/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:42:06,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:42:06,776 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:42:06,780 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:42:06,781 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:42:06,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:42:06,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:42:06,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:42:06,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:42:06,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:42:06,821 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:42:06,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:42:06,822 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:42:06,822 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:42:06,823 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:42:06,823 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:42:06,823 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:42:06,823 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:42:06,824 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:42:06,824 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:42:06,824 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:42:06,825 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:42:06,825 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:42:06,825 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:42:06,826 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:42:06,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:42:06,827 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:42:06,827 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:42:06,827 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:42:06,828 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:42:06,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:42:06,829 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:42:06,829 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:42:06,829 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:42:06,829 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:42:06,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:42:06,830 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:42:06,830 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:42:06,830 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:42:06,830 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:42:06,831 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:42:06,831 INFO L153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:42:07,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:42:07,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:42:07,124 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:42:07,125 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:42:07,126 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:42:07,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i [2023-08-04 07:42:08,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:42:08,576 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:42:08,577 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i [2023-08-04 07:42:08,593 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddbc92881/9d13543299e144de935e6b097545466a/FLAG5f23bb211 [2023-08-04 07:42:08,607 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddbc92881/9d13543299e144de935e6b097545466a [2023-08-04 07:42:08,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:42:08,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:42:08,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:42:08,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:42:08,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:42:08,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:42:08" (1/1) ... [2023-08-04 07:42:08,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba99a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:08, skipping insertion in model container [2023-08-04 07:42:08,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:42:08" (1/1) ... [2023-08-04 07:42:08,668 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:42:08,984 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i[30241,30254] [2023-08-04 07:42:09,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:42:09,018 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:42:09,045 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-04 07:42:09,047 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-04 07:42:09,073 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_safe-5_bound2.i[30241,30254] [2023-08-04 07:42:09,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:42:09,113 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:42:09,113 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:42:09,119 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:42:09,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09 WrapperNode [2023-08-04 07:42:09,120 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:42:09,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:42:09,122 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:42:09,122 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:42:09,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,161 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,183 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-04 07:42:09,183 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:42:09,184 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:42:09,184 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:42:09,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:42:09,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,205 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,207 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:42:09,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:42:09,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:42:09,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:42:09,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (1/1) ... [2023-08-04 07:42:09,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:42:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:09,262 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) [2023-08-04 07:42:09,288 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 [2023-08-04 07:42:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 07:42:09,306 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 07:42:09,306 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 07:42:09,307 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 07:42:09,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:42:09,308 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:42:09,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:42:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:42:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:42:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:42:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:42:09,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:42:09,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:42:09,311 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:42:09,464 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:42:09,466 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:42:09,680 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:42:09,686 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:42:09,686 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 07:42:09,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:42:09 BoogieIcfgContainer [2023-08-04 07:42:09,688 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:42:09,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:42:09,690 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:42:09,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:42:09,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:42:08" (1/3) ... [2023-08-04 07:42:09,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325ec4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:42:09, skipping insertion in model container [2023-08-04 07:42:09,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:42:09" (2/3) ... [2023-08-04 07:42:09,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@325ec4e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:42:09, skipping insertion in model container [2023-08-04 07:42:09,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:42:09" (3/3) ... [2023-08-04 07:42:09,699 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_safe-5_bound2.i [2023-08-04 07:42:09,706 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:42:09,714 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:42:09,715 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:42:09,715 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:42:09,803 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:42:09,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,926 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:42:09,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:09,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:42:09,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,943 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:42:09,951 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,953 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:09,986 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:42:09,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:09,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:42:09,991 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 07:42:13,137 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-04 07:42:13,137 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 07:42:13,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:42:13,153 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;@2dfd3fa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:42:13,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:42:13,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:42:13,156 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 07:42:13,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:13,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:13,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:42:13,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:13,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:13,161 INFO L85 PathProgramCache]: Analyzing trace with hash 12905250, now seen corresponding path program 1 times [2023-08-04 07:42:13,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:13,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4342874] [2023-08-04 07:42:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:13,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:42:13,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4342874] [2023-08-04 07:42:13,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4342874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:13,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:42:13,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:42:13,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732442689] [2023-08-04 07:42:13,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:13,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:13,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:13,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:42:13,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:42:13,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:13,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:42:13,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:13,500 INFO L124 PetriNetUnfolderBase]: 136/222 cut-off events. [2023-08-04 07:42:13,500 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:13,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456 conditions, 222 events. 136/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 587 event pairs, 30 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 438. Up to 211 conditions per place. [2023-08-04 07:42:13,504 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 18 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-08-04 07:42:13,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 102 flow [2023-08-04 07:42:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-04 07:42:13,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4864433811802233 [2023-08-04 07:42:13,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-04 07:42:13,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-04 07:42:13,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:13,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-04 07:42:13,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,540 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,541 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 50 flow. Second operand 3 states and 305 transitions. [2023-08-04 07:42:13,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 102 flow [2023-08-04 07:42:13,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:42:13,546 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 48 flow [2023-08-04 07:42:13,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-04 07:42:13,553 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-08-04 07:42:13,553 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 48 flow [2023-08-04 07:42:13,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:13,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:13,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:42:13,554 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:13,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:13,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1552267812, now seen corresponding path program 1 times [2023-08-04 07:42:13,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:13,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751128605] [2023-08-04 07:42:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:13,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:42:13,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:13,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751128605] [2023-08-04 07:42:13,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751128605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:13,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903651633] [2023-08-04 07:42:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:13,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:13,697 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) [2023-08-04 07:42:13,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:42:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:13,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:42:13,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:42:13,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:42:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903651633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:13,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:42:13,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:42:13,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481460319] [2023-08-04 07:42:13,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:13,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:13,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:13,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:42:13,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:13,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:42:13,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:13,848 INFO L124 PetriNetUnfolderBase]: 106/168 cut-off events. [2023-08-04 07:42:13,849 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:42:13,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 168 events. 106/168 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 410 event pairs, 28 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 345. Up to 136 conditions per place. [2023-08-04 07:42:13,850 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 21 selfloop transitions, 2 changer transitions 1/24 dead transitions. [2023-08-04 07:42:13,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 110 flow [2023-08-04 07:42:13,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:13,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:13,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 07:42:13,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48963317384370014 [2023-08-04 07:42:13,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 07:42:13,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 07:42:13,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:13,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 07:42:13,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,856 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 48 flow. Second operand 3 states and 307 transitions. [2023-08-04 07:42:13,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 110 flow [2023-08-04 07:42:13,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 24 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:42:13,857 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 52 flow [2023-08-04 07:42:13,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-04 07:42:13,858 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-04 07:42:13,858 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 52 flow [2023-08-04 07:42:13,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:13,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:13,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:13,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:14,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:14,065 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:14,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 313871766, now seen corresponding path program 1 times [2023-08-04 07:42:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:14,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008299010] [2023-08-04 07:42:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:42:14,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:14,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008299010] [2023-08-04 07:42:14,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008299010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:14,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308883048] [2023-08-04 07:42:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:14,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:14,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:14,171 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) [2023-08-04 07:42:14,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:42:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:14,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:42:14,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:14,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:42:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308883048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:14,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:42:14,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:42:14,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467684475] [2023-08-04 07:42:14,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:14,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:14,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:14,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:14,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 209 [2023-08-04 07:42:14,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:14,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 209 [2023-08-04 07:42:14,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:14,321 INFO L124 PetriNetUnfolderBase]: 124/195 cut-off events. [2023-08-04 07:42:14,322 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 07:42:14,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 195 events. 124/195 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 448 event pairs, 50 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 426. Up to 132 conditions per place. [2023-08-04 07:42:14,323 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 22 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-04 07:42:14,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 114 flow [2023-08-04 07:42:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:14,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:14,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 07:42:14,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48963317384370014 [2023-08-04 07:42:14,325 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 07:42:14,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 07:42:14,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:14,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 07:42:14,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,329 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,329 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 52 flow. Second operand 3 states and 307 transitions. [2023-08-04 07:42:14,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 114 flow [2023-08-04 07:42:14,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 24 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:42:14,331 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 60 flow [2023-08-04 07:42:14,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-08-04 07:42:14,331 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2023-08-04 07:42:14,332 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 60 flow [2023-08-04 07:42:14,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:14,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:14,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:42:14,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:14,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1140090476, now seen corresponding path program 1 times [2023-08-04 07:42:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:14,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218971568] [2023-08-04 07:42:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:14,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:14,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:14,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218971568] [2023-08-04 07:42:14,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218971568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:14,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947717532] [2023-08-04 07:42:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:14,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:14,646 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) [2023-08-04 07:42:14,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:42:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:14,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:42:14,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:14,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947717532] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:14,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:14,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:42:14,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034961888] [2023-08-04 07:42:14,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:14,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:42:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:42:14,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 209 [2023-08-04 07:42:14,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:14,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 209 [2023-08-04 07:42:14,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:14,812 INFO L124 PetriNetUnfolderBase]: 7/18 cut-off events. [2023-08-04 07:42:14,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:14,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 18 events. 7/18 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 42. Up to 12 conditions per place. [2023-08-04 07:42:14,813 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:42:14,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 11 transitions, 52 flow [2023-08-04 07:42:14,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:42:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:42:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 384 transitions. [2023-08-04 07:42:14,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45933014354066987 [2023-08-04 07:42:14,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 384 transitions. [2023-08-04 07:42:14,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 384 transitions. [2023-08-04 07:42:14,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:14,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 384 transitions. [2023-08-04 07:42:14,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,819 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 60 flow. Second operand 4 states and 384 transitions. [2023-08-04 07:42:14,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 11 transitions, 52 flow [2023-08-04 07:42:14,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 48 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:42:14,820 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-04 07:42:14,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-04 07:42:14,820 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -7 predicate places. [2023-08-04 07:42:14,821 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-04 07:42:14,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.0) internal successors, (480), 5 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:14,823 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:42:14,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:15,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:15,030 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:42:15,031 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:42:15,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,052 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:42:15,052 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:15,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:42:15,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:42:15,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 07:42:15,081 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 07:42:15,081 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:15,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 07:42:15,084 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 07:42:17,883 INFO L134 LiptonReduction]: Checked pairs total: 2000 [2023-08-04 07:42:17,883 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 07:42:17,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:42:17,886 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;@2dfd3fa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:42:17,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:42:17,889 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:42:17,889 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-04 07:42:17,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:17,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:17,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:42:17,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:42:17,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1773916636, now seen corresponding path program 1 times [2023-08-04 07:42:17,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:17,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487284940] [2023-08-04 07:42:17,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:42:17,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:42:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:42:17,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:42:17,932 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:42:17,933 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:42:17,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:42:17,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:42:17,933 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:42:17,934 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:42:17,935 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:42:17,935 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:42:17,949 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:42:17,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:17,991 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 07:42:17,992 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:42:17,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 07:42:17,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:17,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:17,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:42:17,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:17,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 07:42:18,037 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 07:42:18,038 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 07:42:18,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 07:42:18,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 07:42:20,367 INFO L134 LiptonReduction]: Checked pairs total: 12666 [2023-08-04 07:42:20,368 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 07:42:20,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:42:20,370 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;@2dfd3fa0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:42:20,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:42:20,372 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:42:20,372 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 07:42:20,372 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:42:20,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:20,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 07:42:20,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:20,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:20,373 INFO L85 PathProgramCache]: Analyzing trace with hash 24021282, now seen corresponding path program 1 times [2023-08-04 07:42:20,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:20,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094630997] [2023-08-04 07:42:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:20,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:20,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:42:20,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094630997] [2023-08-04 07:42:20,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094630997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:20,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:42:20,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:42:20,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911825050] [2023-08-04 07:42:20,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:20,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:20,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:20,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:42:20,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:42:20,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:20,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:20,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:42:20,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:20,850 INFO L124 PetriNetUnfolderBase]: 3244/5215 cut-off events. [2023-08-04 07:42:20,850 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 07:42:20,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 5215 events. 3244/5215 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29125 event pairs, 1386 based on Foata normal form. 0/4666 useless extension candidates. Maximal degree in co-relation 3009. Up to 4201 conditions per place. [2023-08-04 07:42:20,883 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2023-08-04 07:42:20,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-04 07:42:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 07:42:20,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-04 07:42:20,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 07:42:20,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 07:42:20,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:20,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 07:42:20,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:20,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:20,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:20,896 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-04 07:42:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-04 07:42:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 07:42:20,901 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 106 flow [2023-08-04 07:42:20,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 07:42:20,903 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 07:42:20,903 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 106 flow [2023-08-04 07:42:20,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:20,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:20,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:20,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:42:20,904 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:20,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1241956221, now seen corresponding path program 1 times [2023-08-04 07:42:20,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:20,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880296899] [2023-08-04 07:42:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:42:20,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880296899] [2023-08-04 07:42:20,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880296899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:20,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759837117] [2023-08-04 07:42:20,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:20,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:20,973 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) [2023-08-04 07:42:21,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:42:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:21,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:42:21,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:42:21,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:42:21,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759837117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:21,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:42:21,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:42:21,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165975729] [2023-08-04 07:42:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:21,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:21,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:42:21,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:21,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:42:21,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:21,344 INFO L124 PetriNetUnfolderBase]: 2665/4138 cut-off events. [2023-08-04 07:42:21,344 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 07:42:21,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7764 conditions, 4138 events. 2665/4138 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20672 event pairs, 1120 based on Foata normal form. 0/3776 useless extension candidates. Maximal degree in co-relation 7725. Up to 3271 conditions per place. [2023-08-04 07:42:21,378 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 07:42:21,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 202 flow [2023-08-04 07:42:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 07:42:21,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 07:42:21,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 07:42:21,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 07:42:21,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:21,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 07:42:21,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,386 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 106 flow. Second operand 3 states and 379 transitions. [2023-08-04 07:42:21,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 202 flow [2023-08-04 07:42:21,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:42:21,389 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 116 flow [2023-08-04 07:42:21,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-04 07:42:21,390 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 07:42:21,390 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 116 flow [2023-08-04 07:42:21,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:21,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:21,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:21,591 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 [2023-08-04 07:42:21,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:21,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:21,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1509788594, now seen corresponding path program 1 times [2023-08-04 07:42:21,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:21,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391991764] [2023-08-04 07:42:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:21,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:42:21,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:21,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391991764] [2023-08-04 07:42:21,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391991764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:21,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991553062] [2023-08-04 07:42:21,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:21,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:21,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:21,646 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) [2023-08-04 07:42:21,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:42:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:21,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:42:21,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:21,731 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:42:21,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991553062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:42:21,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:42:21,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 07:42:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229830547] [2023-08-04 07:42:21,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:42:21,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:42:21,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:42:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:21,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 07:42:21,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:21,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:21,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 07:42:21,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:22,052 INFO L124 PetriNetUnfolderBase]: 3169/4738 cut-off events. [2023-08-04 07:42:22,052 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-08-04 07:42:22,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4738 events. 3169/4738 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 23033 event pairs, 1310 based on Foata normal form. 0/4480 useless extension candidates. Maximal degree in co-relation 2910. Up to 2655 conditions per place. [2023-08-04 07:42:22,091 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 38 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 07:42:22,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 222 flow [2023-08-04 07:42:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:42:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:42:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-04 07:42:22,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-04 07:42:22,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-04 07:42:22,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-04 07:42:22,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:22,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-04 07:42:22,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,098 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 116 flow. Second operand 3 states and 381 transitions. [2023-08-04 07:42:22,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 222 flow [2023-08-04 07:42:22,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:42:22,101 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 126 flow [2023-08-04 07:42:22,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 07:42:22,102 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 07:42:22,102 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 126 flow [2023-08-04 07:42:22,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:22,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:22,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:22,308 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 [2023-08-04 07:42:22,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:22,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:22,309 INFO L85 PathProgramCache]: Analyzing trace with hash 441194526, now seen corresponding path program 1 times [2023-08-04 07:42:22,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:22,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039650757] [2023-08-04 07:42:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:22,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039650757] [2023-08-04 07:42:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039650757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869854932] [2023-08-04 07:42:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:22,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:22,372 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) [2023-08-04 07:42:22,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 07:42:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:22,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:42:22,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:22,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:42:22,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869854932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:22,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:22,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:42:22,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957566286] [2023-08-04 07:42:22,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:22,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:42:22,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:42:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:22,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:42:22,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:22,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:42:22,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:22,752 INFO L124 PetriNetUnfolderBase]: 2557/3808 cut-off events. [2023-08-04 07:42:22,752 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2023-08-04 07:42:22,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 3808 events. 2557/3808 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17627 event pairs, 690 based on Foata normal form. 3/3617 useless extension candidates. Maximal degree in co-relation 5074. Up to 3196 conditions per place. [2023-08-04 07:42:22,785 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 35 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 07:42:22,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 226 flow [2023-08-04 07:42:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:42:22,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:42:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 07:42:22,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168776371308017 [2023-08-04 07:42:22,787 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 07:42:22,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 07:42:22,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:22,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 07:42:22,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,791 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 126 flow. Second operand 4 states and 490 transitions. [2023-08-04 07:42:22,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 226 flow [2023-08-04 07:42:22,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:42:22,793 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 138 flow [2023-08-04 07:42:22,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-04 07:42:22,795 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 07:42:22,795 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 138 flow [2023-08-04 07:42:22,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:22,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:22,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:22,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:23,000 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 [2023-08-04 07:42:23,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:23,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2053648226, now seen corresponding path program 1 times [2023-08-04 07:42:23,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324772571] [2023-08-04 07:42:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:23,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:42:23,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:23,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324772571] [2023-08-04 07:42:23,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324772571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:23,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126211646] [2023-08-04 07:42:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:23,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:23,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:23,075 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) [2023-08-04 07:42:23,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 07:42:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:23,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:42:23,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:23,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:42:23,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:42:23,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126211646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:23,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:23,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:42:23,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915393466] [2023-08-04 07:42:23,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:23,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:42:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:42:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:42:23,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:42:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:42:23,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:23,447 INFO L124 PetriNetUnfolderBase]: 2269/3139 cut-off events. [2023-08-04 07:42:23,448 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 07:42:23,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6643 conditions, 3139 events. 2269/3139 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11856 event pairs, 508 based on Foata normal form. 27/3033 useless extension candidates. Maximal degree in co-relation 4601. Up to 1768 conditions per place. [2023-08-04 07:42:23,464 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 07:42:23,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 286 flow [2023-08-04 07:42:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:42:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:42:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 07:42:23,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-04 07:42:23,466 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 07:42:23,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 07:42:23,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:23,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 07:42:23,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,469 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,469 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 138 flow. Second operand 4 states and 502 transitions. [2023-08-04 07:42:23,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 286 flow [2023-08-04 07:42:23,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 279 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:42:23,471 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 145 flow [2023-08-04 07:42:23,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-04 07:42:23,472 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 07:42:23,473 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 145 flow [2023-08-04 07:42:23,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:23,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:23,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:23,678 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 [2023-08-04 07:42:23,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:23,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:23,679 INFO L85 PathProgramCache]: Analyzing trace with hash 551738450, now seen corresponding path program 1 times [2023-08-04 07:42:23,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:23,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573044525] [2023-08-04 07:42:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:23,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:23,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573044525] [2023-08-04 07:42:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573044525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:23,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661070688] [2023-08-04 07:42:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:23,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:23,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:23,729 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) [2023-08-04 07:42:23,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:42:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:23,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:42:23,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:23,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:23,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661070688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:23,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:23,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 07:42:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007181799] [2023-08-04 07:42:23,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:23,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 07:42:23,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:23,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 07:42:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 07:42:23,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:42:23,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:23,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:23,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:42:23,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:24,147 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-04 07:42:24,147 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-08-04 07:42:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4003 events. 2917/4003 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15111 event pairs, 784 based on Foata normal form. 0/3849 useless extension candidates. Maximal degree in co-relation 4151. Up to 1587 conditions per place. [2023-08-04 07:42:24,176 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-04 07:42:24,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 411 flow [2023-08-04 07:42:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 07:42:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 07:42:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-04 07:42:24,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 07:42:24,179 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-04 07:42:24,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-04 07:42:24,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:24,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-04 07:42:24,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:24,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:24,184 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:24,184 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 145 flow. Second operand 6 states and 758 transitions. [2023-08-04 07:42:24,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 411 flow [2023-08-04 07:42:24,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 404 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:42:24,188 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 174 flow [2023-08-04 07:42:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 07:42:24,188 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-04 07:42:24,189 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 174 flow [2023-08-04 07:42:24,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:24,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:24,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:24,394 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 [2023-08-04 07:42:24,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:24,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1001370, now seen corresponding path program 2 times [2023-08-04 07:42:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:24,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507765135] [2023-08-04 07:42:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:24,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:24,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507765135] [2023-08-04 07:42:24,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507765135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:24,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250521884] [2023-08-04 07:42:24,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:42:24,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:24,486 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) [2023-08-04 07:42:24,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 07:42:24,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:42:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:42:24,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 07:42:24,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:24,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250521884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:24,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 07:42:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003578374] [2023-08-04 07:42:24,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 07:42:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 07:42:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-04 07:42:24,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:42:24,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 174 flow. Second operand has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:24,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:24,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:42:24,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:25,190 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-04 07:42:25,190 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 07:42:25,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 6433 events. 4861/6433 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22804 event pairs, 784 based on Foata normal form. 486/6846 useless extension candidates. Maximal degree in co-relation 6011. Up to 1587 conditions per place. [2023-08-04 07:42:25,240 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-04 07:42:25,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 171 transitions, 764 flow [2023-08-04 07:42:25,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 07:42:25,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 07:42:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-04 07:42:25,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-04 07:42:25,245 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-04 07:42:25,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-04 07:42:25,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:25,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-04 07:42:25,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.41666666666667) internal successors, (1517), 12 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:25,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:25,256 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:25,256 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 174 flow. Second operand 12 states and 1517 transitions. [2023-08-04 07:42:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 171 transitions, 764 flow [2023-08-04 07:42:25,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 171 transitions, 750 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 07:42:25,267 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 244 flow [2023-08-04 07:42:25,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 07:42:25,268 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 07:42:25,268 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 244 flow [2023-08-04 07:42:25,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:25,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:25,269 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:25,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 07:42:25,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:25,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:25,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:25,476 INFO L85 PathProgramCache]: Analyzing trace with hash -606565222, now seen corresponding path program 3 times [2023-08-04 07:42:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:25,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718286006] [2023-08-04 07:42:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:25,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718286006] [2023-08-04 07:42:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718286006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022340577] [2023-08-04 07:42:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:42:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:25,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:42:25,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 07:42:25,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 07:42:25,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:42:25,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 07:42:25,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:25,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022340577] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:25,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:25,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-08-04 07:42:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249769513] [2023-08-04 07:42:25,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:25,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:42:25,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:42:25,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:42:25,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 07:42:25,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 244 flow. Second operand has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:25,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:25,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 07:42:25,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:26,640 INFO L124 PetriNetUnfolderBase]: 5509/7243 cut-off events. [2023-08-04 07:42:26,641 INFO L125 PetriNetUnfolderBase]: For 9187/9187 co-relation queries the response was YES. [2023-08-04 07:42:26,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18910 conditions, 7243 events. 5509/7243 cut-off events. For 9187/9187 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 25388 event pairs, 784 based on Foata normal form. 162/7332 useless extension candidates. Maximal degree in co-relation 12491. Up to 1587 conditions per place. [2023-08-04 07:42:26,694 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 170 selfloop transitions, 13 changer transitions 0/197 dead transitions. [2023-08-04 07:42:26,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 197 transitions, 914 flow [2023-08-04 07:42:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 07:42:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 07:42:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1765 transitions. [2023-08-04 07:42:26,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319469559975889 [2023-08-04 07:42:26,699 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1765 transitions. [2023-08-04 07:42:26,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1765 transitions. [2023-08-04 07:42:26,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:26,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1765 transitions. [2023-08-04 07:42:26,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.07142857142857) internal successors, (1765), 14 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:26,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:26,708 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 237.0) internal successors, (3555), 15 states have internal predecessors, (3555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:26,708 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 244 flow. Second operand 14 states and 1765 transitions. [2023-08-04 07:42:26,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 197 transitions, 914 flow [2023-08-04 07:42:26,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 197 transitions, 862 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-08-04 07:42:26,730 INFO L231 Difference]: Finished difference. Result has 87 places, 53 transitions, 244 flow [2023-08-04 07:42:26,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=53} [2023-08-04 07:42:26,731 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 41 predicate places. [2023-08-04 07:42:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 53 transitions, 244 flow [2023-08-04 07:42:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 114.8) internal successors, (1722), 15 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:42:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:42:26,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:42:26,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 07:42:26,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:42:26,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:42:26,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1206395802, now seen corresponding path program 4 times [2023-08-04 07:42:26,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:42:26,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520359464] [2023-08-04 07:42:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:42:26,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:42:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:42:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:42:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520359464] [2023-08-04 07:42:27,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520359464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:42:27,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002578977] [2023-08-04 07:42:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 07:42:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:42:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:42:27,709 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:42:27,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:42:27,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 07:42:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:42:27,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-04 07:42:27,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:42:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:28,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:42:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:42:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002578977] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:42:29,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:42:29,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-04 07:42:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631939277] [2023-08-04 07:42:29,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:42:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-04 07:42:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:42:29,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-04 07:42:29,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1336, Unknown=0, NotChecked=0, Total=1640 [2023-08-04 07:42:29,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-04 07:42:29,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 53 transitions, 244 flow. Second operand has 41 states, 41 states have (on average 107.7560975609756) internal successors, (4418), 41 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:29,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:42:29,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-04 07:42:29,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:44:42,428 INFO L124 PetriNetUnfolderBase]: 939832/1268105 cut-off events. [2023-08-04 07:44:42,428 INFO L125 PetriNetUnfolderBase]: For 2192807/2192807 co-relation queries the response was YES. [2023-08-04 07:44:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3267902 conditions, 1268105 events. 939832/1268105 cut-off events. For 2192807/2192807 co-relation queries the response was YES. Maximal size of possible extension queue 28257. Compared 10169237 event pairs, 3442 based on Foata normal form. 4084/1272179 useless extension candidates. Maximal degree in co-relation 2310302. Up to 114834 conditions per place. [2023-08-04 07:45:00,838 INFO L140 encePairwiseOnDemand]: 230/237 looper letters, 1953 selfloop transitions, 1561 changer transitions 0/3524 dead transitions. [2023-08-04 07:45:00,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 3524 transitions, 21598 flow [2023-08-04 07:45:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2023-08-04 07:45:00,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2023-08-04 07:45:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 19809 transitions. [2023-08-04 07:45:00,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5191445868385879 [2023-08-04 07:45:00,876 INFO L72 ComplementDD]: Start complementDD. Operand 161 states and 19809 transitions. [2023-08-04 07:45:00,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 161 states and 19809 transitions. [2023-08-04 07:45:00,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:45:00,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 161 states and 19809 transitions. [2023-08-04 07:45:00,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 162 states, 161 states have (on average 123.03726708074534) internal successors, (19809), 161 states have internal predecessors, (19809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:45:00,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 162 states, 162 states have (on average 237.0) internal successors, (38394), 162 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:45:00,984 INFO L81 ComplementDD]: Finished complementDD. Result has 162 states, 162 states have (on average 237.0) internal successors, (38394), 162 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:45:00,984 INFO L175 Difference]: Start difference. First operand has 87 places, 53 transitions, 244 flow. Second operand 161 states and 19809 transitions. [2023-08-04 07:45:00,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 3524 transitions, 21598 flow Received shutdown request... [2023-08-04 07:51:30,909 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:51:30,942 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:51:31,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:51:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown