/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-examples/standard_vararg_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:39:14,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:39:14,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:39:14,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 18:39:14,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 18:39:14,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 18:39:14,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 18:39:14,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 18:39:14,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 18:39:14,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 18:39:14,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 18:39:14,766 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 18:39:14,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:39:14,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:39:14,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:39:14,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:39:14,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:39:14,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:39:14,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:39:14,773 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:39:14,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:39:14,775 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:39:14,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:39:14,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:39:14,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 18:39:14,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 18:39:14,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 18:39:14,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 18:39:14,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 18:39:14,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 18:39:14,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 18:39:14,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 18:39:14,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 18:39:14,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 18:39:14,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 18:39:14,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 18:39:14,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 18:39:14,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 18:39:14,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:39:14,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:39:14,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:39:14,788 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 18:39:14,805 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:39:14,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:39:14,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:39:14,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:39:14,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:39:14,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:39:14,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:39:14,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:39:14,807 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:39:14,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:39:14,807 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:39:14,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:39:14,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:39:14,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:39:14,809 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:39:14,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:39:14,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:39:14,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:39:14,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:39:14,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:39:14,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:39:14,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:39:14,811 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:39:14,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:39:14,811 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:39:14,811 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:39:15,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:39:15,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:39:15,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:39:15,049 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:39:15,049 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:39:15,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-04-01 18:39:16,239 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:39:16,426 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:39:16,427 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vararg_ground.i [2023-04-01 18:39:16,434 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8500f9184/8f4170b52c374149ae2b2f1585915259/FLAGbe104c7ee [2023-04-01 18:39:16,446 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8500f9184/8f4170b52c374149ae2b2f1585915259 [2023-04-01 18:39:16,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:39:16,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:39:16,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:39:16,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:39:16,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:39:16,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531f539b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16, skipping insertion in model container [2023-04-01 18:39:16,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,467 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:39:16,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:39:16,579 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-examples/standard_vararg_ground.i[815,828] [2023-04-01 18:39:16,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:39:16,597 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:39:16,608 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-examples/standard_vararg_ground.i[815,828] [2023-04-01 18:39:16,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:39:16,621 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:39:16,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16 WrapperNode [2023-04-01 18:39:16,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:39:16,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:39:16,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:39:16,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:39:16,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:39:16,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:39:16,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:39:16,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:39:16,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (1/1) ... [2023-04-01 18:39:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:39:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:16,677 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 18:39:16,679 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 18:39:16,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:39:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:39:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:39:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:39:16,705 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:39:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:39:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:39:16,705 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:39:16,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:39:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:39:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:39:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:39:16,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:39:16,780 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:39:16,782 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:39:16,924 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:39:16,929 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:39:16,929 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:39:16,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:39:16 BoogieIcfgContainer [2023-04-01 18:39:16,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:39:16,933 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:39:16,933 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:39:16,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:39:16,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:39:16" (1/3) ... [2023-04-01 18:39:16,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e05cd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:39:16, skipping insertion in model container [2023-04-01 18:39:16,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:39:16" (2/3) ... [2023-04-01 18:39:16,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e05cd6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:39:16, skipping insertion in model container [2023-04-01 18:39:16,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:39:16" (3/3) ... [2023-04-01 18:39:16,938 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_vararg_ground.i [2023-04-01 18:39:16,952 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:39:16,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:39:16,999 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:39:17,008 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;@d34d262, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:39:17,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:39:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:39:17,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 18:39:17,017 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:17,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:17,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:17,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:17,022 INFO L85 PathProgramCache]: Analyzing trace with hash 736194188, now seen corresponding path program 1 times [2023-04-01 18:39:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445163041] [2023-04-01 18:39:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:17,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:39:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445163041] [2023-04-01 18:39:17,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445163041] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:39:17,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:39:17,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:39:17,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804301829] [2023-04-01 18:39:17,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:39:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:39:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:17,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:39:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:39:17,236 INFO L87 Difference]: Start difference. First operand has 26 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:17,300 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2023-04-01 18:39:17,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:39:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 18:39:17,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:17,307 INFO L225 Difference]: With dead ends: 44 [2023-04-01 18:39:17,307 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 18:39:17,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 18:39:17,312 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:17,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:39:17,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 18:39:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 18:39:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 18:39:17,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2023-04-01 18:39:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:17,343 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 18:39:17,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 18:39:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:39:17,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:17,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:17,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:39:17,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:17,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:17,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1290536946, now seen corresponding path program 1 times [2023-04-01 18:39:17,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:17,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908788083] [2023-04-01 18:39:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:39:17,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:17,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908788083] [2023-04-01 18:39:17,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908788083] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:39:17,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:39:17,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:39:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459964286] [2023-04-01 18:39:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:39:17,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:39:17,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:17,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:39:17,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:39:17,452 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:17,509 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-04-01 18:39:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:39:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 18:39:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:17,511 INFO L225 Difference]: With dead ends: 36 [2023-04-01 18:39:17,511 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 18:39:17,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:39:17,513 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:17,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:39:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 18:39:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 18:39:17,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 18:39:17,521 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2023-04-01 18:39:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:17,521 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 18:39:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 18:39:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 18:39:17,522 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:17,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:39:17,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:17,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash -676788052, now seen corresponding path program 1 times [2023-04-01 18:39:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001691576] [2023-04-01 18:39:17,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:17,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:39:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001691576] [2023-04-01 18:39:17,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001691576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861419696] [2023-04-01 18:39:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:17,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:17,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:17,687 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 18:39:17,708 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 18:39:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:17,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:39:17,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:39:17,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:39:17,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861419696] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:17,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:17,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:39:17,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142243776] [2023-04-01 18:39:17,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:17,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:39:17,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:39:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:39:17,854 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:17,970 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-04-01 18:39:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:39:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 18:39:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:17,972 INFO L225 Difference]: With dead ends: 41 [2023-04-01 18:39:17,972 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 18:39:17,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:39:17,973 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:17,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:39:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 18:39:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 18:39:17,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 18:39:17,987 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2023-04-01 18:39:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:17,988 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 18:39:17,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 18:39:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 18:39:17,989 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:17,989 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:17,996 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 18:39:18,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:18,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:18,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:18,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1843552890, now seen corresponding path program 2 times [2023-04-01 18:39:18,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:18,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817722075] [2023-04-01 18:39:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:18,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 18:39:18,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:18,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817722075] [2023-04-01 18:39:18,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817722075] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:39:18,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:39:18,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:39:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386102758] [2023-04-01 18:39:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:39:18,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:39:18,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:18,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:39:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:39:18,302 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:18,353 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2023-04-01 18:39:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:39:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 18:39:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:18,355 INFO L225 Difference]: With dead ends: 42 [2023-04-01 18:39:18,355 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 18:39:18,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:39:18,356 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:18,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:39:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 18:39:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 18:39:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 18:39:18,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2023-04-01 18:39:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:18,363 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 18:39:18,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 18:39:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 18:39:18,364 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:18,364 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:39:18,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:18,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -480324981, now seen corresponding path program 1 times [2023-04-01 18:39:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:18,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363656438] [2023-04-01 18:39:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:18,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:18,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:18,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:18,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363656438] [2023-04-01 18:39:18,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363656438] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:18,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55325748] [2023-04-01 18:39:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:18,517 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 18:39:18,520 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 18:39:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:18,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:39:18,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:18,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:18,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55325748] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:18,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:18,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:39:18,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877272570] [2023-04-01 18:39:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:18,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:39:18,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:39:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:39:18,664 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:18,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:18,861 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-04-01 18:39:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:39:18,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-04-01 18:39:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:18,863 INFO L225 Difference]: With dead ends: 57 [2023-04-01 18:39:18,863 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 18:39:18,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:39:18,864 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:18,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 27 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:39:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 18:39:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-04-01 18:39:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-04-01 18:39:18,872 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 25 [2023-04-01 18:39:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:18,872 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-04-01 18:39:18,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-04-01 18:39:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 18:39:18,873 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:18,873 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:18,905 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 18:39:19,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:19,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:19,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2046819519, now seen corresponding path program 2 times [2023-04-01 18:39:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377344816] [2023-04-01 18:39:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:19,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:19,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377344816] [2023-04-01 18:39:19,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377344816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:19,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239573801] [2023-04-01 18:39:19,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:39:19,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:19,367 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 18:39:19,369 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 18:39:19,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:39:19,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:19,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:39:19,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:19,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239573801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:19,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:19,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:39:19,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547365167] [2023-04-01 18:39:19,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:19,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:39:19,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:39:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:39:19,743 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:20,168 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2023-04-01 18:39:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:39:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-04-01 18:39:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:20,169 INFO L225 Difference]: With dead ends: 81 [2023-04-01 18:39:20,169 INFO L226 Difference]: Without dead ends: 66 [2023-04-01 18:39:20,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:39:20,171 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:20,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:39:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-01 18:39:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-04-01 18:39:20,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:20,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-04-01 18:39:20,181 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 37 [2023-04-01 18:39:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:20,181 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-04-01 18:39:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:20,182 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-04-01 18:39:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 18:39:20,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:20,183 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:20,191 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 18:39:20,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:20,389 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:20,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:20,389 INFO L85 PathProgramCache]: Analyzing trace with hash -488487129, now seen corresponding path program 3 times [2023-04-01 18:39:20,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:20,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924457907] [2023-04-01 18:39:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:21,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:21,010 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 18:39:21,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924457907] [2023-04-01 18:39:21,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924457907] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:21,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952644560] [2023-04-01 18:39:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:39:21,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:21,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:21,012 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 18:39:21,044 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 18:39:21,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:39:21,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:21,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2023-04-01 18:39:21,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:21,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:39:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:39:21,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:21,588 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 18:39:21,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 12 [2023-04-01 18:39:21,676 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-04-01 18:39:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952644560] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:21,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 39 [2023-04-01 18:39:21,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710555520] [2023-04-01 18:39:21,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 18:39:21,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:21,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 18:39:21,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1143, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 18:39:21,681 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:22,586 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2023-04-01 18:39:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 18:39:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-04-01 18:39:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:22,588 INFO L225 Difference]: With dead ends: 92 [2023-04-01 18:39:22,588 INFO L226 Difference]: Without dead ends: 77 [2023-04-01 18:39:22,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1063, Invalid=3767, Unknown=0, NotChecked=0, Total=4830 [2023-04-01 18:39:22,590 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 92 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:22,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 63 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:39:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-04-01 18:39:22,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2023-04-01 18:39:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:39:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2023-04-01 18:39:22,602 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 61 [2023-04-01 18:39:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:22,603 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2023-04-01 18:39:22,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:22,603 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2023-04-01 18:39:22,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-04-01 18:39:22,604 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:22,604 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:22,615 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 18:39:22,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:22,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:22,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1891255327, now seen corresponding path program 1 times [2023-04-01 18:39:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:22,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734904611] [2023-04-01 18:39:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:23,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:23,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:39:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:39:23,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734904611] [2023-04-01 18:39:23,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734904611] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796372543] [2023-04-01 18:39:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:23,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:23,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:23,381 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 18:39:23,384 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 18:39:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:23,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 18:39:23,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:39:23,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:39:24,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796372543] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:24,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:24,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2023-04-01 18:39:24,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25022018] [2023-04-01 18:39:24,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:24,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-04-01 18:39:24,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:24,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-04-01 18:39:24,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 18:39:24,314 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:39:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:25,543 INFO L93 Difference]: Finished difference Result 145 states and 173 transitions. [2023-04-01 18:39:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-04-01 18:39:25,544 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 71 [2023-04-01 18:39:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:25,546 INFO L225 Difference]: With dead ends: 145 [2023-04-01 18:39:25,546 INFO L226 Difference]: Without dead ends: 124 [2023-04-01 18:39:25,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2023-04-01 18:39:25,550 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 114 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:25,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 32 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:39:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-01 18:39:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-04-01 18:39:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 117 states have internal predecessors, (119), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:39:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2023-04-01 18:39:25,561 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 71 [2023-04-01 18:39:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:25,561 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2023-04-01 18:39:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.25) internal successors, (117), 51 states have internal predecessors, (117), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:39:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2023-04-01 18:39:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-04-01 18:39:25,563 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:25,563 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:25,576 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 18:39:25,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:25,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:25,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1115646067, now seen corresponding path program 2 times [2023-04-01 18:39:25,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:25,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596417325] [2023-04-01 18:39:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:25,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:27,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-04-01 18:39:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:39:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596417325] [2023-04-01 18:39:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596417325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:27,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540472185] [2023-04-01 18:39:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:39:27,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:27,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:27,642 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 18:39:27,644 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 18:39:27,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:39:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:27,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 18:39:27,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:39:27,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2310 backedges. 2 proven. 2304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:39:30,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540472185] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:30,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:30,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51, 51] total 102 [2023-04-01 18:39:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896540090] [2023-04-01 18:39:30,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-04-01 18:39:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-04-01 18:39:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2023-04-01 18:39:30,483 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:39:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:33,988 INFO L93 Difference]: Finished difference Result 245 states and 298 transitions. [2023-04-01 18:39:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-04-01 18:39:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2023-04-01 18:39:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:33,990 INFO L225 Difference]: With dead ends: 245 [2023-04-01 18:39:33,990 INFO L226 Difference]: Without dead ends: 224 [2023-04-01 18:39:33,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2023-04-01 18:39:34,000 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 214 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:34,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 32 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:39:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-04-01 18:39:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2023-04-01 18:39:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 216 states have (on average 1.0138888888888888) internal successors, (219), 217 states have internal predecessors, (219), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:39:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 226 transitions. [2023-04-01 18:39:34,017 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 226 transitions. Word has length 121 [2023-04-01 18:39:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:34,017 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 226 transitions. [2023-04-01 18:39:34,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.127450980392157) internal successors, (217), 101 states have internal predecessors, (217), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:39:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 226 transitions. [2023-04-01 18:39:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-04-01 18:39:34,020 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:34,020 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:39:34,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:34,236 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:34,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:34,236 INFO L85 PathProgramCache]: Analyzing trace with hash -884066327, now seen corresponding path program 3 times [2023-04-01 18:39:34,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:34,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217437192] [2023-04-01 18:39:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:34,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:39,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:39,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2023-04-01 18:39:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 2 proven. 9604 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:39:39,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217437192] [2023-04-01 18:39:39,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217437192] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:39,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80100502] [2023-04-01 18:39:39,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:39:39,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:39,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:39,857 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 18:39:39,860 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 18:39:39,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 18:39:39,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:39,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 18:39:40,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:39:40,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9610 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-04-01 18:39:40,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80100502] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:40,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:40,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 108 [2023-04-01 18:39:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417651395] [2023-04-01 18:39:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:40,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-04-01 18:39:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-04-01 18:39:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5072, Invalid=6484, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 18:39:40,713 INFO L87 Difference]: Start difference. First operand 224 states and 226 transitions. Second operand has 108 states, 108 states have (on average 2.1481481481481484) internal successors, (232), 107 states have internal predecessors, (232), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:39:45,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:45,196 INFO L93 Difference]: Finished difference Result 256 states and 262 transitions. [2023-04-01 18:39:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-04-01 18:39:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.1481481481481484) internal successors, (232), 107 states have internal predecessors, (232), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 221 [2023-04-01 18:39:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:45,199 INFO L225 Difference]: With dead ends: 256 [2023-04-01 18:39:45,199 INFO L226 Difference]: Without dead ends: 229 [2023-04-01 18:39:45,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 438 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=15593, Invalid=28717, Unknown=0, NotChecked=0, Total=44310 [2023-04-01 18:39:45,203 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 225 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:45,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 62 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:39:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-04-01 18:39:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2023-04-01 18:39:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 221 states have internal predecessors, (223), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:39:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2023-04-01 18:39:45,223 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 221 [2023-04-01 18:39:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:45,224 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2023-04-01 18:39:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.1481481481481484) internal successors, (232), 107 states have internal predecessors, (232), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:39:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2023-04-01 18:39:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-04-01 18:39:45,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:45,226 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:45,240 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 18:39:45,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:45,433 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:45,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1661706676, now seen corresponding path program 4 times [2023-04-01 18:39:45,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:45,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631542713] [2023-04-01 18:39:45,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:45,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:50,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:50,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 213 [2023-04-01 18:39:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9811 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:39:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:50,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631542713] [2023-04-01 18:39:50,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631542713] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094450452] [2023-04-01 18:39:50,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:39:50,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:50,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:50,737 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 18:39:50,740 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 18:39:50,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:39:50,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:51,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 18:39:51,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9811 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 18:39:51,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:40:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9811 backedges. 2 proven. 9801 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:40:00,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094450452] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:40:00,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:40:00,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 102] total 204 [2023-04-01 18:40:00,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290715046] [2023-04-01 18:40:00,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:40:00,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2023-04-01 18:40:00,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:40:00,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2023-04-01 18:40:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20505, Invalid=20907, Unknown=0, NotChecked=0, Total=41412 [2023-04-01 18:40:00,394 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 204 states, 204 states have (on average 2.0637254901960786) internal successors, (421), 203 states have internal predecessors, (421), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:40:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:40:13,425 INFO L93 Difference]: Finished difference Result 453 states and 557 transitions. [2023-04-01 18:40:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2023-04-01 18:40:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 204 states, 204 states have (on average 2.0637254901960786) internal successors, (421), 203 states have internal predecessors, (421), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 225 [2023-04-01 18:40:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:40:13,428 INFO L225 Difference]: With dead ends: 453 [2023-04-01 18:40:13,428 INFO L226 Difference]: Without dead ends: 430 [2023-04-01 18:40:13,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25444 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=61106, Invalid=101706, Unknown=0, NotChecked=0, Total=162812 [2023-04-01 18:40:13,436 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 418 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:40:13,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 37 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:40:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-04-01 18:40:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2023-04-01 18:40:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 422 states have (on average 1.0071090047393365) internal successors, (425), 423 states have internal predecessors, (425), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:40:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 432 transitions. [2023-04-01 18:40:13,461 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 432 transitions. Word has length 225 [2023-04-01 18:40:13,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:40:13,461 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 432 transitions. [2023-04-01 18:40:13,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 204 states, 204 states have (on average 2.0637254901960786) internal successors, (421), 203 states have internal predecessors, (421), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:40:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 432 transitions. [2023-04-01 18:40:13,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-04-01 18:40:13,467 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:40:13,467 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:40:13,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 18:40:13,674 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,SelfDestructingSolverStorable10 [2023-04-01 18:40:13,674 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:40:13,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:40:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1231794210, now seen corresponding path program 5 times [2023-04-01 18:40:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:40:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944656518] [2023-04-01 18:40:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:40:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:40:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:40:33,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:40:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:40:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 415 [2023-04-01 18:40:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:40:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40010 backedges. 2 proven. 40000 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 18:40:33,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:40:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944656518] [2023-04-01 18:40:33,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944656518] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:40:33,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351522467] [2023-04-01 18:40:33,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:40:33,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:40:33,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:40:33,171 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 18:40:33,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process