/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-wmm_safe002_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:32:29,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:32:29,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:32:29,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:32:29,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:32:29,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:32:29,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:32:29,570 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:32:29,571 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:32:29,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:32:29,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:32:29,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:32:29,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:32:29,577 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:32:29,577 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:32:29,578 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:32:29,578 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:32:29,578 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:32:29,578 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:32:29,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:32:29,579 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:32:29,579 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:32:29,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:32:29,580 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:32:29,580 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:32:29,580 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:32:29,581 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:32:29,582 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:32:29,582 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:32:29,582 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:32:29,583 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:32:29,583 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:32:29,583 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:32:29,583 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:32:29,584 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:32:29,585 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:32:29,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:32:29,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:32:29,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:32:29,830 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:32:29,831 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:32:29,832 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_rmo.oepc_bound2.i [2023-08-04 06:32:31,001 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:32:31,268 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:32:31,269 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe002_rmo.oepc_bound2.i [2023-08-04 06:32:31,297 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a1da42e/87f1ca0e17eb459ebe49968769448213/FLAG482089eb2 [2023-08-04 06:32:31,312 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a1da42e/87f1ca0e17eb459ebe49968769448213 [2023-08-04 06:32:31,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:32:31,319 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:32:31,322 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:32:31,322 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:32:31,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:32:31,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1637cfe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31, skipping insertion in model container [2023-08-04 06:32:31,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,378 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:32:31,542 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-wmm_safe002_rmo.oepc_bound2.i[993,1006] [2023-08-04 06:32:31,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:32:31,763 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:32:31,773 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-wmm_safe002_rmo.oepc_bound2.i[993,1006] [2023-08-04 06:32:31,780 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:32:31,781 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:32:31,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:32:31,868 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:32:31,868 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:32:31,874 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:32:31,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31 WrapperNode [2023-08-04 06:32:31,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:32:31,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:32:31,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:32:31,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:32:31,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,952 INFO L138 Inliner]: procedures = 176, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 194 [2023-08-04 06:32:31,953 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:32:31,954 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:32:31,954 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:32:31,954 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:32:31,961 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,977 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,978 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,991 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:31,994 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:32,012 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:32,017 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:32,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:32:32,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:32:32,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:32:32,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:32:32,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (1/1) ... [2023-08-04 06:32:32,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:32:32,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:32:32,055 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 06:32:32,077 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 06:32:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:32:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:32:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:32:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:32:32,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:32:32,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:32:32,105 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:32:32,105 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:32:32,105 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:32:32,106 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:32:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:32:32,106 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:32:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:32:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:32:32,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:32:32,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:32:32,108 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 06:32:32,251 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:32:32,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:32:32,708 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:32:32,959 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:32:32,960 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:32:32,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:32:32 BoogieIcfgContainer [2023-08-04 06:32:32,962 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:32:32,965 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:32:32,965 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:32:32,968 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:32:32,969 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:32:31" (1/3) ... [2023-08-04 06:32:32,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a176d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:32:32, skipping insertion in model container [2023-08-04 06:32:32,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:32:31" (2/3) ... [2023-08-04 06:32:32,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a176d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:32:32, skipping insertion in model container [2023-08-04 06:32:32,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:32:32" (3/3) ... [2023-08-04 06:32:32,972 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe002_rmo.oepc_bound2.i [2023-08-04 06:32:32,978 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:32:32,986 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:32:32,986 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:32:32,986 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:32:33,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:32:33,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:32:33,289 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 06:32:33,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:33,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1955 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 06:32:33,294 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:32:33,301 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 271 flow [2023-08-04 06:32:33,303 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:32:33,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 271 flow [2023-08-04 06:32:33,322 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 271 flow [2023-08-04 06:32:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 271 flow [2023-08-04 06:32:33,370 INFO L124 PetriNetUnfolderBase]: 22/362 cut-off events. [2023-08-04 06:32:33,370 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:33,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 362 events. 22/362 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1343 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 232. Up to 16 conditions per place. [2023-08-04 06:32:33,377 INFO L119 LiptonReduction]: Number of co-enabled transitions 1838 [2023-08-04 06:32:40,548 INFO L134 LiptonReduction]: Checked pairs total: 4517 [2023-08-04 06:32:40,549 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 06:32:40,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:32:40,564 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;@5721fff1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:32:40,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:32:40,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:32:40,569 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 06:32:40,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:40,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:40,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:32:40,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:40,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash 475472562, now seen corresponding path program 1 times [2023-08-04 06:32:40,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:40,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407360002] [2023-08-04 06:32:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:40,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:40,899 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 06:32:40,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:40,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407360002] [2023-08-04 06:32:40,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407360002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:40,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:32:40,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:32:40,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692652661] [2023-08-04 06:32:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:32:40,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:40,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:32:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:32:40,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 256 [2023-08-04 06:32:40,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 06:32:40,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 256 [2023-08-04 06:32:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:41,307 INFO L124 PetriNetUnfolderBase]: 826/1390 cut-off events. [2023-08-04 06:32:41,308 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:32:41,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2747 conditions, 1390 events. 826/1390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7118 event pairs, 664 based on Foata normal form. 0/1294 useless extension candidates. Maximal degree in co-relation 2734. Up to 1310 conditions per place. [2023-08-04 06:32:41,317 INFO L140 encePairwiseOnDemand]: 253/256 looper letters, 23 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 06:32:41,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 119 flow [2023-08-04 06:32:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:32:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:32:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-04 06:32:41,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2023-08-04 06:32:41,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-04 06:32:41,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-04 06:32:41,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:41,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-04 06:32:41,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 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 06:32:41,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:41,362 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:41,363 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 61 flow. Second operand 3 states and 408 transitions. [2023-08-04 06:32:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 119 flow [2023-08-04 06:32:41,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:32:41,367 INFO L231 Difference]: Finished difference. Result has 36 places, 26 transitions, 69 flow [2023-08-04 06:32:41,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2023-08-04 06:32:41,371 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-04 06:32:41,371 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 69 flow [2023-08-04 06:32:41,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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 06:32:41,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:41,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:32:41,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:32:41,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:41,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash 740619851, now seen corresponding path program 1 times [2023-08-04 06:32:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:41,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210116762] [2023-08-04 06:32:41,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:41,519 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 06:32:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210116762] [2023-08-04 06:32:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210116762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:32:41,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405903167] [2023-08-04 06:32:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:41,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:32:41,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:32:41,525 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 06:32:41,534 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 06:32:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:41,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:32:41,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:32:41,679 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 06:32:41,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:32:41,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405903167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:41,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:32:41,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:32:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966637711] [2023-08-04 06:32:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:41,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:32:41,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:32:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:32:41,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 256 [2023-08-04 06:32:41,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 06:32:41,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:41,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 256 [2023-08-04 06:32:41,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:41,925 INFO L124 PetriNetUnfolderBase]: 723/1202 cut-off events. [2023-08-04 06:32:41,926 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 06:32:41,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2375 conditions, 1202 events. 723/1202 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5781 event pairs, 612 based on Foata normal form. 0/1130 useless extension candidates. Maximal degree in co-relation 2359. Up to 1095 conditions per place. [2023-08-04 06:32:41,932 INFO L140 encePairwiseOnDemand]: 253/256 looper letters, 26 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 06:32:41,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 139 flow [2023-08-04 06:32:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:32:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:32:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-04 06:32:41,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53515625 [2023-08-04 06:32:41,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-04 06:32:41,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-04 06:32:41,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:41,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-04 06:32:41,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 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 06:32:41,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:41,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:41,938 INFO L175 Difference]: Start difference. First operand has 36 places, 26 transitions, 69 flow. Second operand 3 states and 411 transitions. [2023-08-04 06:32:41,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 139 flow [2023-08-04 06:32:41,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 135 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:32:41,939 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 73 flow [2023-08-04 06:32:41,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:32:41,940 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-04 06:32:41,940 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 73 flow [2023-08-04 06:32:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 06:32:41,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:41,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:32:41,952 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 06:32:42,147 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 06:32:42,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:42,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1238693029, now seen corresponding path program 1 times [2023-08-04 06:32:42,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:42,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714022477] [2023-08-04 06:32:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:42,249 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 06:32:42,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714022477] [2023-08-04 06:32:42,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714022477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:32:42,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049423898] [2023-08-04 06:32:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:42,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:32:42,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:32:42,252 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 06:32:42,254 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 06:32:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:42,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:32:42,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:32:42,396 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 06:32:42,396 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:32:42,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049423898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:42,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:32:42,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:32:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384335887] [2023-08-04 06:32:42,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:32:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:42,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:32:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:32:42,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 256 [2023-08-04 06:32:42,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 06:32:42,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:42,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 256 [2023-08-04 06:32:42,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:42,653 INFO L124 PetriNetUnfolderBase]: 672/1053 cut-off events. [2023-08-04 06:32:42,653 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 06:32:42,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2175 conditions, 1053 events. 672/1053 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4617 event pairs, 486 based on Foata normal form. 0/1001 useless extension candidates. Maximal degree in co-relation 2159. Up to 864 conditions per place. [2023-08-04 06:32:42,658 INFO L140 encePairwiseOnDemand]: 253/256 looper letters, 29 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 06:32:42,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 155 flow [2023-08-04 06:32:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:32:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:32:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-04 06:32:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390625 [2023-08-04 06:32:42,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-04 06:32:42,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-04 06:32:42,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:42,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-04 06:32:42,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 06:32:42,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:42,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 256.0) internal successors, (1024), 4 states have internal predecessors, (1024), 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 06:32:42,664 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 73 flow. Second operand 3 states and 414 transitions. [2023-08-04 06:32:42,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 155 flow [2023-08-04 06:32:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:32:42,666 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 77 flow [2023-08-04 06:32:42,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-04 06:32:42,667 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-04 06:32:42,667 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 77 flow [2023-08-04 06:32:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 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 06:32:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:42,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:32:42,676 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 06:32:42,873 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 06:32:42,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:42,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:42,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1061285567, now seen corresponding path program 1 times [2023-08-04 06:32:42,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:42,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795017900] [2023-08-04 06:32:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:42,963 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 06:32:42,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795017900] [2023-08-04 06:32:42,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795017900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:32:42,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594702330] [2023-08-04 06:32:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:42,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:32:42,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:32:42,966 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 06:32:42,968 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 06:32:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:43,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:32:43,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:32:43,117 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 06:32:43,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:32:43,134 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 06:32:43,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594702330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:32:43,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:32:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:32:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706871686] [2023-08-04 06:32:43,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:32:43,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:32:43,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:32:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:32:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 256 [2023-08-04 06:32:43,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 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 06:32:43,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:43,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 256 [2023-08-04 06:32:43,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:43,181 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:32:43,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:43,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 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. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:32:43,186 INFO L140 encePairwiseOnDemand]: 253/256 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:32:43,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:32:43,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:32:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:32:43,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-08-04 06:32:43,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501953125 [2023-08-04 06:32:43,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-08-04 06:32:43,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-08-04 06:32:43,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:43,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-08-04 06:32:43,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 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 06:32:43,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 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 06:32:43,192 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 256.0) internal successors, (1280), 5 states have internal predecessors, (1280), 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 06:32:43,193 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 77 flow. Second operand 4 states and 514 transitions. [2023-08-04 06:32:43,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:32:43,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:32:43,193 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:32:43,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=256, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, 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=18, PETRI_TRANSITIONS=0} [2023-08-04 06:32:43,195 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -15 predicate places. [2023-08-04 06:32:43,195 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:32:43,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 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 06:32:43,198 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:32:43,204 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 06:32:43,404 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 06:32:43,405 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:32:43,406 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:32:43,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:32:43,448 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-04 06:32:43,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:43,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1955 event pairs, 0 based on Foata normal form. 0/413 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 06:32:43,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:32:43,451 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 06:32:43,451 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:32:43,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 06:32:43,451 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 06:32:43,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 06:32:43,469 INFO L124 PetriNetUnfolderBase]: 6/233 cut-off events. [2023-08-04 06:32:43,469 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:43,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 6/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-04 06:32:43,471 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 06:32:47,852 INFO L134 LiptonReduction]: Checked pairs total: 3371 [2023-08-04 06:32:47,852 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 06:32:47,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:32:47,854 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;@5721fff1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:32:47,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:32:47,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:32:47,858 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 06:32:47,858 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:32:47,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:47,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:32:47,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:32:47,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash -947728739, now seen corresponding path program 1 times [2023-08-04 06:32:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:47,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197951713] [2023-08-04 06:32:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:47,900 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 06:32:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197951713] [2023-08-04 06:32:47,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197951713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:47,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:32:47,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:32:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978960017] [2023-08-04 06:32:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:32:47,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:32:47,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:32:47,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 243 [2023-08-04 06:32:47,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 06:32:47,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:47,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 243 [2023-08-04 06:32:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:48,009 INFO L124 PetriNetUnfolderBase]: 266/505 cut-off events. [2023-08-04 06:32:48,009 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:32:48,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 505 events. 266/505 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2325 event pairs, 204 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 1008. Up to 450 conditions per place. [2023-08-04 06:32:48,012 INFO L140 encePairwiseOnDemand]: 240/243 looper letters, 20 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-04 06:32:48,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 115 flow [2023-08-04 06:32:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:32:48,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:32:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-04 06:32:48,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541838134430727 [2023-08-04 06:32:48,014 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-04 06:32:48,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-04 06:32:48,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:48,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-04 06:32:48,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 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 06:32:48,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 06:32:48,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 06:32:48,017 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 65 flow. Second operand 3 states and 404 transitions. [2023-08-04 06:32:48,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 115 flow [2023-08-04 06:32:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:32:48,019 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 73 flow [2023-08-04 06:32:48,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=243, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-04 06:32:48,022 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 06:32:48,022 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 73 flow [2023-08-04 06:32:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 06:32:48,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:48,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:32:48,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:32:48,023 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:32:48,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash -954460083, now seen corresponding path program 1 times [2023-08-04 06:32:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:48,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458331785] [2023-08-04 06:32:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:48,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:32:48,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:32:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:32:48,079 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:32:48,080 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:32:48,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:32:48,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:32:48,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:32:48,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:32:48,081 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 06:32:48,081 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:32:48,081 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:32:48,082 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:32:48,120 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:32:48,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 06:32:48,283 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-04 06:32:48,283 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:32:48,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9449 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-04 06:32:48,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-04 06:32:48,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 154 transitions, 332 flow [2023-08-04 06:32:48,289 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:32:48,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 154 transitions, 332 flow [2023-08-04 06:32:48,289 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 154 transitions, 332 flow [2023-08-04 06:32:48,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 154 transitions, 332 flow [2023-08-04 06:32:48,401 INFO L124 PetriNetUnfolderBase]: 66/1055 cut-off events. [2023-08-04 06:32:48,401 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:32:48,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 1055 events. 66/1055 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6572 event pairs, 0 based on Foata normal form. 0/950 useless extension candidates. Maximal degree in co-relation 787. Up to 54 conditions per place. [2023-08-04 06:32:48,420 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 06:32:55,593 INFO L134 LiptonReduction]: Checked pairs total: 13272 [2023-08-04 06:32:55,593 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 06:32:55,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:32:55,595 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;@5721fff1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:32:55,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:32:55,599 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:32:55,599 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 06:32:55,599 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:32:55,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:55,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:32:55,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:55,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash -426223983, now seen corresponding path program 1 times [2023-08-04 06:32:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:55,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615755554] [2023-08-04 06:32:55,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:55,635 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 06:32:55,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:55,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615755554] [2023-08-04 06:32:55,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615755554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:55,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:32:55,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:32:55,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544894420] [2023-08-04 06:32:55,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:55,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:32:55,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:55,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:32:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:32:55,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:32:55,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 06:32:55,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:55,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:32:55,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:33:17,137 INFO L124 PetriNetUnfolderBase]: 115988/155775 cut-off events. [2023-08-04 06:33:17,137 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2023-08-04 06:33:17,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 307760 conditions, 155775 events. 115988/155775 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 4388. Compared 1049699 event pairs, 94470 based on Foata normal form. 0/149723 useless extension candidates. Maximal degree in co-relation 88235. Up to 148266 conditions per place. [2023-08-04 06:33:18,332 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 06:33:18,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 194 flow [2023-08-04 06:33:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:33:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:33:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 06:33:18,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473684210526316 [2023-08-04 06:33:18,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 06:33:18,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 06:33:18,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:33:18,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 06:33:18,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 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 06:33:18,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:18,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:18,338 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 110 flow. Second operand 3 states and 468 transitions. [2023-08-04 06:33:18,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 194 flow [2023-08-04 06:33:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:33:18,340 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 122 flow [2023-08-04 06:33:18,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-04 06:33:18,340 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 06:33:18,341 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 122 flow [2023-08-04 06:33:18,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 06:33:18,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:33:18,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:33:18,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:33:18,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:33:18,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:33:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash -643763460, now seen corresponding path program 1 times [2023-08-04 06:33:18,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:33:18,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163327715] [2023-08-04 06:33:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:18,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:33:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:18,392 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 06:33:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:33:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163327715] [2023-08-04 06:33:18,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163327715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:33:18,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617711534] [2023-08-04 06:33:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:18,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:33:18,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:33:18,394 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 06:33:18,396 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 06:33:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:18,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:33:18,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:33:18,543 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 06:33:18,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:33:18,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617711534] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:33:18,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:33:18,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:33:18,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682237735] [2023-08-04 06:33:18,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:33:18,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:33:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:33:18,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:33:18,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:33:18,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:33:18,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 06:33:18,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:33:18,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:33:18,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:33:37,631 INFO L124 PetriNetUnfolderBase]: 112474/151468 cut-off events. [2023-08-04 06:33:37,631 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 06:33:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298301 conditions, 151468 events. 112474/151468 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4424. Compared 1028971 event pairs, 89386 based on Foata normal form. 0/146079 useless extension candidates. Maximal degree in co-relation 298264. Up to 143101 conditions per place. [2023-08-04 06:33:38,527 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 42 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 06:33:38,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 228 flow [2023-08-04 06:33:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:33:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:33:38,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-08-04 06:33:38,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532163742690058 [2023-08-04 06:33:38,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-08-04 06:33:38,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-08-04 06:33:38,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:33:38,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-08-04 06:33:38,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 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 06:33:38,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:38,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:38,532 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 122 flow. Second operand 3 states and 473 transitions. [2023-08-04 06:33:38,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 228 flow [2023-08-04 06:33:38,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 53 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:33:38,534 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 132 flow [2023-08-04 06:33:38,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 06:33:38,535 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2023-08-04 06:33:38,535 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 132 flow [2023-08-04 06:33:38,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 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 06:33:38,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:33:38,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:33:38,543 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 06:33:38,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:33:38,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:33:38,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:33:38,741 INFO L85 PathProgramCache]: Analyzing trace with hash -300477801, now seen corresponding path program 1 times [2023-08-04 06:33:38,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:33:38,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13727005] [2023-08-04 06:33:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:33:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:38,832 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 06:33:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:33:38,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13727005] [2023-08-04 06:33:38,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13727005] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:33:38,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449647126] [2023-08-04 06:33:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:33:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:33:38,835 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 06:33:38,837 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 06:33:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:38,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:33:38,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:33:38,982 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 06:33:38,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:33:38,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449647126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:33:38,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:33:38,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:33:38,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795725482] [2023-08-04 06:33:38,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:33:38,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:33:38,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:33:38,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:33:38,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:33:38,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:33:38,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 06:33:38,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:33:38,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:33:38,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:33:57,826 INFO L124 PetriNetUnfolderBase]: 110662/148366 cut-off events. [2023-08-04 06:33:57,826 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 06:33:58,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293205 conditions, 148366 events. 110662/148366 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4438. Compared 1001181 event pairs, 86158 based on Foata normal form. 0/143550 useless extension candidates. Maximal degree in co-relation 84368. Up to 135661 conditions per place. [2023-08-04 06:33:58,941 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 49 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 06:33:58,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 60 transitions, 264 flow [2023-08-04 06:33:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:33:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:33:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 479 transitions. [2023-08-04 06:33:58,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560233918128655 [2023-08-04 06:33:58,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 479 transitions. [2023-08-04 06:33:58,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 479 transitions. [2023-08-04 06:33:58,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:33:58,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 479 transitions. [2023-08-04 06:33:58,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 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 06:33:58,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:58,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:33:58,948 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 132 flow. Second operand 3 states and 479 transitions. [2023-08-04 06:33:58,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 60 transitions, 264 flow [2023-08-04 06:33:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:33:58,955 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 142 flow [2023-08-04 06:33:58,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-08-04 06:33:58,956 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2023-08-04 06:33:58,956 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 142 flow [2023-08-04 06:33:58,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 06:33:58,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:33:58,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:33:58,964 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 06:33:59,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:33:59,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:33:59,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:33:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1918726449, now seen corresponding path program 1 times [2023-08-04 06:33:59,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:33:59,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597714950] [2023-08-04 06:33:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:59,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:33:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:59,260 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 06:33:59,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:33:59,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597714950] [2023-08-04 06:33:59,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597714950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:33:59,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598607938] [2023-08-04 06:33:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:33:59,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:33:59,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:33:59,528 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 06:33:59,529 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 06:33:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:33:59,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:33:59,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:33:59,776 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 06:33:59,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:33:59,794 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 06:33:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598607938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:33:59,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:33:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:33:59,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082165198] [2023-08-04 06:33:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:33:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:33:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:33:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:33:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:33:59,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-04 06:33:59,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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 06:33:59,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:33:59,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-04 06:33:59,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:14,795 INFO L124 PetriNetUnfolderBase]: 86758/114284 cut-off events. [2023-08-04 06:34:14,796 INFO L125 PetriNetUnfolderBase]: For 9681/9681 co-relation queries the response was YES. [2023-08-04 06:34:15,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234758 conditions, 114284 events. 86758/114284 cut-off events. For 9681/9681 co-relation queries the response was YES. Maximal size of possible extension queue 3467. Compared 714950 event pairs, 56706 based on Foata normal form. 3/113521 useless extension candidates. Maximal degree in co-relation 83242. Up to 109264 conditions per place. [2023-08-04 06:34:15,409 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 41 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2023-08-04 06:34:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 248 flow [2023-08-04 06:34:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:15,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-04 06:34:15,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2023-08-04 06:34:15,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-04 06:34:15,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-04 06:34:15,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:15,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-04 06:34:15,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 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 06:34:15,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:15,416 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:15,416 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 142 flow. Second operand 4 states and 612 transitions. [2023-08-04 06:34:15,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 248 flow [2023-08-04 06:34:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:34:15,422 INFO L231 Difference]: Finished difference. Result has 67 places, 46 transitions, 154 flow [2023-08-04 06:34:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=67, PETRI_TRANSITIONS=46} [2023-08-04 06:34:15,423 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2023-08-04 06:34:15,423 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 46 transitions, 154 flow [2023-08-04 06:34:15,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 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 06:34:15,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:15,424 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:15,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 06:34:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:15,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:15,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:15,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2085510405, now seen corresponding path program 1 times [2023-08-04 06:34:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:15,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906112677] [2023-08-04 06:34:15,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:15,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:15,698 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 06:34:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906112677] [2023-08-04 06:34:15,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906112677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889582638] [2023-08-04 06:34:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:15,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:15,701 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 06:34:15,703 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 06:34:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:15,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:15,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:15,877 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 06:34:15,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:15,894 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 06:34:15,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889582638] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:15,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:15,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:34:15,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719543190] [2023-08-04 06:34:15,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:15,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:34:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:34:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:15,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-04 06:34:15,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 46 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 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 06:34:15,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:15,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-04 06:34:15,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:27,795 INFO L124 PetriNetUnfolderBase]: 72304/94486 cut-off events. [2023-08-04 06:34:27,795 INFO L125 PetriNetUnfolderBase]: For 6957/6957 co-relation queries the response was YES. [2023-08-04 06:34:28,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193406 conditions, 94486 events. 72304/94486 cut-off events. For 6957/6957 co-relation queries the response was YES. Maximal size of possible extension queue 3145. Compared 575982 event pairs, 44914 based on Foata normal form. 36/93936 useless extension candidates. Maximal degree in co-relation 68476. Up to 89116 conditions per place. [2023-08-04 06:34:28,312 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 06:34:28,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 304 flow [2023-08-04 06:34:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:28,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-08-04 06:34:28,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464912280701755 [2023-08-04 06:34:28,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-08-04 06:34:28,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-08-04 06:34:28,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:28,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-08-04 06:34:28,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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 06:34:28,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:28,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:28,319 INFO L175 Difference]: Start difference. First operand has 67 places, 46 transitions, 154 flow. Second operand 4 states and 623 transitions. [2023-08-04 06:34:28,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 304 flow [2023-08-04 06:34:28,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 65 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:34:28,326 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 161 flow [2023-08-04 06:34:28,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-08-04 06:34:28,327 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2023-08-04 06:34:28,327 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 161 flow [2023-08-04 06:34:28,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 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 06:34:28,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:28,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:28,335 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 06:34:28,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:28,534 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:28,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:28,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1502262615, now seen corresponding path program 1 times [2023-08-04 06:34:28,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:28,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080676346] [2023-08-04 06:34:28,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:28,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:28,606 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 06:34:28,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080676346] [2023-08-04 06:34:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080676346] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323184847] [2023-08-04 06:34:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:28,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:28,608 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 06:34:28,633 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 06:34:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:28,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:28,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:28,796 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 06:34:28,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:28,811 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 06:34:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323184847] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:28,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:34:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269452604] [2023-08-04 06:34:28,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:28,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:34:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:34:28,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:28,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 285 [2023-08-04 06:34:28,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 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 06:34:28,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:28,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 285 [2023-08-04 06:34:28,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:39,424 INFO L124 PetriNetUnfolderBase]: 65704/84151 cut-off events. [2023-08-04 06:34:39,424 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 06:34:39,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174535 conditions, 84151 events. 65704/84151 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 2825. Compared 480555 event pairs, 28792 based on Foata normal form. 576/84717 useless extension candidates. Maximal degree in co-relation 61770. Up to 50548 conditions per place. [2023-08-04 06:34:39,856 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 64 selfloop transitions, 3 changer transitions 1/77 dead transitions. [2023-08-04 06:34:39,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 359 flow [2023-08-04 06:34:39,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 635 transitions. [2023-08-04 06:34:39,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2023-08-04 06:34:39,859 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 635 transitions. [2023-08-04 06:34:39,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 635 transitions. [2023-08-04 06:34:39,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:39,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 635 transitions. [2023-08-04 06:34:39,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.75) internal successors, (635), 4 states have internal predecessors, (635), 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 06:34:39,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:39,863 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 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 06:34:39,863 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 161 flow. Second operand 4 states and 635 transitions. [2023-08-04 06:34:39,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 359 flow [2023-08-04 06:34:39,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 352 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:34:39,868 INFO L231 Difference]: Finished difference. Result has 71 places, 46 transitions, 168 flow [2023-08-04 06:34:39,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=71, PETRI_TRANSITIONS=46} [2023-08-04 06:34:39,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2023-08-04 06:34:39,869 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 46 transitions, 168 flow [2023-08-04 06:34:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 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 06:34:39,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:39,869 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:39,878 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 06:34:40,075 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,SelfDestructingSolverStorable11 [2023-08-04 06:34:40,075 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:40,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -478770032, now seen corresponding path program 1 times [2023-08-04 06:34:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:40,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105236432] [2023-08-04 06:34:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:34:40,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:40,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105236432] [2023-08-04 06:34:40,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105236432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:40,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:40,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:34:40,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364194147] [2023-08-04 06:34:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:40,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:40,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:34:40,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 285 [2023-08-04 06:34:40,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 46 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 06:34:40,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:40,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 285 [2023-08-04 06:34:40,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:49,419 INFO L124 PetriNetUnfolderBase]: 55024/72607 cut-off events. [2023-08-04 06:34:49,419 INFO L125 PetriNetUnfolderBase]: For 27628/27628 co-relation queries the response was YES. [2023-08-04 06:34:49,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158062 conditions, 72607 events. 55024/72607 cut-off events. For 27628/27628 co-relation queries the response was YES. Maximal size of possible extension queue 2473. Compared 437591 event pairs, 10816 based on Foata normal form. 144/72741 useless extension candidates. Maximal degree in co-relation 55735. Up to 62497 conditions per place. [2023-08-04 06:34:49,807 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 52 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-04 06:34:49,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 336 flow [2023-08-04 06:34:49,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:49,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:49,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-04 06:34:49,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5730994152046783 [2023-08-04 06:34:49,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-04 06:34:49,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-04 06:34:49,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:49,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-04 06:34:49,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 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 06:34:49,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:34:49,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:34:49,812 INFO L175 Difference]: Start difference. First operand has 71 places, 46 transitions, 168 flow. Second operand 3 states and 490 transitions. [2023-08-04 06:34:49,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 336 flow [2023-08-04 06:34:49,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 324 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:34:49,848 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 180 flow [2023-08-04 06:34:49,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-08-04 06:34:49,849 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2023-08-04 06:34:49,849 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 180 flow [2023-08-04 06:34:49,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 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 06:34:49,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:49,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:49,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:34:49,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:49,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1956969835, now seen corresponding path program 1 times [2023-08-04 06:34:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:49,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422123535] [2023-08-04 06:34:49,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:49,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:34:50,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:50,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422123535] [2023-08-04 06:34:50,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422123535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:50,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:50,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:34:50,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258158634] [2023-08-04 06:34:50,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:50,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:50,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:50,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:50,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:34:50,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 285 [2023-08-04 06:34:50,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 06:34:50,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:50,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 285 [2023-08-04 06:34:50,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:59,132 INFO L124 PetriNetUnfolderBase]: 53832/72871 cut-off events. [2023-08-04 06:34:59,132 INFO L125 PetriNetUnfolderBase]: For 25284/25284 co-relation queries the response was YES. [2023-08-04 06:34:59,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161455 conditions, 72871 events. 53832/72871 cut-off events. For 25284/25284 co-relation queries the response was YES. Maximal size of possible extension queue 2544. Compared 484869 event pairs, 7674 based on Foata normal form. 240/72855 useless extension candidates. Maximal degree in co-relation 161378. Up to 62773 conditions per place. [2023-08-04 06:34:59,588 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 70 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 06:34:59,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 467 flow [2023-08-04 06:34:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:59,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-04 06:34:59,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906432748538012 [2023-08-04 06:34:59,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-04 06:34:59,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-04 06:34:59,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:59,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-04 06:34:59,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 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 06:34:59,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:34:59,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 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 06:34:59,594 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 180 flow. Second operand 3 states and 505 transitions. [2023-08-04 06:34:59,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 467 flow [2023-08-04 06:34:59,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 462 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:34:59,604 INFO L231 Difference]: Finished difference. Result has 73 places, 50 transitions, 196 flow [2023-08-04 06:34:59,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=73, PETRI_TRANSITIONS=50} [2023-08-04 06:34:59,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2023-08-04 06:34:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 50 transitions, 196 flow [2023-08-04 06:34:59,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 06:34:59,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:59,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:59,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 06:34:59,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:59,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:59,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1586412263, now seen corresponding path program 1 times [2023-08-04 06:34:59,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:59,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339067983] [2023-08-04 06:34:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:59,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:35:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:35:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:35:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339067983] [2023-08-04 06:35:01,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339067983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:35:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039404096] [2023-08-04 06:35:01,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:35:01,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:35:01,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:35:01,343 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 06:35:01,349 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 06:35:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:35:01,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-04 06:35:01,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:35:01,707 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-08-04 06:35:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:35:01,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:35:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 06:35:02,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039404096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:35:02,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:35:02,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-08-04 06:35:02,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200407417] [2023-08-04 06:35:02,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:35:02,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 06:35:02,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:35:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 06:35:02,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-04 06:35:02,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 285 [2023-08-04 06:35:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 50 transitions, 196 flow. Second operand has 13 states, 13 states have (on average 126.84615384615384) internal successors, (1649), 13 states have internal predecessors, (1649), 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 06:35:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:35:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 285 [2023-08-04 06:35:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand