/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:01:39,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:01:39,502 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:01:39,506 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:01:39,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:01:39,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:01:39,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:01:39,534 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:01:39,535 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:01:39,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:01:39,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:01:39,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:01:39,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:01:39,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:01:39,541 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:01:39,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:01:39,541 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:01:39,542 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:01:39,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:01:39,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:01:39,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:01:39,543 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:01:39,543 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:01:39,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:01:39,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:01:39,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:01:39,545 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:01:39,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:01:39,546 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:01:39,546 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:01:39,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:01:39,547 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:01:39,547 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:01:39,548 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:01:39,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:01:39,549 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:01:39,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:01:39,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:01:39,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:01:39,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:01:39,834 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:01:39,834 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:01:39,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:01:40,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:01:41,246 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:01:41,249 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:01:41,261 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55727ce9a/f06d403902c64dbc8ed0818c2389f631/FLAGb544a3c2e [2023-08-04 01:01:41,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55727ce9a/f06d403902c64dbc8ed0818c2389f631 [2023-08-04 01:01:41,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:01:41,276 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:01:41,276 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:01:41,277 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:01:41,284 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:01:41,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,285 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19616b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41, skipping insertion in model container [2023-08-04 01:01:41,285 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,338 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:01:41,519 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_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 01:01:41,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:01:41,713 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:01:41,724 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_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 01:01:41,744 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:01:41,746 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:01:41,761 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:01:41,789 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:01:41,789 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:01:41,795 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:01:41,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41 WrapperNode [2023-08-04 01:01:41,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:01:41,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:01:41,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:01:41,798 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:01:41,804 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,853 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 115 [2023-08-04 01:01:41,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:01:41,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:01:41,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:01:41,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:01:41,862 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,862 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,865 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,871 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,875 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,876 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:01:41,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:01:41,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:01:41,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:01:41,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (1/1) ... [2023-08-04 01:01:41,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:01:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:01:41,911 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 01:01:41,924 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 01:01:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:01:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:01:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:01:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:01:41,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:01:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:01:41,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:01:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:01:41,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:01:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 01:01:41,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 01:01:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 01:01:41,948 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 01:01:41,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:01:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:01:41,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:01:41,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:01:41,950 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 01:01:42,057 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:01:42,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:01:42,225 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:01:42,230 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:01:42,231 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 01:01:42,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:01:42 BoogieIcfgContainer [2023-08-04 01:01:42,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:01:42,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:01:42,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:01:42,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:01:42,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:01:41" (1/3) ... [2023-08-04 01:01:42,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ce882d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:01:42, skipping insertion in model container [2023-08-04 01:01:42,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:01:41" (2/3) ... [2023-08-04 01:01:42,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ce882d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:01:42, skipping insertion in model container [2023-08-04 01:01:42,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:01:42" (3/3) ... [2023-08-04 01:01:42,241 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe027_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:01:42,248 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:01:42,256 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:01:42,256 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:01:42,256 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:01:42,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:01:42,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 128 transitions, 276 flow [2023-08-04 01:01:42,567 INFO L124 PetriNetUnfolderBase]: 62/861 cut-off events. [2023-08-04 01:01:42,568 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:42,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 861 events. 62/861 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5285 event pairs, 0 based on Foata normal form. 0/753 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2023-08-04 01:01:42,575 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 128 transitions, 276 flow [2023-08-04 01:01:42,580 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 98 transitions, 216 flow [2023-08-04 01:01:42,583 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:01:42,590 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 98 transitions, 216 flow [2023-08-04 01:01:42,592 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 98 transitions, 216 flow [2023-08-04 01:01:42,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 98 transitions, 216 flow [2023-08-04 01:01:42,635 INFO L124 PetriNetUnfolderBase]: 14/381 cut-off events. [2023-08-04 01:01:42,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:42,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 381 events. 14/381 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1733 event pairs, 0 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 274. Up to 16 conditions per place. [2023-08-04 01:01:42,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 1822 [2023-08-04 01:01:44,760 INFO L134 LiptonReduction]: Checked pairs total: 2830 [2023-08-04 01:01:44,761 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-08-04 01:01:44,771 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:01:44,776 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;@7e832841, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:01:44,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:01:44,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:01:44,780 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 01:01:44,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:01:44,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:01:44,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:01:44,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:01:44,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:01:44,786 INFO L85 PathProgramCache]: Analyzing trace with hash -183926474, now seen corresponding path program 1 times [2023-08-04 01:01:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:01:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130761067] [2023-08-04 01:01:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:01:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:01:44,879 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:01:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:01:44,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:01:44,914 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:01:44,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 01:01:44,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 01:01:44,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 01:01:44,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 01:01:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:01:44,917 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:01:44,919 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:01:44,920 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:01:44,920 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:01:44,944 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:01:44,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 154 transitions, 356 flow [2023-08-04 01:01:45,456 INFO L124 PetriNetUnfolderBase]: 282/4026 cut-off events. [2023-08-04 01:01:45,457 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:01:45,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 4026 events. 282/4026 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38513 event pairs, 0 based on Foata normal form. 0/3543 useless extension candidates. Maximal degree in co-relation 2929. Up to 162 conditions per place. [2023-08-04 01:01:45,478 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 154 transitions, 356 flow [2023-08-04 01:01:45,483 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 124 transitions, 296 flow [2023-08-04 01:01:45,484 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:01:45,485 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 124 transitions, 296 flow [2023-08-04 01:01:45,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 124 transitions, 296 flow [2023-08-04 01:01:45,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 124 transitions, 296 flow [2023-08-04 01:01:45,640 INFO L124 PetriNetUnfolderBase]: 39/1596 cut-off events. [2023-08-04 01:01:45,640 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:01:45,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1885 conditions, 1596 events. 39/1596 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12235 event pairs, 0 based on Foata normal form. 0/1518 useless extension candidates. Maximal degree in co-relation 1309. Up to 81 conditions per place. [2023-08-04 01:01:45,681 INFO L119 LiptonReduction]: Number of co-enabled transitions 4792 [2023-08-04 01:01:47,674 INFO L134 LiptonReduction]: Checked pairs total: 10007 [2023-08-04 01:01:47,675 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-04 01:01:47,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:01:47,678 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;@7e832841, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:01:47,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:01:47,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:01:47,685 INFO L124 PetriNetUnfolderBase]: 0/82 cut-off events. [2023-08-04 01:01:47,685 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 01:01:47,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:01:47,685 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:01:47,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:01:47,686 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:01:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash 500657149, now seen corresponding path program 1 times [2023-08-04 01:01:47,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:01:47,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720352153] [2023-08-04 01:01:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:47,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:01:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:01:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:01:47,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:01:47,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720352153] [2023-08-04 01:01:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720352153] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:01:47,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252781221] [2023-08-04 01:01:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:01:47,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:01:47,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:01:47,881 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 01:01:47,898 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 01:01:47,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:01:47,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:01:47,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:01:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:01:48,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:01:48,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252781221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:01:48,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:01:48,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:01:48,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297605756] [2023-08-04 01:01:48,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:01:48,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:01:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:01:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:01:48,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:01:48,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:01:48,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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 01:01:48,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:01:48,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:01:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:02:09,935 INFO L124 PetriNetUnfolderBase]: 241964/317817 cut-off events. [2023-08-04 01:02:09,936 INFO L125 PetriNetUnfolderBase]: For 24573/24573 co-relation queries the response was YES. [2023-08-04 01:02:11,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652287 conditions, 317817 events. 241964/317817 cut-off events. For 24573/24573 co-relation queries the response was YES. Maximal size of possible extension queue 7689. Compared 2182831 event pairs, 175344 based on Foata normal form. 0/310116 useless extension candidates. Maximal degree in co-relation 206468. Up to 303804 conditions per place. [2023-08-04 01:02:12,592 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 40 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2023-08-04 01:02:12,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 246 flow [2023-08-04 01:02:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:02:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:02:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 716 transitions. [2023-08-04 01:02:12,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042194092827005 [2023-08-04 01:02:12,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 716 transitions. [2023-08-04 01:02:12,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 716 transitions. [2023-08-04 01:02:12,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:02:12,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 716 transitions. [2023-08-04 01:02:12,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 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 01:02:12,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:02:12,622 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:02:12,623 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 142 flow. Second operand 5 states and 716 transitions. [2023-08-04 01:02:12,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 246 flow [2023-08-04 01:02:12,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 239 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 01:02:12,671 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 152 flow [2023-08-04 01:02:12,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=129, 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=5, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-04 01:02:12,676 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-04 01:02:12,676 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 152 flow [2023-08-04 01:02:12,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 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 01:02:12,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:02:12,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:02:12,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:02:12,882 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 01:02:12,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:02:12,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:02:12,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1650155906, now seen corresponding path program 1 times [2023-08-04 01:02:12,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:02:12,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348326063] [2023-08-04 01:02:12,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:02:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:02:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:02:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:02:12,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:02:12,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348326063] [2023-08-04 01:02:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348326063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:02:12,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:02:12,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:02:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702802687] [2023-08-04 01:02:12,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:02:12,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:02:12,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:02:12,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:02:12,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:02:12,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 237 [2023-08-04 01:02:12,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 01:02:12,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:02:12,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 237 [2023-08-04 01:02:12,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:02:30,805 INFO L124 PetriNetUnfolderBase]: 228476/298500 cut-off events. [2023-08-04 01:02:30,806 INFO L125 PetriNetUnfolderBase]: For 20664/20664 co-relation queries the response was YES. [2023-08-04 01:02:31,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610348 conditions, 298500 events. 228476/298500 cut-off events. For 20664/20664 co-relation queries the response was YES. Maximal size of possible extension queue 7364. Compared 1995270 event pairs, 190404 based on Foata normal form. 1/291396 useless extension candidates. Maximal degree in co-relation 194033. Up to 285585 conditions per place. [2023-08-04 01:02:33,233 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 38 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 01:02:33,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 51 transitions, 235 flow [2023-08-04 01:02:33,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:02:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:02:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-04 01:02:33,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258790436005626 [2023-08-04 01:02:33,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-04 01:02:33,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-04 01:02:33,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:02:33,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-04 01:02:33,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 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 01:02:33,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:02:33,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:02:33,239 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 152 flow. Second operand 3 states and 445 transitions. [2023-08-04 01:02:33,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 51 transitions, 235 flow [2023-08-04 01:02:33,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 51 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:02:33,241 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 150 flow [2023-08-04 01:02:33,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 01:02:33,242 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2023-08-04 01:02:33,242 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 150 flow [2023-08-04 01:02:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 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 01:02:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:02:33,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:02:33,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:02:33,243 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:02:33,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:02:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -46754871, now seen corresponding path program 1 times [2023-08-04 01:02:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:02:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105811339] [2023-08-04 01:02:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:02:33,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:02:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:02:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:02:33,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:02:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105811339] [2023-08-04 01:02:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105811339] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:02:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118743021] [2023-08-04 01:02:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:02:33,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:02:33,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:02:33,295 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 01:02:33,328 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 01:02:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:02:33,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:02:33,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:02:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:02:33,431 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:02:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118743021] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:02:33,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:02:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:02:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377235069] [2023-08-04 01:02:33,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:02:33,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:02:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:02:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:02:33,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:02:33,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 237 [2023-08-04 01:02:33,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 01:02:33,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:02:33,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 237 [2023-08-04 01:02:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:02:50,737 INFO L124 PetriNetUnfolderBase]: 215666/286232 cut-off events. [2023-08-04 01:02:50,737 INFO L125 PetriNetUnfolderBase]: For 18304/18304 co-relation queries the response was YES. [2023-08-04 01:02:51,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580510 conditions, 286232 events. 215666/286232 cut-off events. For 18304/18304 co-relation queries the response was YES. Maximal size of possible extension queue 7627. Compared 1982209 event pairs, 180484 based on Foata normal form. 0/280927 useless extension candidates. Maximal degree in co-relation 580470. Up to 268294 conditions per place. [2023-08-04 01:02:53,098 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 42 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-04 01:02:53,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 56 transitions, 256 flow [2023-08-04 01:02:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:02:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:02:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 01:02:53,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6315049226441631 [2023-08-04 01:02:53,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 01:02:53,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 01:02:53,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:02:53,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 01:02:53,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 01:02:53,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:02:53,103 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:02:53,103 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 150 flow. Second operand 3 states and 449 transitions. [2023-08-04 01:02:53,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 56 transitions, 256 flow [2023-08-04 01:02:53,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:02:53,106 INFO L231 Difference]: Finished difference. Result has 69 places, 49 transitions, 161 flow [2023-08-04 01:02:53,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2023-08-04 01:02:53,107 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2023-08-04 01:02:53,107 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 161 flow [2023-08-04 01:02:53,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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 01:02:53,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:02:53,107 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:02:53,113 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 01:02:53,313 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,SelfDestructingSolverStorable3 [2023-08-04 01:02:53,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:02:53,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:02:53,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1557724953, now seen corresponding path program 1 times [2023-08-04 01:02:53,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:02:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971994264] [2023-08-04 01:02:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:02:53,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:02:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:02:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:02:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:02:53,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971994264] [2023-08-04 01:02:53,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971994264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:02:53,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828706019] [2023-08-04 01:02:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:02:53,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:02:53,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:02:53,374 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 01:02:53,376 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 01:02:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:02:53,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:02:53,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:02:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:02:53,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:02:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:02:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828706019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:02:53,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:02:53,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:02:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007039717] [2023-08-04 01:02:53,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:02:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:02:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:02:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:02:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:02:53,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:02:53,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:02:53,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:02:53,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:02:53,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:03:07,700 INFO L124 PetriNetUnfolderBase]: 168346/221519 cut-off events. [2023-08-04 01:03:07,701 INFO L125 PetriNetUnfolderBase]: For 13764/13764 co-relation queries the response was YES. [2023-08-04 01:03:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449091 conditions, 221519 events. 168346/221519 cut-off events. For 13764/13764 co-relation queries the response was YES. Maximal size of possible extension queue 6049. Compared 1467574 event pairs, 115596 based on Foata normal form. 3/217705 useless extension candidates. Maximal degree in co-relation 158467. Up to 207892 conditions per place. [2023-08-04 01:03:09,346 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 41 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-04 01:03:09,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 55 transitions, 257 flow [2023-08-04 01:03:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:03:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:03:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 580 transitions. [2023-08-04 01:03:09,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118143459915611 [2023-08-04 01:03:09,348 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 580 transitions. [2023-08-04 01:03:09,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 580 transitions. [2023-08-04 01:03:09,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:03:09,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 580 transitions. [2023-08-04 01:03:09,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:09,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:09,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:09,353 INFO L175 Difference]: Start difference. First operand has 69 places, 49 transitions, 161 flow. Second operand 4 states and 580 transitions. [2023-08-04 01:03:09,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 55 transitions, 257 flow [2023-08-04 01:03:09,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:03:09,355 INFO L231 Difference]: Finished difference. Result has 71 places, 48 transitions, 157 flow [2023-08-04 01:03:09,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=71, PETRI_TRANSITIONS=48} [2023-08-04 01:03:09,356 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 7 predicate places. [2023-08-04 01:03:09,356 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 48 transitions, 157 flow [2023-08-04 01:03:09,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:03:09,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:03:09,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:03:09,366 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 01:03:09,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:09,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:03:09,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:03:09,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1182854303, now seen corresponding path program 1 times [2023-08-04 01:03:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:03:09,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68978289] [2023-08-04 01:03:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:09,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:03:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:03:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:03:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68978289] [2023-08-04 01:03:09,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68978289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:03:09,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609054982] [2023-08-04 01:03:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:09,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:09,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:03:09,665 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 01:03:09,669 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 01:03:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:09,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:03:09,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:03:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:03:09,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:03:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609054982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:03:09,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:03:09,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:03:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729837327] [2023-08-04 01:03:09,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:03:09,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:03:09,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:03:09,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:03:09,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:03:09,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:03:09,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 48 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:03:09,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:03:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:03:09,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:03:22,682 INFO L124 PetriNetUnfolderBase]: 168130/221281 cut-off events. [2023-08-04 01:03:22,683 INFO L125 PetriNetUnfolderBase]: For 13396/13396 co-relation queries the response was YES. [2023-08-04 01:03:23,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448515 conditions, 221281 events. 168130/221281 cut-off events. For 13396/13396 co-relation queries the response was YES. Maximal size of possible extension queue 6028. Compared 1467213 event pairs, 69574 based on Foata normal form. 81/217572 useless extension candidates. Maximal degree in co-relation 158255. Up to 207063 conditions per place. [2023-08-04 01:03:24,575 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 53 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-04 01:03:24,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 309 flow [2023-08-04 01:03:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:03:24,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:03:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-08-04 01:03:24,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6135021097046414 [2023-08-04 01:03:24,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-08-04 01:03:24,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-08-04 01:03:24,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:03:24,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-08-04 01:03:24,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 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 01:03:24,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:03:24,583 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:03:24,583 INFO L175 Difference]: Start difference. First operand has 71 places, 48 transitions, 157 flow. Second operand 5 states and 727 transitions. [2023-08-04 01:03:24,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 309 flow [2023-08-04 01:03:24,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:03:24,586 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 167 flow [2023-08-04 01:03:24,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2023-08-04 01:03:24,587 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2023-08-04 01:03:24,587 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 167 flow [2023-08-04 01:03:24,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 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 01:03:24,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:03:24,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:03:24,595 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 01:03:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:24,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:03:24,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:03:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1039020191, now seen corresponding path program 1 times [2023-08-04 01:03:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:03:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372499769] [2023-08-04 01:03:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:03:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:03:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:03:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372499769] [2023-08-04 01:03:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372499769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:03:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108401694] [2023-08-04 01:03:24,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:24,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:03:24,883 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 01:03:24,889 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 01:03:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:24,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:03:24,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:03:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:03:24,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:03:24,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108401694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:03:24,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:03:24,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 01:03:24,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928099569] [2023-08-04 01:03:24,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:03:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:03:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:03:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:03:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:03:25,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 237 [2023-08-04 01:03:25,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 01:03:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:03:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 237 [2023-08-04 01:03:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:03:37,648 INFO L124 PetriNetUnfolderBase]: 159220/207295 cut-off events. [2023-08-04 01:03:37,648 INFO L125 PetriNetUnfolderBase]: For 12367/12367 co-relation queries the response was YES. [2023-08-04 01:03:38,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423708 conditions, 207295 events. 159220/207295 cut-off events. For 12367/12367 co-relation queries the response was YES. Maximal size of possible extension queue 5906. Compared 1339470 event pairs, 133894 based on Foata normal form. 0/204909 useless extension candidates. Maximal degree in co-relation 149387. Up to 194125 conditions per place. [2023-08-04 01:03:39,134 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 01:03:39,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 60 transitions, 291 flow [2023-08-04 01:03:39,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:03:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:03:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-04 01:03:39,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-08-04 01:03:39,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-04 01:03:39,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-04 01:03:39,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:03:39,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-04 01:03:39,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 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 01:03:39,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:39,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:39,140 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 167 flow. Second operand 3 states and 453 transitions. [2023-08-04 01:03:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 60 transitions, 291 flow [2023-08-04 01:03:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 60 transitions, 284 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:03:39,143 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 175 flow [2023-08-04 01:03:39,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2023-08-04 01:03:39,144 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 9 predicate places. [2023-08-04 01:03:39,144 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 175 flow [2023-08-04 01:03:39,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 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 01:03:39,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:03:39,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:03:39,150 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 01:03:39,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:39,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:03:39,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:03:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1760586433, now seen corresponding path program 1 times [2023-08-04 01:03:39,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:03:39,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372246458] [2023-08-04 01:03:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:39,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:03:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:03:39,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:03:39,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372246458] [2023-08-04 01:03:39,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372246458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:03:39,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698270804] [2023-08-04 01:03:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:39,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:03:39,418 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 01:03:39,421 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 01:03:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:39,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:03:39,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:03:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:03:39,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:03:39,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:03:39,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698270804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:03:39,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:03:39,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:03:39,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479319705] [2023-08-04 01:03:39,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:03:39,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:03:39,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:03:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:03:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:03:39,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:03:39,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:03:39,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:03:39,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:03:39,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:03:49,318 INFO L124 PetriNetUnfolderBase]: 124120/160423 cut-off events. [2023-08-04 01:03:49,318 INFO L125 PetriNetUnfolderBase]: For 11149/11149 co-relation queries the response was YES. [2023-08-04 01:03:50,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329794 conditions, 160423 events. 124120/160423 cut-off events. For 11149/11149 co-relation queries the response was YES. Maximal size of possible extension queue 4997. Compared 985776 event pairs, 87178 based on Foata normal form. 27/159630 useless extension candidates. Maximal degree in co-relation 116054. Up to 151279 conditions per place. [2023-08-04 01:03:50,512 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 50 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-04 01:03:50,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 304 flow [2023-08-04 01:03:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:03:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:03:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 588 transitions. [2023-08-04 01:03:50,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2023-08-04 01:03:50,514 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 588 transitions. [2023-08-04 01:03:50,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 588 transitions. [2023-08-04 01:03:50,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:03:50,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 588 transitions. [2023-08-04 01:03:50,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 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 01:03:50,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:50,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:03:50,518 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 175 flow. Second operand 4 states and 588 transitions. [2023-08-04 01:03:50,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 304 flow [2023-08-04 01:03:50,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:03:50,524 INFO L231 Difference]: Finished difference. Result has 75 places, 48 transitions, 170 flow [2023-08-04 01:03:50,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=75, PETRI_TRANSITIONS=48} [2023-08-04 01:03:50,525 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 11 predicate places. [2023-08-04 01:03:50,525 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 48 transitions, 170 flow [2023-08-04 01:03:50,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:03:50,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:03:50,525 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:03:50,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 01:03:50,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:50,731 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:03:50,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:03:50,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1856485040, now seen corresponding path program 1 times [2023-08-04 01:03:50,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:03:50,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379171504] [2023-08-04 01:03:50,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:50,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:03:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:03:50,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:03:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379171504] [2023-08-04 01:03:50,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379171504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:03:50,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764232615] [2023-08-04 01:03:50,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:03:50,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:03:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:03:50,805 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 01:03:50,807 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 01:03:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:03:50,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:03:50,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:03:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:03:50,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:03:50,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764232615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:03:50,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:03:50,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:03:50,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674189587] [2023-08-04 01:03:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:03:50,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:03:50,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:03:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:03:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:03:50,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:03:50,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 48 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:03:50,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:03:50,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:03:50,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:04:00,159 INFO L124 PetriNetUnfolderBase]: 121204/155644 cut-off events. [2023-08-04 01:04:00,159 INFO L125 PetriNetUnfolderBase]: For 9127/9127 co-relation queries the response was YES. [2023-08-04 01:04:01,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321001 conditions, 155644 events. 121204/155644 cut-off events. For 9127/9127 co-relation queries the response was YES. Maximal size of possible extension queue 4956. Compared 938365 event pairs, 20008 based on Foata normal form. 729/156282 useless extension candidates. Maximal degree in co-relation 112961. Up to 140535 conditions per place. [2023-08-04 01:04:01,613 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 66 selfloop transitions, 4 changer transitions 0/79 dead transitions. [2023-08-04 01:04:01,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 372 flow [2023-08-04 01:04:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:04:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:04:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 739 transitions. [2023-08-04 01:04:01,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236286919831223 [2023-08-04 01:04:01,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 739 transitions. [2023-08-04 01:04:01,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 739 transitions. [2023-08-04 01:04:01,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:04:01,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 739 transitions. [2023-08-04 01:04:01,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.8) internal successors, (739), 5 states have internal predecessors, (739), 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 01:04:01,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:04:01,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 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 01:04:01,619 INFO L175 Difference]: Start difference. First operand has 75 places, 48 transitions, 170 flow. Second operand 5 states and 739 transitions. [2023-08-04 01:04:01,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 372 flow [2023-08-04 01:04:01,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 79 transitions, 365 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:04:01,637 INFO L231 Difference]: Finished difference. Result has 76 places, 48 transitions, 180 flow [2023-08-04 01:04:01,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=76, PETRI_TRANSITIONS=48} [2023-08-04 01:04:01,638 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2023-08-04 01:04:01,638 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 48 transitions, 180 flow [2023-08-04 01:04:01,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 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 01:04:01,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:01,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:04:01,648 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 01:04:01,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:04:01,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:04:01,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1629707039, now seen corresponding path program 1 times [2023-08-04 01:04:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:01,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490160928] [2023-08-04 01:04:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:04:01,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:04:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490160928] [2023-08-04 01:04:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490160928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:04:01,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169320542] [2023-08-04 01:04:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:01,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:04:01,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:04:01,904 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 01:04:01,912 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 01:04:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:02,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:04:02,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:04:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:04:02,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:04:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:04:02,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169320542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:04:02,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:04:02,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:04:02,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101232672] [2023-08-04 01:04:02,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:04:02,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:04:02,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:04:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:04:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:04:02,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 237 [2023-08-04 01:04:02,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 48 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 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 01:04:02,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:04:02,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 237 [2023-08-04 01:04:02,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:04:10,030 INFO L124 PetriNetUnfolderBase]: 96094/122758 cut-off events. [2023-08-04 01:04:10,031 INFO L125 PetriNetUnfolderBase]: For 11968/11968 co-relation queries the response was YES. [2023-08-04 01:04:10,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256004 conditions, 122758 events. 96094/122758 cut-off events. For 11968/11968 co-relation queries the response was YES. Maximal size of possible extension queue 4499. Compared 717283 event pairs, 65692 based on Foata normal form. 243/122910 useless extension candidates. Maximal degree in co-relation 89945. Up to 110209 conditions per place. [2023-08-04 01:04:11,258 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 58 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-08-04 01:04:11,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 342 flow [2023-08-04 01:04:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:04:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:04:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2023-08-04 01:04:11,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6286919831223629 [2023-08-04 01:04:11,261 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2023-08-04 01:04:11,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2023-08-04 01:04:11,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:04:11,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2023-08-04 01:04:11,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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 01:04:11,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:11,264 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:11,264 INFO L175 Difference]: Start difference. First operand has 76 places, 48 transitions, 180 flow. Second operand 4 states and 596 transitions. [2023-08-04 01:04:11,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 342 flow [2023-08-04 01:04:11,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 337 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:04:11,275 INFO L231 Difference]: Finished difference. Result has 77 places, 47 transitions, 173 flow [2023-08-04 01:04:11,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=77, PETRI_TRANSITIONS=47} [2023-08-04 01:04:11,276 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 13 predicate places. [2023-08-04 01:04:11,277 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 47 transitions, 173 flow [2023-08-04 01:04:11,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 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 01:04:11,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:11,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 01:04:11,286 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 01:04:11,482 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,SelfDestructingSolverStorable9 [2023-08-04 01:04:11,483 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:04:11,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash -418291469, now seen corresponding path program 1 times [2023-08-04 01:04:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:11,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37263816] [2023-08-04 01:04:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:04:11,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:04:11,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37263816] [2023-08-04 01:04:11,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37263816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:04:11,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:04:11,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:04:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314593101] [2023-08-04 01:04:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:04:11,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:04:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:04:11,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:04:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:04:11,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 237 [2023-08-04 01:04:11,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 47 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 01:04:11,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:04:11,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 237 [2023-08-04 01:04:11,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:04:16,056 INFO L124 PetriNetUnfolderBase]: 61102/79423 cut-off events. [2023-08-04 01:04:16,056 INFO L125 PetriNetUnfolderBase]: For 10834/10834 co-relation queries the response was YES. [2023-08-04 01:04:16,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169172 conditions, 79423 events. 61102/79423 cut-off events. For 10834/10834 co-relation queries the response was YES. Maximal size of possible extension queue 2917. Compared 454097 event pairs, 8614 based on Foata normal form. 6561/85893 useless extension candidates. Maximal degree in co-relation 86051. Up to 49572 conditions per place. [2023-08-04 01:04:16,448 INFO L140 encePairwiseOnDemand]: 235/237 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-04 01:04:16,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 349 flow [2023-08-04 01:04:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:04:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:04:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 602 transitions. [2023-08-04 01:04:16,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6350210970464135 [2023-08-04 01:04:16,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 602 transitions. [2023-08-04 01:04:16,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 602 transitions. [2023-08-04 01:04:16,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:04:16,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 602 transitions. [2023-08-04 01:04:16,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.5) internal successors, (602), 4 states have internal predecessors, (602), 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 01:04:16,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:16,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:16,453 INFO L175 Difference]: Start difference. First operand has 77 places, 47 transitions, 173 flow. Second operand 4 states and 602 transitions. [2023-08-04 01:04:16,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 349 flow [2023-08-04 01:04:17,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 342 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:04:17,582 INFO L231 Difference]: Finished difference. Result has 75 places, 0 transitions, 0 flow [2023-08-04 01:04:17,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=75, PETRI_TRANSITIONS=0} [2023-08-04 01:04:17,583 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 11 predicate places. [2023-08-04 01:04:17,583 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 0 transitions, 0 flow [2023-08-04 01:04:17,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 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 01:04:17,583 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 01:04:17,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 01:04:17,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 01:04:17,584 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 01:04:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 01:04:17,584 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:04:17,584 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 01:04:17,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 154 transitions, 356 flow [2023-08-04 01:04:17,801 INFO L124 PetriNetUnfolderBase]: 282/4026 cut-off events. [2023-08-04 01:04:17,801 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:04:17,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 4026 events. 282/4026 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 38513 event pairs, 0 based on Foata normal form. 0/3543 useless extension candidates. Maximal degree in co-relation 2929. Up to 162 conditions per place. [2023-08-04 01:04:17,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 154 transitions, 356 flow [2023-08-04 01:04:17,825 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 136 transitions, 304 flow [2023-08-04 01:04:17,825 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:04:17,825 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 136 transitions, 304 flow [2023-08-04 01:04:17,825 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 136 transitions, 304 flow [2023-08-04 01:04:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 136 transitions, 304 flow [2023-08-04 01:04:18,027 INFO L124 PetriNetUnfolderBase]: 201/2852 cut-off events. [2023-08-04 01:04:18,027 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 01:04:18,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3061 conditions, 2852 events. 201/2852 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 25097 event pairs, 0 based on Foata normal form. 0/2531 useless extension candidates. Maximal degree in co-relation 2134. Up to 162 conditions per place. [2023-08-04 01:04:18,077 INFO L119 LiptonReduction]: Number of co-enabled transitions 5976 [2023-08-04 01:04:19,872 INFO L134 LiptonReduction]: Checked pairs total: 11059 [2023-08-04 01:04:19,872 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 01:04:19,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:04:19,874 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;@7e832841, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:04:19,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:04:19,876 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:04:19,876 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 01:04:19,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:04:19,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:19,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 01:04:19,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:04:19,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:19,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1854075668, now seen corresponding path program 1 times [2023-08-04 01:04:19,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:19,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372304634] [2023-08-04 01:04:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:19,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:19,915 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 01:04:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:04:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372304634] [2023-08-04 01:04:19,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372304634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:04:19,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:04:19,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:04:19,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463963792] [2023-08-04 01:04:19,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:04:19,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:04:19,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:04:19,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:04:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:04:19,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 250 [2023-08-04 01:04:19,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 46 transitions, 124 flow. Second operand has 3 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 01:04:19,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:04:19,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 250 [2023-08-04 01:04:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:02,157 INFO L124 PetriNetUnfolderBase]: 576290/729987 cut-off events. [2023-08-04 01:05:02,157 INFO L125 PetriNetUnfolderBase]: For 20589/20589 co-relation queries the response was YES. [2023-08-04 01:05:04,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1466668 conditions, 729987 events. 576290/729987 cut-off events. For 20589/20589 co-relation queries the response was YES. Maximal size of possible extension queue 15401. Compared 4782961 event pairs, 485484 based on Foata normal form. 0/691337 useless extension candidates. Maximal degree in co-relation 432882. Up to 712500 conditions per place. [2023-08-04 01:05:06,978 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 40 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 01:05:06,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 216 flow [2023-08-04 01:05:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:05:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:05:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-04 01:05:06,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5973333333333334 [2023-08-04 01:05:06,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-04 01:05:06,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-04 01:05:06,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:06,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-04 01:05:06,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 01:05:06,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:05:06,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:05:06,983 INFO L175 Difference]: Start difference. First operand has 63 places, 46 transitions, 124 flow. Second operand 3 states and 448 transitions. [2023-08-04 01:05:06,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 216 flow [2023-08-04 01:05:06,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 50 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:05:06,988 INFO L231 Difference]: Finished difference. Result has 66 places, 47 transitions, 136 flow [2023-08-04 01:05:06,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=66, PETRI_TRANSITIONS=47} [2023-08-04 01:05:06,989 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-04 01:05:06,989 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 47 transitions, 136 flow [2023-08-04 01:05:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 01:05:06,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:06,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:06,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 01:05:06,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:05:06,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1480927667, now seen corresponding path program 1 times [2023-08-04 01:05:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:06,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355426230] [2023-08-04 01:05:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:07,020 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 01:05:07,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:07,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355426230] [2023-08-04 01:05:07,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355426230] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:07,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205930505] [2023-08-04 01:05:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:07,025 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 01:05:07,028 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 01:05:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:07,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:05:07,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:07,114 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 01:05:07,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:05:07,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205930505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:07,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:05:07,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:05:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279393701] [2023-08-04 01:05:07,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:07,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:05:07,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:05:07,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:07,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 250 [2023-08-04 01:05:07,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 47 transitions, 136 flow. Second operand has 3 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 01:05:07,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:07,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 250 [2023-08-04 01:05:07,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:48,739 INFO L124 PetriNetUnfolderBase]: 543278/690581 cut-off events. [2023-08-04 01:05:48,740 INFO L125 PetriNetUnfolderBase]: For 18135/18135 co-relation queries the response was YES. [2023-08-04 01:05:51,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1381992 conditions, 690581 events. 543278/690581 cut-off events. For 18135/18135 co-relation queries the response was YES. Maximal size of possible extension queue 15482. Compared 4550528 event pairs, 459424 based on Foata normal form. 0/656476 useless extension candidates. Maximal degree in co-relation 1381953. Up to 668923 conditions per place. [2023-08-04 01:05:53,573 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 01:05:53,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 246 flow [2023-08-04 01:05:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:05:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:05:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-04 01:05:53,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6026666666666667 [2023-08-04 01:05:53,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-04 01:05:53,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-04 01:05:53,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:53,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-04 01:05:53,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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 01:05:53,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:05:53,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:05:53,579 INFO L175 Difference]: Start difference. First operand has 66 places, 47 transitions, 136 flow. Second operand 3 states and 452 transitions. [2023-08-04 01:05:53,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 246 flow [2023-08-04 01:05:53,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:05:53,581 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 146 flow [2023-08-04 01:05:53,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2023-08-04 01:05:53,581 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 01:05:53,582 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 146 flow [2023-08-04 01:05:53,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 01:05:53,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:53,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:53,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 01:05:53,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 01:05:53,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:05:53,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1880872328, now seen corresponding path program 1 times [2023-08-04 01:05:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:53,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804619530] [2023-08-04 01:05:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:53,819 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 01:05:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804619530] [2023-08-04 01:05:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804619530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:53,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353185636] [2023-08-04 01:05:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:53,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:53,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:53,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:53,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 01:05:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:53,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:05:53,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:53,915 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 01:05:53,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:05:53,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353185636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:53,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:05:53,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:05:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861648707] [2023-08-04 01:05:53,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:53,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:05:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:53,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:05:53,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:53,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 250 [2023-08-04 01:05:53,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 01:05:53,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:53,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 250 [2023-08-04 01:05:53,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:06:36,604 INFO L124 PetriNetUnfolderBase]: 512846/641426 cut-off events. [2023-08-04 01:06:36,604 INFO L125 PetriNetUnfolderBase]: For 15521/15521 co-relation queries the response was YES. [2023-08-04 01:06:39,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291939 conditions, 641426 events. 512846/641426 cut-off events. For 15521/15521 co-relation queries the response was YES. Maximal size of possible extension queue 14998. Compared 4061319 event pairs, 434270 based on Foata normal form. 0/614482 useless extension candidates. Maximal degree in co-relation 384726. Up to 627005 conditions per place. [2023-08-04 01:06:41,353 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 01:06:41,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 274 flow [2023-08-04 01:06:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:06:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:06:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-04 01:06:41,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2023-08-04 01:06:41,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-04 01:06:41,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-04 01:06:41,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:06:41,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-04 01:06:41,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:06:41,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:06:41,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:06:41,358 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 146 flow. Second operand 3 states and 456 transitions. [2023-08-04 01:06:41,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 274 flow [2023-08-04 01:06:41,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:06:41,367 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 156 flow [2023-08-04 01:06:41,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-04 01:06:41,368 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 01:06:41,368 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 156 flow [2023-08-04 01:06:41,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 01:06:41,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:06:41,368 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 01:06:41,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 01:06:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 01:06:41,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:06:41,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:06:41,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1204025562, now seen corresponding path program 1 times [2023-08-04 01:06:41,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:06:41,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505048665] [2023-08-04 01:06:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:06:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:41,624 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 01:06:41,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:06:41,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505048665] [2023-08-04 01:06:41,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505048665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:06:41,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712258410] [2023-08-04 01:06:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:41,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:06:41,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:06:41,627 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:06:41,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 01:06:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:41,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:06:41,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:06:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:06:41,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:06:41,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712258410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:06:41,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:06:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:06:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177333502] [2023-08-04 01:06:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:06:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:06:41,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:06:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:06:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:06:41,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 250 [2023-08-04 01:06:41,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 01:06:41,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:06:41,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 250 [2023-08-04 01:06:41,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:23,924 INFO L124 PetriNetUnfolderBase]: 500750/624398 cut-off events. [2023-08-04 01:07:23,924 INFO L125 PetriNetUnfolderBase]: For 10153/10153 co-relation queries the response was YES. [2023-08-04 01:07:26,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263356 conditions, 624398 events. 500750/624398 cut-off events. For 10153/10153 co-relation queries the response was YES. Maximal size of possible extension queue 14869. Compared 3846248 event pairs, 404846 based on Foata normal form. 0/603502 useless extension candidates. Maximal degree in co-relation 370844. Up to 574973 conditions per place. [2023-08-04 01:07:28,685 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 55 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 01:07:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 302 flow [2023-08-04 01:07:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-04 01:07:28,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2023-08-04 01:07:28,687 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-04 01:07:28,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-04 01:07:28,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:28,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-04 01:07:28,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:07:28,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:07:28,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:07:28,690 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 156 flow. Second operand 3 states and 460 transitions. [2023-08-04 01:07:28,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 302 flow [2023-08-04 01:07:28,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 300 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:28,716 INFO L231 Difference]: Finished difference. Result has 72 places, 50 transitions, 166 flow [2023-08-04 01:07:28,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=72, PETRI_TRANSITIONS=50} [2023-08-04 01:07:28,716 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 01:07:28,716 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 50 transitions, 166 flow [2023-08-04 01:07:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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 01:07:28,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:28,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:28,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 01:07:28,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 01:07:28,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:28,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash 909117857, now seen corresponding path program 1 times [2023-08-04 01:07:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:28,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978051643] [2023-08-04 01:07:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:07:28,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978051643] [2023-08-04 01:07:28,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978051643] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:28,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524445265] [2023-08-04 01:07:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:28,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:28,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:28,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:07:28,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 01:07:29,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:29,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:29,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:07:29,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:07:29,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524445265] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:29,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:29,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 01:07:29,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38333534] [2023-08-04 01:07:29,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:29,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:07:29,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:07:29,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:07:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 250 [2023-08-04 01:07:29,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 50 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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 01:07:29,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:29,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 250 [2023-08-04 01:07:29,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:08:03,596 INFO L124 PetriNetUnfolderBase]: 389704/482120 cut-off events. [2023-08-04 01:08:03,596 INFO L125 PetriNetUnfolderBase]: For 43953/43953 co-relation queries the response was YES. [2023-08-04 01:08:06,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011464 conditions, 482120 events. 389704/482120 cut-off events. For 43953/43953 co-relation queries the response was YES. Maximal size of possible extension queue 11678. Compared 2841944 event pairs, 276612 based on Foata normal form. 3/481681 useless extension candidates. Maximal degree in co-relation 355983. Up to 474490 conditions per place. [2023-08-04 01:08:07,549 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 46 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 01:08:07,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 58 transitions, 282 flow [2023-08-04 01:08:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:08:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:08:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-04 01:08:07,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584 [2023-08-04 01:08:07,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-04 01:08:07,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-04 01:08:07,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:08:07,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-04 01:08:07,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 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 01:08:07,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:07,554 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:07,554 INFO L175 Difference]: Start difference. First operand has 72 places, 50 transitions, 166 flow. Second operand 4 states and 584 transitions. [2023-08-04 01:08:07,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 58 transitions, 282 flow [2023-08-04 01:08:07,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:08:07,672 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 178 flow [2023-08-04 01:08:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2023-08-04 01:08:07,673 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 13 predicate places. [2023-08-04 01:08:07,673 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 178 flow [2023-08-04 01:08:07,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 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 01:08:07,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:08:07,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:08:07,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-04 01:08:07,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 01:08:07,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:08:07,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:08:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1632227015, now seen corresponding path program 1 times [2023-08-04 01:08:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:08:07,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445027060] [2023-08-04 01:08:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:07,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:08:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:08:07,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:08:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445027060] [2023-08-04 01:08:07,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445027060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:08:07,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682981377] [2023-08-04 01:08:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:07,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:08:07,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:08:07,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:08:07,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 01:08:08,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:08,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:08:08,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:08:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:08:08,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:08:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:08:08,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682981377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:08:08,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:08:08,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:08:08,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723005413] [2023-08-04 01:08:08,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:08:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:08:08,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:08:08,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:08:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:08:08,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 250 [2023-08-04 01:08:08,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:08:08,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:08:08,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 250 [2023-08-04 01:08:08,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:08:31,683 INFO L124 PetriNetUnfolderBase]: 303022/372454 cut-off events. [2023-08-04 01:08:31,683 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 01:08:33,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777479 conditions, 372454 events. 303022/372454 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 9749. Compared 2100556 event pairs, 217966 based on Foata normal form. 27/372147 useless extension candidates. Maximal degree in co-relation 273290. Up to 365929 conditions per place. [2023-08-04 01:08:34,863 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 54 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 01:08:34,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 66 transitions, 326 flow [2023-08-04 01:08:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:08:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:08:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-04 01:08:34,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2023-08-04 01:08:34,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-04 01:08:34,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-04 01:08:34,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:08:34,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-04 01:08:34,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 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 01:08:34,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:34,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:34,867 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 178 flow. Second operand 4 states and 592 transitions. [2023-08-04 01:08:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 66 transitions, 326 flow [2023-08-04 01:08:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 319 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:08:34,926 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 185 flow [2023-08-04 01:08:34,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2023-08-04 01:08:34,927 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 15 predicate places. [2023-08-04 01:08:34,927 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 185 flow [2023-08-04 01:08:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.6) internal successors, (693), 5 states have internal predecessors, (693), 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 01:08:34,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:08:34,928 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, 1, 1, 1, 1] [2023-08-04 01:08:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 01:08:35,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 01:08:35,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:08:35,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:08:35,129 INFO L85 PathProgramCache]: Analyzing trace with hash 663817781, now seen corresponding path program 1 times [2023-08-04 01:08:35,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:08:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586917527] [2023-08-04 01:08:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:35,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:08:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:08:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:08:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586917527] [2023-08-04 01:08:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586917527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:08:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759600817] [2023-08-04 01:08:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:35,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:08:35,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:08:35,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:08:35,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 01:08:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:35,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:08:35,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:08:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:08:35,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:08:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:08:35,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759600817] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:08:35,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:08:35,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:08:35,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031428670] [2023-08-04 01:08:35,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:08:35,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:08:35,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:08:35,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:08:35,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:08:35,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 250 [2023-08-04 01:08:35,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 185 flow. Second operand has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 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 01:08:35,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:08:35,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 250 [2023-08-04 01:08:35,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:08:54,281 INFO L124 PetriNetUnfolderBase]: 237520/289942 cut-off events. [2023-08-04 01:08:54,282 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 01:08:55,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 605632 conditions, 289942 events. 237520/289942 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 8808. Compared 1593003 event pairs, 168724 based on Foata normal form. 243/290094 useless extension candidates. Maximal degree in co-relation 212642. Up to 275692 conditions per place. [2023-08-04 01:08:56,750 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 62 selfloop transitions, 3 changer transitions 1/74 dead transitions. [2023-08-04 01:08:56,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 74 transitions, 365 flow [2023-08-04 01:08:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:08:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:08:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 600 transitions. [2023-08-04 01:08:56,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-08-04 01:08:56,752 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 600 transitions. [2023-08-04 01:08:56,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 600 transitions. [2023-08-04 01:08:56,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:08:56,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 600 transitions. [2023-08-04 01:08:56,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 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 01:08:56,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:56,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:08:56,754 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 185 flow. Second operand 4 states and 600 transitions. [2023-08-04 01:08:56,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 74 transitions, 365 flow [2023-08-04 01:08:56,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 358 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:08:56,848 INFO L231 Difference]: Finished difference. Result has 80 places, 50 transitions, 192 flow [2023-08-04 01:08:56,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=80, PETRI_TRANSITIONS=50} [2023-08-04 01:08:56,849 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 17 predicate places. [2023-08-04 01:08:56,849 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 50 transitions, 192 flow [2023-08-04 01:08:56,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 138.8) internal successors, (694), 5 states have internal predecessors, (694), 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 01:08:56,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:08:56,850 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, 1, 1, 1] [2023-08-04 01:08:56,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 01:08:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:08:57,053 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:08:57,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:08:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1285473958, now seen corresponding path program 1 times [2023-08-04 01:08:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:08:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271331870] [2023-08-04 01:08:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:08:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:08:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:08:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271331870] [2023-08-04 01:08:57,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271331870] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:08:57,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377036377] [2023-08-04 01:08:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:08:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:08:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:08:57,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:08:57,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 01:08:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:08:57,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:08:57,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:08:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:08:57,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:08:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:08:57,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377036377] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:08:57,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:08:57,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:08:57,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336834614] [2023-08-04 01:08:57,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:08:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:08:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:08:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:08:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:08:57,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 250 [2023-08-04 01:08:57,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 50 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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 01:08:57,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:08:57,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 250 [2023-08-04 01:08:57,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:09:13,910 INFO L124 PetriNetUnfolderBase]: 214192/261673 cut-off events. [2023-08-04 01:09:13,910 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 01:09:15,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549490 conditions, 261673 events. 214192/261673 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8224. Compared 1393769 event pairs, 91720 based on Foata normal form. 2187/263769 useless extension candidates. Maximal degree in co-relation 192794. Up to 135913 conditions per place. [2023-08-04 01:09:15,864 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 70 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-04 01:09:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 82 transitions, 404 flow [2023-08-04 01:09:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:09:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:09:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 01:09:15,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2023-08-04 01:09:15,866 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 01:09:15,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 01:09:15,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:09:15,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 01:09:15,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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 01:09:15,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:09:15,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 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 01:09:15,869 INFO L175 Difference]: Start difference. First operand has 80 places, 50 transitions, 192 flow. Second operand 4 states and 608 transitions. [2023-08-04 01:09:15,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 82 transitions, 404 flow [2023-08-04 01:09:15,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 397 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:09:15,925 INFO L231 Difference]: Finished difference. Result has 82 places, 50 transitions, 199 flow [2023-08-04 01:09:15,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=82, PETRI_TRANSITIONS=50} [2023-08-04 01:09:15,925 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 01:09:15,925 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 50 transitions, 199 flow [2023-08-04 01:09:15,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.0) internal successors, (695), 5 states have internal predecessors, (695), 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 01:09:15,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:09:15,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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 01:09:15,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 01:09:16,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:09:16,127 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:09:16,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:09:16,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1843058450, now seen corresponding path program 1 times [2023-08-04 01:09:16,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:09:16,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176160759] [2023-08-04 01:09:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:09:16,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:09:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:09:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 01:09:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:09:16,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176160759] [2023-08-04 01:09:16,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176160759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:09:16,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:09:16,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 01:09:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273029569] [2023-08-04 01:09:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:09:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:09:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:09:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:09:16,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:09:16,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 250 [2023-08-04 01:09:16,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 01:09:16,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:09:16,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 250 [2023-08-04 01:09:16,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:10:08,575 INFO L124 PetriNetUnfolderBase]: 600598/715999 cut-off events. [2023-08-04 01:10:08,575 INFO L125 PetriNetUnfolderBase]: For 294953/294953 co-relation queries the response was YES. [2023-08-04 01:10:12,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602895 conditions, 715999 events. 600598/715999 cut-off events. For 294953/294953 co-relation queries the response was YES. Maximal size of possible extension queue 14316. Compared 3689814 event pairs, 213706 based on Foata normal form. 81/715931 useless extension candidates. Maximal degree in co-relation 1602801. Up to 714631 conditions per place. [2023-08-04 01:10:14,985 INFO L140 encePairwiseOnDemand]: 244/250 looper letters, 76 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2023-08-04 01:10:14,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 524 flow [2023-08-04 01:10:14,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:10:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:10:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-04 01:10:14,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2023-08-04 01:10:14,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-04 01:10:14,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-04 01:10:14,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:10:14,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-04 01:10:14,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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 01:10:14,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:10:14,989 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:10:14,989 INFO L175 Difference]: Start difference. First operand has 82 places, 50 transitions, 199 flow. Second operand 3 states and 455 transitions. [2023-08-04 01:10:14,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 524 flow [2023-08-04 01:10:15,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 510 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 01:10:15,135 INFO L231 Difference]: Finished difference. Result has 82 places, 54 transitions, 225 flow [2023-08-04 01:10:15,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2023-08-04 01:10:15,136 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 19 predicate places. [2023-08-04 01:10:15,136 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 225 flow [2023-08-04 01:10:15,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 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 01:10:15,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:10:15,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:10:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 01:10:15,136 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:10:15,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:10:15,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1300237624, now seen corresponding path program 1 times [2023-08-04 01:10:15,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:10:15,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038245303] [2023-08-04 01:10:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:10:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:10:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:10:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 01:10:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:10:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038245303] [2023-08-04 01:10:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038245303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:10:15,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:10:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:10:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504012450] [2023-08-04 01:10:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:10:15,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:10:15,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:10:15,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:10:15,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:10:15,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 250 [2023-08-04 01:10:15,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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 01:10:15,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:10:15,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 250 [2023-08-04 01:10:15,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:11:03,301 INFO L124 PetriNetUnfolderBase]: 593146/708205 cut-off events. [2023-08-04 01:11:03,301 INFO L125 PetriNetUnfolderBase]: For 201958/201958 co-relation queries the response was YES. [2023-08-04 01:11:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1675068 conditions, 708205 events. 593146/708205 cut-off events. For 201958/201958 co-relation queries the response was YES. Maximal size of possible extension queue 14083. Compared 3524190 event pairs, 121534 based on Foata normal form. 1215/708828 useless extension candidates. Maximal degree in co-relation 1219370. Up to 675937 conditions per place. [2023-08-04 01:11:09,379 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 72 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-04 01:11:09,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 481 flow [2023-08-04 01:11:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:11:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:11:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 01:11:09,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986666666666667 [2023-08-04 01:11:09,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 01:11:09,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 01:11:09,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:11:09,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 01:11:09,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 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 01:11:09,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:11:09,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:11:09,384 INFO L175 Difference]: Start difference. First operand has 82 places, 54 transitions, 225 flow. Second operand 3 states and 449 transitions. [2023-08-04 01:11:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 481 flow [2023-08-04 01:11:09,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 81 transitions, 476 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:11:09,731 INFO L231 Difference]: Finished difference. Result has 84 places, 56 transitions, 249 flow [2023-08-04 01:11:09,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2023-08-04 01:11:09,732 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2023-08-04 01:11:09,732 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 249 flow [2023-08-04 01:11:09,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 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 01:11:09,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:11:09,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:11:09,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 01:11:09,733 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:11:09,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:11:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1302201536, now seen corresponding path program 1 times [2023-08-04 01:11:09,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:11:09,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214138414] [2023-08-04 01:11:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:11:09,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:11:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:11:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-04 01:11:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:11:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214138414] [2023-08-04 01:11:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214138414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:11:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558048667] [2023-08-04 01:11:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:11:09,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:11:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:11:09,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:11:09,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 01:11:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:11:09,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 01:11:09,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:11:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 01:11:10,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:11:10,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558048667] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:11:10,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:11:10,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-04 01:11:10,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240102529] [2023-08-04 01:11:10,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:11:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:11:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:11:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:11:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:11:10,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 250 [2023-08-04 01:11:10,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 01:11:10,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:11:10,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 250 [2023-08-04 01:11:10,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:11:24,195 INFO L124 PetriNetUnfolderBase]: 171242/207341 cut-off events. [2023-08-04 01:11:24,195 INFO L125 PetriNetUnfolderBase]: For 143322/143322 co-relation queries the response was YES. [2023-08-04 01:11:25,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540783 conditions, 207341 events. 171242/207341 cut-off events. For 143322/143322 co-relation queries the response was YES. Maximal size of possible extension queue 6045. Compared 1047268 event pairs, 42466 based on Foata normal form. 256/207501 useless extension candidates. Maximal degree in co-relation 346162. Up to 201280 conditions per place. [2023-08-04 01:11:26,024 INFO L140 encePairwiseOnDemand]: 240/250 looper letters, 83 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2023-08-04 01:11:26,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 639 flow [2023-08-04 01:11:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:11:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:11:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-04 01:11:26,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6173333333333333 [2023-08-04 01:11:26,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-04 01:11:26,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-04 01:11:26,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:11:26,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-04 01:11:26,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 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 01:11:26,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:11:26,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 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 01:11:26,028 INFO L175 Difference]: Start difference. First operand has 84 places, 56 transitions, 249 flow. Second operand 3 states and 463 transitions. [2023-08-04 01:11:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 639 flow [2023-08-04 01:11:26,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 630 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:11:26,081 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 305 flow [2023-08-04 01:11:26,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2023-08-04 01:11:26,081 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2023-08-04 01:11:26,082 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 305 flow [2023-08-04 01:11:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 01:11:26,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:11:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:11:26,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 01:11:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-04 01:11:26,283 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:11:26,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:11:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 745142799, now seen corresponding path program 1 times [2023-08-04 01:11:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:11:26,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711036881] [2023-08-04 01:11:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:11:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:11:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:11:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 01:11:26,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:11:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711036881] [2023-08-04 01:11:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711036881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:11:26,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688716962] [2023-08-04 01:11:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:11:26,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:11:26,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:11:26,420 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:11:26,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 01:11:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:11:26,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 01:11:26,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:11:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 01:11:26,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:11:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 01:11:26,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688716962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:11:26,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:11:26,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 7 [2023-08-04 01:11:26,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909052070] [2023-08-04 01:11:26,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:11:26,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 01:11:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:11:26,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 01:11:26,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 01:11:26,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 250 [2023-08-04 01:11:26,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 305 flow. Second operand has 8 states, 8 states have (on average 127.375) internal successors, (1019), 8 states have internal predecessors, (1019), 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 01:11:26,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:11:26,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 250 [2023-08-04 01:11:26,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 01:11:50,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 01:11:50,776 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 01:11:51,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 01:11:51,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-08-04 01:11:52,761 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 01:11:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 01:11:52,761 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 01:11:52,761 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:11:52,762 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (2/2) [2023-08-04 01:11:52,762 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 01:11:52,762 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 01:11:52,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 01:11:52 BasicIcfg [2023-08-04 01:11:52,765 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 01:11:52,765 INFO L158 Benchmark]: Toolchain (without parser) took 611490.17ms. Allocated memory was 341.8MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 291.5MB in the beginning and 13.2GB in the end (delta: -12.9GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 293.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: CACSL2BoogieTranslator took 520.01ms. Allocated memory is still 341.8MB. Free memory was 291.2MB in the beginning and 270.4MB in the end (delta: 20.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.38ms. Allocated memory is still 341.8MB. Free memory was 270.4MB in the beginning and 268.2MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: Boogie Preprocessor took 26.94ms. Allocated memory is still 341.8MB. Free memory was 268.2MB in the beginning and 266.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: RCFGBuilder took 347.88ms. Allocated memory is still 341.8MB. Free memory was 266.3MB in the beginning and 250.2MB in the end (delta: 16.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 01:11:52,766 INFO L158 Benchmark]: TraceAbstraction took 610530.07ms. Allocated memory was 341.8MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 249.5MB in the beginning and 13.2GB in the end (delta: -12.9GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2023-08-04 01:11:52,767 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 341.8MB. Free memory is still 293.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 520.01ms. Allocated memory is still 341.8MB. Free memory was 291.2MB in the beginning and 270.4MB in the end (delta: 20.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.38ms. Allocated memory is still 341.8MB. Free memory was 270.4MB in the beginning and 268.2MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 26.94ms. Allocated memory is still 341.8MB. Free memory was 268.2MB in the beginning and 266.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 347.88ms. Allocated memory is still 341.8MB. Free memory was 266.3MB in the beginning and 250.2MB in the end (delta: 16.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 610530.07ms. Allocated memory was 341.8MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 249.5MB in the beginning and 13.2GB in the end (delta: -12.9GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 104 PlacesBefore, 38 PlacesAfterwards, 98 TransitionsBefore, 29 TransitionsAfterwards, 1822 CoEnabledTransitionPairs, 5 FixpointIterations, 19 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 75 TotalNumberOfCompositions, 2830 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1950, independent: 1884, independent conditional: 0, independent unconditional: 1884, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 957, independent: 941, independent conditional: 0, independent unconditional: 941, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1950, independent: 943, independent conditional: 0, independent unconditional: 943, dependent: 50, dependent conditional: 0, dependent unconditional: 50, unknown: 957, unknown conditional: 0, unknown unconditional: 957] , Statistics on independence cache: Total cache size (in pairs): 114, Positive cache size: 107, Positive conditional cache size: 0, Positive unconditional cache size: 107, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 138 PlacesBefore, 64 PlacesAfterwards, 124 TransitionsBefore, 47 TransitionsAfterwards, 4792 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 83 TotalNumberOfCompositions, 10007 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4950, independent: 4794, independent conditional: 0, independent unconditional: 4794, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2320, independent: 2288, independent conditional: 0, independent unconditional: 2288, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4950, independent: 2506, independent conditional: 0, independent unconditional: 2506, dependent: 124, dependent conditional: 0, dependent unconditional: 124, unknown: 2320, unknown conditional: 0, unknown unconditional: 2320] , Statistics on independence cache: Total cache size (in pairs): 261, Positive cache size: 244, Positive conditional cache size: 0, Positive unconditional cache size: 244, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 148 PlacesBefore, 63 PlacesAfterwards, 136 TransitionsBefore, 46 TransitionsAfterwards, 5976 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 62 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 5 ChoiceCompositions, 96 TotalNumberOfCompositions, 11059 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5918, independent: 5752, independent conditional: 0, independent unconditional: 5752, dependent: 166, dependent conditional: 0, dependent unconditional: 166, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2960, independent: 2922, independent conditional: 0, independent unconditional: 2922, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5918, independent: 2830, independent conditional: 0, independent unconditional: 2830, dependent: 128, dependent conditional: 0, dependent unconditional: 128, unknown: 2960, unknown conditional: 0, unknown unconditional: 2960] , Statistics on independence cache: Total cache size (in pairs): 302, Positive cache size: 283, Positive conditional cache size: 0, Positive unconditional cache size: 283, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 9 procedures, 149 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 13 procedures, 175 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 152.6s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 146.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 422 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 348 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1050 IncrementalHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 12 mSDtfsCounter, 1050 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 233 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=8, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 437 ConstructedInterpolants, 0 QuantifiedInterpolants, 673 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1348 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 248/274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 175 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 455.2s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 449.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 649 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 512 mSDsluCounter, 112 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 55 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1509 IncrementalHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 57 mSDtfsCounter, 1509 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 410 GetRequests, 365 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=305occurred in iteration=11, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 551 NumberOfCodeBlocks, 551 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 678 ConstructedInterpolants, 0 QuantifiedInterpolants, 2157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1833 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 26 InterpolantComputations, 7 PerfectInterpolantSequences, 291/318 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown