,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279302995] [2023-04-01 19:14:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:30,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:30,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:30,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:30,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279302995] [2023-04-01 19:14:30,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279302995] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:30,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:14:30,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:14:30,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957386538] [2023-04-01 19:14:30,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:14:30,893 INFO L87 Difference]: Start difference. First operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:31,005 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 19:14:31,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:31,013 INFO L225 Difference]: With dead ends: 62 [2023-04-01 19:14:31,013 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:14:31,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:14:31,019 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:31,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:14:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 19:14:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-04-01 19:14:31,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 32 [2023-04-01 19:14:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:31,058 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-04-01 19:14:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-04-01 19:14:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:31,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:31,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:31,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:14:31,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:31,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:31,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1766016415, now seen corresponding path program 1 times [2023-04-01 19:14:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158392326] [2023-04-01 19:14:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:31,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158392326] [2023-04-01 19:14:31,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158392326] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:31,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030809143] [2023-04-01 19:14:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:31,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:31,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:31,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:31,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:14:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:31,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:31,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030809143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:31,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680605852] [2023-04-01 19:14:31,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:31,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:31,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:31,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:31,367 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:31,382 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 19:14:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:31,384 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:14:31,384 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 19:14:31,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:31,386 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:31,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:31,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 19:14:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 19:14:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 19:14:31,396 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 32 [2023-04-01 19:14:31,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:31,396 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 19:14:31,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 19:14:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:14:31,397 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:31,397 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:31,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 19:14:31,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:31,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:31,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1146944703, now seen corresponding path program 1 times [2023-04-01 19:14:31,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151823831] [2023-04-01 19:14:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:31,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:14:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:14:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:31,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:31,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151823831] [2023-04-01 19:14:31,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151823831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233860502] [2023-04-01 19:14:31,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:31,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:31,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:31,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:31,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:14:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:31,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:31,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:14:31,803 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:31,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233860502] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:31,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:31,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 19:14:31,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665448345] [2023-04-01 19:14:31,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:31,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:31,804 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:31,813 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2023-04-01 19:14:31,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:31,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-01 19:14:31,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:31,814 INFO L225 Difference]: With dead ends: 58 [2023-04-01 19:14:31,814 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:14:31,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:31,815 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:31,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:31,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:14:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-04-01 19:14:31,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-04-01 19:14:31,820 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 34 [2023-04-01 19:14:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:31,820 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-04-01 19:14:31,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-04-01 19:14:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:14:31,821 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:31,821 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:31,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:32,028 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,SelfDestructingSolverStorable2 [2023-04-01 19:14:32,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:32,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1675002724, now seen corresponding path program 1 times [2023-04-01 19:14:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:32,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651662267] [2023-04-01 19:14:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:32,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:14:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:14:32,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:32,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651662267] [2023-04-01 19:14:32,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651662267] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:32,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232902728] [2023-04-01 19:14:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:32,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:32,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:14:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:32,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:32,234 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:32,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232902728] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:32,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:32,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119187771] [2023-04-01 19:14:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:32,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:32,235 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:32,243 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-04-01 19:14:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2023-04-01 19:14:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:32,244 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:14:32,244 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 19:14:32,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:32,245 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:32,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 19:14:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-04-01 19:14:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-04-01 19:14:32,253 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 46 [2023-04-01 19:14:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:32,254 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-04-01 19:14:32,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-04-01 19:14:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:14:32,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:32,259 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:32,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:32,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:32,465 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:32,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash -711488038, now seen corresponding path program 1 times [2023-04-01 19:14:32,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:32,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364590403] [2023-04-01 19:14:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:32,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:14:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:32,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364590403] [2023-04-01 19:14:32,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364590403] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:32,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657003850] [2023-04-01 19:14:32,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:32,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:32,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:32,561 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:32,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:14:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:32,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:14:32,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:32,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:32,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657003850] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:32,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:32,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:14:32,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369088330] [2023-04-01 19:14:32,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:14:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:32,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:14:32,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:14:32,697 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:32,795 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-04-01 19:14:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:14:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 19:14:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:32,796 INFO L225 Difference]: With dead ends: 63 [2023-04-01 19:14:32,796 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 19:14:32,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:14:32,797 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:32,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 19:14:32,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 19:14:32,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:32,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 19:14:32,801 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 48 [2023-04-01 19:14:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:32,801 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 19:14:32,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:32,801 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 19:14:32,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:14:32,802 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:32,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:32,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:33,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:33,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:33,007 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1508030784, now seen corresponding path program 2 times [2023-04-01 19:14:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:33,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656406765] [2023-04-01 19:14:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:14:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-01 19:14:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 19:14:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 19:14:33,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656406765] [2023-04-01 19:14:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656406765] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697122905] [2023-04-01 19:14:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:14:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:33,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:33,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:33,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:14:33,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:14:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:33,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:14:33,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:33,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:33,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697122905] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:33,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:33,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 19:14:33,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753433574] [2023-04-01 19:14:33,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:33,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 19:14:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:33,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 19:14:33,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:14:33,340 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:33,587 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2023-04-01 19:14:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:14:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2023-04-01 19:14:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:33,588 INFO L225 Difference]: With dead ends: 86 [2023-04-01 19:14:33,588 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 19:14:33,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:14:33,589 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:33,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 37 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 19:14:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-04-01 19:14:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-04-01 19:14:33,594 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2023-04-01 19:14:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:33,595 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-04-01 19:14:33,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-04-01 19:14:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 19:14:33,595 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:33,595 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:33,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:33,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:33,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1278523033, now seen corresponding path program 3 times [2023-04-01 19:14:33,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:33,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541594210] [2023-04-01 19:14:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:33,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:14:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:14:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-04-01 19:14:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541594210] [2023-04-01 19:14:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541594210] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123404986] [2023-04-01 19:14:33,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:14:33,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:33,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:33,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:14:33,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:14:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:33,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:14:33,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:33,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123404986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:34,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:34,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 19:14:34,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39951009] [2023-04-01 19:14:34,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:34,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 19:14:34,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:34,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 19:14:34,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:14:34,007 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:34,193 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2023-04-01 19:14:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:14:34,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 78 [2023-04-01 19:14:34,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:34,194 INFO L225 Difference]: With dead ends: 113 [2023-04-01 19:14:34,195 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 19:14:34,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:14:34,196 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:34,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 19:14:34,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-04-01 19:14:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-04-01 19:14:34,202 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 78 [2023-04-01 19:14:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:34,202 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-04-01 19:14:34,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-04-01 19:14:34,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 19:14:34,203 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:34,203 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:34,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 19:14:34,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:34,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:34,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:34,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1076481519, now seen corresponding path program 4 times [2023-04-01 19:14:34,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:34,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073812173] [2023-04-01 19:14:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:34,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:34,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-04-01 19:14:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:34,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 19:14:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:34,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073812173] [2023-04-01 19:14:34,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073812173] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:34,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343998252] [2023-04-01 19:14:34,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:14:34,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:34,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:34,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:34,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:14:34,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:14:34,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:34,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:14:34,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:34,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:34,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343998252] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:34,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:34,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 19:14:34,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538697037] [2023-04-01 19:14:34,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:14:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:14:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:14:34,970 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:35,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:35,317 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2023-04-01 19:14:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:14:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2023-04-01 19:14:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:35,320 INFO L225 Difference]: With dead ends: 163 [2023-04-01 19:14:35,320 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 19:14:35,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:14:35,323 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:35,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 19:14:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 19:14:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:35,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-04-01 19:14:35,342 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 128 [2023-04-01 19:14:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:35,342 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-04-01 19:14:35,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:35,342 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-04-01 19:14:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 19:14:35,346 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:35,346 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:35,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:35,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:35,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash -614230871, now seen corresponding path program 5 times [2023-04-01 19:14:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:35,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395935121] [2023-04-01 19:14:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:35,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:36,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:36,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:14:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 19:14:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:36,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-04-01 19:14:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:36,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395935121] [2023-04-01 19:14:36,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395935121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112870900] [2023-04-01 19:14:36,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:14:36,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:36,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:36,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:36,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:14:37,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-04-01 19:14:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:37,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:14:37,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2023-04-01 19:14:37,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-04-01 19:14:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112870900] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:37,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-04-01 19:14:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452403849] [2023-04-01 19:14:37,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:37,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:14:37,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:14:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:14:37,578 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:38,413 INFO L93 Difference]: Finished difference Result 214 states and 293 transitions. [2023-04-01 19:14:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 19:14:38,413 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 152 [2023-04-01 19:14:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:38,414 INFO L225 Difference]: With dead ends: 214 [2023-04-01 19:14:38,414 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 19:14:38,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 19:14:38,416 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 335 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:38,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 52 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:14:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 19:14:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2023-04-01 19:14:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 149 states have internal predecessors, (194), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2023-04-01 19:14:38,423 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 152 [2023-04-01 19:14:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:38,423 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2023-04-01 19:14:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2023-04-01 19:14:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 19:14:38,425 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:38,425 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:38,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:38,635 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,SelfDestructingSolverStorable8 [2023-04-01 19:14:38,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:38,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:38,636 INFO L85 PathProgramCache]: Analyzing trace with hash -929769181, now seen corresponding path program 6 times [2023-04-01 19:14:38,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:38,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697845718] [2023-04-01 19:14:38,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:38,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:14:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-04-01 19:14:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 19:14:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-04-01 19:14:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697845718] [2023-04-01 19:14:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697845718] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189034843] [2023-04-01 19:14:39,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:14:39,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:39,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:39,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:39,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:14:39,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 19:14:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:39,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:14:39,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2023-04-01 19:14:39,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2023-04-01 19:14:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189034843] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:39,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:39,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-04-01 19:14:39,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114240542] [2023-04-01 19:14:39,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:39,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:14:39,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:14:39,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:14:39,523 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:40,079 INFO L93 Difference]: Finished difference Result 272 states and 368 transitions. [2023-04-01 19:14:40,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 19:14:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 250 [2023-04-01 19:14:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:40,081 INFO L225 Difference]: With dead ends: 272 [2023-04-01 19:14:40,081 INFO L226 Difference]: Without dead ends: 168 [2023-04-01 19:14:40,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1056, Invalid=2850, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 19:14:40,083 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:40,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 37 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-01 19:14:40,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2023-04-01 19:14:40,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2023-04-01 19:14:40,091 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 250 [2023-04-01 19:14:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:40,092 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2023-04-01 19:14:40,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2023-04-01 19:14:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 19:14:40,093 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:40,094 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:40,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 19:14:40,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:14:40,301 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:40,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 440820285, now seen corresponding path program 7 times [2023-04-01 19:14:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:40,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209221047] [2023-04-01 19:14:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:40,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:40,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:40,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:14:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:41,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 19:14:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:41,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-04-01 19:14:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:41,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:41,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209221047] [2023-04-01 19:14:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209221047] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622311448] [2023-04-01 19:14:41,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:14:41,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:41,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:41,031 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:41,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:14:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:41,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:14:41,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:41,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:41,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622311448] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:41,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:41,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2023-04-01 19:14:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661306801] [2023-04-01 19:14:41,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:41,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-01 19:14:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-01 19:14:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 19:14:41,957 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:43,009 INFO L93 Difference]: Finished difference Result 331 states and 448 transitions. [2023-04-01 19:14:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 19:14:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 260 [2023-04-01 19:14:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:43,011 INFO L225 Difference]: With dead ends: 331 [2023-04-01 19:14:43,011 INFO L226 Difference]: Without dead ends: 219 [2023-04-01 19:14:43,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:14:43,014 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:43,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 27 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-01 19:14:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-04-01 19:14:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 211 states have internal predecessors, (256), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2023-04-01 19:14:43,023 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 260 [2023-04-01 19:14:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:43,024 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2023-04-01 19:14:43,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2023-04-01 19:14:43,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-04-01 19:14:43,027 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:43,027 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:43,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:43,232 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,SelfDestructingSolverStorable10 [2023-04-01 19:14:43,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:43,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash -199960527, now seen corresponding path program 8 times [2023-04-01 19:14:43,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:43,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674747248] [2023-04-01 19:14:43,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:44,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:44,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:14:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:44,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-04-01 19:14:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 19:14:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:44,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674747248] [2023-04-01 19:14:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674747248] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838838343] [2023-04-01 19:14:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:14:44,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:44,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:44,851 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:44,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:14:45,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:14:45,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:45,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 19:14:45,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:45,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838838343] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:47,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:47,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2023-04-01 19:14:47,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309169331] [2023-04-01 19:14:47,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:47,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-04-01 19:14:47,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-04-01 19:14:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 19:14:47,599 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:51,169 INFO L93 Difference]: Finished difference Result 435 states and 578 transitions. [2023-04-01 19:14:51,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-01 19:14:51,169 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 312 [2023-04-01 19:14:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:51,171 INFO L225 Difference]: With dead ends: 435 [2023-04-01 19:14:51,171 INFO L226 Difference]: Without dead ends: 323 [2023-04-01 19:14:51,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2023-04-01 19:14:51,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 234 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:51,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 42 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:14:51,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-04-01 19:14:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-04-01 19:14:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 315 states have internal predecessors, (360), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2023-04-01 19:14:51,186 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 312 [2023-04-01 19:14:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:51,186 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2023-04-01 19:14:51,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:51,187 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2023-04-01 19:14:51,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-04-01 19:14:51,190 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:51,190 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:51,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:51,397 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,SelfDestructingSolverStorable11 [2023-04-01 19:14:51,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:51,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash -259469799, now seen corresponding path program 9 times [2023-04-01 19:14:51,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:51,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390399433] [2023-04-01 19:14:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2023-04-01 19:14:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 19:14:57,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 351 [2023-04-01 19:14:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:14:57,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390399433] [2023-04-01 19:14:57,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390399433] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:57,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235027025] [2023-04-01 19:14:57,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:14:57,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:57,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:57,071 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:57,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:14:57,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:14:57,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:57,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:14:57,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1634 proven. 36 refuted. 0 times theorem prover too weak. 12355 trivial. 0 not checked. [2023-04-01 19:14:57,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2023-04-01 19:14:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235027025] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:58,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:58,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 9, 9] total 120 [2023-04-01 19:14:58,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755336945] [2023-04-01 19:14:58,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2023-04-01 19:14:58,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2023-04-01 19:14:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5581, Invalid=8699, Unknown=0, NotChecked=0, Total=14280 [2023-04-01 19:14:58,022 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:02,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:02,814 INFO L93 Difference]: Finished difference Result 454 states and 554 transitions. [2023-04-01 19:15:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-04-01 19:15:02,815 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 416 [2023-04-01 19:15:02,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:02,817 INFO L225 Difference]: With dead ends: 454 [2023-04-01 19:15:02,817 INFO L226 Difference]: Without dead ends: 342 [2023-04-01 19:15:02,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1061 GetRequests, 826 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8949 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=16737, Invalid=39195, Unknown=0, NotChecked=0, Total=55932 [2023-04-01 19:15:02,822 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 265 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:02,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 52 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:15:02,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-04-01 19:15:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2023-04-01 19:15:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 333 states have (on average 1.135135135135135) internal successors, (378), 333 states have internal predecessors, (378), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 387 transitions. [2023-04-01 19:15:02,835 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 387 transitions. Word has length 416 [2023-04-01 19:15:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:02,835 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 387 transitions. [2023-04-01 19:15:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.225) internal successors, (267), 119 states have internal predecessors, (267), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 387 transitions. [2023-04-01 19:15:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-04-01 19:15:02,838 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:02,838 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:02,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:15:03,041 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:03,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -827307093, now seen corresponding path program 10 times [2023-04-01 19:15:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:03,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986310694] [2023-04-01 19:15:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:08,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:08,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2023-04-01 19:15:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:08,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2023-04-01 19:15:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:08,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 369 [2023-04-01 19:15:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:08,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986310694] [2023-04-01 19:15:08,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986310694] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:08,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854264475] [2023-04-01 19:15:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:15:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:08,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:08,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:15:08,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:15:08,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:08,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1646 conjuncts, 105 conjunts are in the unsatisfiable core [2023-04-01 19:15:08,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:09,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:09,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 14390 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854264475] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:18,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:18,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 212 [2023-04-01 19:15:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630211073] [2023-04-01 19:15:18,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 212 states [2023-04-01 19:15:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 212 interpolants. [2023-04-01 19:15:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22157, Invalid=22575, Unknown=0, NotChecked=0, Total=44732 [2023-04-01 19:15:18,399 INFO L87 Difference]: Start difference. First operand 341 states and 387 transitions. Second operand has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:31,825 INFO L93 Difference]: Finished difference Result 679 states and 875 transitions. [2023-04-01 19:15:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-04-01 19:15:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 434 [2023-04-01 19:15:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:31,829 INFO L225 Difference]: With dead ends: 679 [2023-04-01 19:15:31,829 INFO L226 Difference]: Without dead ends: 551 [2023-04-01 19:15:31,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27502 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=66046, Invalid=109934, Unknown=0, NotChecked=0, Total=175980 [2023-04-01 19:15:31,836 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 446 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:31,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 32 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:15:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-04-01 19:15:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2023-04-01 19:15:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 543 states have (on average 1.0828729281767955) internal successors, (588), 543 states have internal predecessors, (588), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 597 transitions. [2023-04-01 19:15:31,864 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 597 transitions. Word has length 434 [2023-04-01 19:15:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:31,865 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 597 transitions. [2023-04-01 19:15:31,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 212 states, 212 states have (on average 2.108490566037736) internal successors, (447), 211 states have internal predecessors, (447), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:31,865 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 597 transitions. [2023-04-01 19:15:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-04-01 19:15:31,868 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:31,868 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:31,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:32,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:15:32,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:32,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -754954083, now seen corresponding path program 11 times [2023-04-01 19:15:32,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:32,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613422444] [2023-04-01 19:15:32,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:53,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2023-04-01 19:15:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:53,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2023-04-01 19:15:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:53,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 579 [2023-04-01 19:15:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 47045 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:53,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:53,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613422444] [2023-04-01 19:15:53,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613422444] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:53,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358579326] [2023-04-01 19:15:53,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:15:53,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:53,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:53,311 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:53,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process