/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/weaver_popl20-more-min-le-max.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:07:32,554 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:07:32,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:07:32,623 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:07:32,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:07:32,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:07:32,624 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:07:32,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:07:32,649 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:07:32,652 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:07:32,653 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:07:32,653 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:07:32,653 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:07:32,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:07:32,655 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:07:32,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:07:32,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:07:32,655 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:07:32,656 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:07:32,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:07:32,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:07:32,656 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:07:32,657 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:07:32,657 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:07:32,657 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:07:32,657 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:07:32,657 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:07:32,658 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:07:32,658 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:07:32,658 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:07:32,659 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:07:32,659 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:07:32,659 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:07:32,660 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:07:32,661 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:07:32,661 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:07:32,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 03:07:32,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:07:32,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:07:32,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:07:32,874 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:07:32,874 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:07:32,875 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 03:07:33,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:07:34,104 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:07:34,105 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 03:07:34,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98d57b76/c6957f84bcda45528c46f1cdee79faf5/FLAG02badf836 [2023-08-04 03:07:34,123 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d98d57b76/c6957f84bcda45528c46f1cdee79faf5 [2023-08-04 03:07:34,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:07:34,128 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:07:34,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:07:34,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:07:34,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:07:34,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,133 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1625a8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34, skipping insertion in model container [2023-08-04 03:07:34,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,163 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:07:34,296 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c[2729,2742] [2023-08-04 03:07:34,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:07:34,305 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:07:34,319 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-min-le-max.wvr_bound2.c[2729,2742] [2023-08-04 03:07:34,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:07:34,328 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:07:34,328 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 03:07:34,333 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:07:34,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34 WrapperNode [2023-08-04 03:07:34,334 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:07:34,335 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:07:34,335 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:07:34,335 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:07:34,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,365 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 154 [2023-08-04 03:07:34,365 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:07:34,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:07:34,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:07:34,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:07:34,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,383 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,386 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,387 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:07:34,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:07:34,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:07:34,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:07:34,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (1/1) ... [2023-08-04 03:07:34,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:07:34,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:34,458 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 03:07:34,493 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 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 03:07:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 03:07:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 03:07:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:07:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:07:34,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:07:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:07:34,516 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 03:07:34,594 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:07:34,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:07:34,825 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:07:34,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:07:34,880 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-08-04 03:07:34,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:07:34 BoogieIcfgContainer [2023-08-04 03:07:34,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:07:34,885 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:07:34,886 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:07:34,888 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:07:34,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:07:34" (1/3) ... [2023-08-04 03:07:34,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc73cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:07:34, skipping insertion in model container [2023-08-04 03:07:34,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:07:34" (2/3) ... [2023-08-04 03:07:34,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc73cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:07:34, skipping insertion in model container [2023-08-04 03:07:34,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:07:34" (3/3) ... [2023-08-04 03:07:34,890 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-min-le-max.wvr_bound2.c [2023-08-04 03:07:34,896 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:07:34,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:07:34,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:07:34,903 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:07:34,951 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 03:07:34,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,131 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 03:07:35,131 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:07:35,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 03:07:35,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,155 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:07:35,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,174 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 188 transitions, 418 flow [2023-08-04 03:07:35,248 INFO L124 PetriNetUnfolderBase]: 93/635 cut-off events. [2023-08-04 03:07:35,249 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 03:07:35,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 635 events. 93/635 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3047 event pairs, 0 based on Foata normal form. 0/532 useless extension candidates. Maximal degree in co-relation 353. Up to 16 conditions per place. [2023-08-04 03:07:35,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 4058 [2023-08-04 03:07:39,872 INFO L134 LiptonReduction]: Checked pairs total: 6670 [2023-08-04 03:07:39,872 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-04 03:07:39,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:07:39,886 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7dba2126, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:07:39,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:07:39,890 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:07:39,890 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 03:07:39,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:07:39,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:39,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 03:07:39,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:39,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:39,895 INFO L85 PathProgramCache]: Analyzing trace with hash -974613038, now seen corresponding path program 1 times [2023-08-04 03:07:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:39,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921282092] [2023-08-04 03:07:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:40,265 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 03:07:40,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:40,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921282092] [2023-08-04 03:07:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921282092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:40,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:07:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 03:07:40,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571920219] [2023-08-04 03:07:40,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:40,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:07:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:07:40,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:07:40,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 352 [2023-08-04 03:07:40,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 47 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 03:07:40,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:40,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 352 [2023-08-04 03:07:40,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:40,512 INFO L124 PetriNetUnfolderBase]: 1442/2185 cut-off events. [2023-08-04 03:07:40,512 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 03:07:40,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4443 conditions, 2185 events. 1442/2185 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11025 event pairs, 737 based on Foata normal form. 0/1385 useless extension candidates. Maximal degree in co-relation 3442. Up to 2049 conditions per place. [2023-08-04 03:07:40,518 INFO L140 encePairwiseOnDemand]: 348/352 looper letters, 18 selfloop transitions, 2 changer transitions 22/47 dead transitions. [2023-08-04 03:07:40,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 214 flow [2023-08-04 03:07:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:40,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 03:07:40,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-04 03:07:40,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 03:07:40,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 03:07:40,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:40,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 03:07:40,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 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 03:07:40,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:07:40,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 352.0) internal successors, (1408), 4 states have internal predecessors, (1408), 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 03:07:40,540 INFO L175 Difference]: Start difference. First operand has 42 places, 47 transitions, 136 flow. Second operand 3 states and 506 transitions. [2023-08-04 03:07:40,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 214 flow [2023-08-04 03:07:40,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 47 transitions, 214 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:07:40,544 INFO L231 Difference]: Finished difference. Result has 44 places, 25 transitions, 75 flow [2023-08-04 03:07:40,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=352, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=75, PETRI_PLACES=44, PETRI_TRANSITIONS=25} [2023-08-04 03:07:40,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 03:07:40,548 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 25 transitions, 75 flow [2023-08-04 03:07:40,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 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 03:07:40,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:40,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:40,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:07:40,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:40,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1012811841, now seen corresponding path program 1 times [2023-08-04 03:07:40,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:40,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934222263] [2023-08-04 03:07:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:40,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:07:40,565 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:07:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:07:40,587 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:07:40,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:07:40,589 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:07:40,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:07:40,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:07:40,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 03:07:40,590 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:07:40,591 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 03:07:40,592 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:07:40,592 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:07:40,610 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 03:07:40,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:40,941 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 03:07:40,941 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:07:40,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31992 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 03:07:40,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:40,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:40,975 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:07:40,976 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:40,977 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:40,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:07:41,278 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 03:07:41,279 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:07:41,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31992 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 03:07:41,352 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-04 03:07:45,759 INFO L134 LiptonReduction]: Checked pairs total: 22285 [2023-08-04 03:07:45,760 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-08-04 03:07:45,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:07:45,767 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;@7dba2126, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:07:45,767 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 03:07:45,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:07:45,776 INFO L124 PetriNetUnfolderBase]: 12/110 cut-off events. [2023-08-04 03:07:45,776 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 03:07:45,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:45,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 03:07:45,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:45,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 20928726, now seen corresponding path program 1 times [2023-08-04 03:07:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:45,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601145480] [2023-08-04 03:07:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:45,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:45,863 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 03:07:45,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601145480] [2023-08-04 03:07:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601145480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984545297] [2023-08-04 03:07:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:45,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:45,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:45,867 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 03:07:45,902 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 03:07:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:45,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:07:45,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:45,984 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 03:07:45,984 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:07:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984545297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:07:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:07:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554973980] [2023-08-04 03:07:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:07:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:45,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:07:45,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:07:46,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 407 [2023-08-04 03:07:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 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 03:07:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 407 [2023-08-04 03:07:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:56,285 INFO L124 PetriNetUnfolderBase]: 130176/162625 cut-off events. [2023-08-04 03:07:56,286 INFO L125 PetriNetUnfolderBase]: For 19674/19674 co-relation queries the response was YES. [2023-08-04 03:07:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332193 conditions, 162625 events. 130176/162625 cut-off events. For 19674/19674 co-relation queries the response was YES. Maximal size of possible extension queue 3493. Compared 874604 event pairs, 48740 based on Foata normal form. 0/102542 useless extension candidates. Maximal degree in co-relation 105954. Up to 156055 conditions per place. [2023-08-04 03:07:56,911 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 32 selfloop transitions, 5 changer transitions 31/77 dead transitions. [2023-08-04 03:07:56,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 370 flow [2023-08-04 03:07:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:07:56,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:07:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 937 transitions. [2023-08-04 03:07:56,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46044226044226044 [2023-08-04 03:07:56,914 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 937 transitions. [2023-08-04 03:07:56,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 937 transitions. [2023-08-04 03:07:56,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:56,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 937 transitions. [2023-08-04 03:07:56,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.4) internal successors, (937), 5 states have internal predecessors, (937), 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 03:07:56,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:07:56,920 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:07:56,920 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 228 flow. Second operand 5 states and 937 transitions. [2023-08-04 03:07:56,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 370 flow [2023-08-04 03:07:56,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:07:56,940 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 125 flow [2023-08-04 03:07:56,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=125, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 03:07:56,941 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 03:07:56,941 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 125 flow [2023-08-04 03:07:56,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 175.8) internal successors, (879), 5 states have internal predecessors, (879), 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 03:07:56,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:56,941 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:56,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 03:07:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:57,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:57,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1972329383, now seen corresponding path program 1 times [2023-08-04 03:07:57,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:57,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046778283] [2023-08-04 03:07:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 03:07:57,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:57,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046778283] [2023-08-04 03:07:57,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046778283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:07:57,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:07:57,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:07:57,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852568388] [2023-08-04 03:07:57,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:07:57,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:07:57,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:57,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:07:57,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:07:57,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-04 03:07:57,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 03:07:57,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:57,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-04 03:07:57,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:07:58,626 INFO L124 PetriNetUnfolderBase]: 17633/21735 cut-off events. [2023-08-04 03:07:58,626 INFO L125 PetriNetUnfolderBase]: For 1170/1170 co-relation queries the response was YES. [2023-08-04 03:07:58,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44752 conditions, 21735 events. 17633/21735 cut-off events. For 1170/1170 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 86795 event pairs, 8517 based on Foata normal form. 1/13576 useless extension candidates. Maximal degree in co-relation 19471. Up to 21183 conditions per place. [2023-08-04 03:07:58,745 INFO L140 encePairwiseOnDemand]: 404/407 looper letters, 30 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-04 03:07:58,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 192 flow [2023-08-04 03:07:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:07:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:07:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-08-04 03:07:58,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561834561834562 [2023-08-04 03:07:58,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-08-04 03:07:58,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-08-04 03:07:58,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:07:58,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-08-04 03:07:58,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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 03:07:58,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 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 03:07:58,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 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 03:07:58,751 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 125 flow. Second operand 3 states and 557 transitions. [2023-08-04 03:07:58,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 192 flow [2023-08-04 03:07:58,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 187 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 03:07:58,754 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 119 flow [2023-08-04 03:07:58,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-04 03:07:58,754 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -11 predicate places. [2023-08-04 03:07:58,754 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 119 flow [2023-08-04 03:07:58,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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 03:07:58,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:07:58,755 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:07:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:07:58,755 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:07:58,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:07:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash 213423438, now seen corresponding path program 1 times [2023-08-04 03:07:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:07:58,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715812676] [2023-08-04 03:07:58,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:58,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:07:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:58,807 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 03:07:58,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:07:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715812676] [2023-08-04 03:07:58,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715812676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:07:58,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185663936] [2023-08-04 03:07:58,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:07:58,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:07:58,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:07:58,817 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 03:07:58,819 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 03:07:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:07:58,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:07:58,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:07:58,907 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 03:07:58,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:07:58,924 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 03:07:58,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185663936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:07:58,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:07:58,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:07:58,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126556397] [2023-08-04 03:07:58,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:07:58,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:07:58,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:07:58,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:07:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:07:58,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 407 [2023-08-04 03:07:58,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 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 03:07:58,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:07:58,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 407 [2023-08-04 03:07:58,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:00,010 INFO L124 PetriNetUnfolderBase]: 14117/17202 cut-off events. [2023-08-04 03:08:00,010 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-04 03:08:00,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35221 conditions, 17202 events. 14117/17202 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 64282 event pairs, 5061 based on Foata normal form. 3/10638 useless extension candidates. Maximal degree in co-relation 25827. Up to 16755 conditions per place. [2023-08-04 03:08:00,074 INFO L140 encePairwiseOnDemand]: 404/407 looper letters, 32 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-04 03:08:00,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 200 flow [2023-08-04 03:08:00,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:08:00,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:08:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-08-04 03:08:00,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44963144963144963 [2023-08-04 03:08:00,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-08-04 03:08:00,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-08-04 03:08:00,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:00,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-08-04 03:08:00,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 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 03:08:00,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 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 03:08:00,080 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 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 03:08:00,080 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 119 flow. Second operand 4 states and 732 transitions. [2023-08-04 03:08:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 200 flow [2023-08-04 03:08:00,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:08:00,082 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 116 flow [2023-08-04 03:08:00,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-04 03:08:00,082 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-08-04 03:08:00,083 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 116 flow [2023-08-04 03:08:00,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 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 03:08:00,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:00,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:00,107 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 03:08:00,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:00,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:00,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -173249260, now seen corresponding path program 1 times [2023-08-04 03:08:00,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:00,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700763996] [2023-08-04 03:08:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:00,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:00,355 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 03:08:00,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:00,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700763996] [2023-08-04 03:08:00,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700763996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:00,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674326699] [2023-08-04 03:08:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:00,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:00,358 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 03:08:00,360 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 03:08:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:00,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:08:00,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:00,445 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 03:08:00,445 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674326699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:00,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:00,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:08:00,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124986372] [2023-08-04 03:08:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:00,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:08:00,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 407 [2023-08-04 03:08:00,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 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 03:08:00,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:00,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 407 [2023-08-04 03:08:00,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:01,345 INFO L124 PetriNetUnfolderBase]: 13685/16941 cut-off events. [2023-08-04 03:08:01,346 INFO L125 PetriNetUnfolderBase]: For 545/545 co-relation queries the response was YES. [2023-08-04 03:08:01,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 16941 events. 13685/16941 cut-off events. For 545/545 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 69792 event pairs, 1987 based on Foata normal form. 0/10608 useless extension candidates. Maximal degree in co-relation 14437. Up to 15510 conditions per place. [2023-08-04 03:08:01,417 INFO L140 encePairwiseOnDemand]: 403/407 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-04 03:08:01,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 58 transitions, 256 flow [2023-08-04 03:08:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:08:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:08:01,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-08-04 03:08:01,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4520884520884521 [2023-08-04 03:08:01,420 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-08-04 03:08:01,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-08-04 03:08:01,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:01,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-08-04 03:08:01,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 03:08:01,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:08:01,425 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:08:01,425 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 116 flow. Second operand 5 states and 920 transitions. [2023-08-04 03:08:01,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 58 transitions, 256 flow [2023-08-04 03:08:01,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 249 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:08:01,426 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 128 flow [2023-08-04 03:08:01,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-04 03:08:01,427 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -10 predicate places. [2023-08-04 03:08:01,427 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 128 flow [2023-08-04 03:08:01,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 176.8) internal successors, (884), 5 states have internal predecessors, (884), 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 03:08:01,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:01,428 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:01,432 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 03:08:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:01,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:01,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 693192801, now seen corresponding path program 1 times [2023-08-04 03:08:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:01,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203611784] [2023-08-04 03:08:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 03:08:01,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:01,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203611784] [2023-08-04 03:08:01,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203611784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:01,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:08:01,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:08:01,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502341075] [2023-08-04 03:08:01,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:01,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:01,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:08:01,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-04 03:08:01,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 03:08:01,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:01,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-04 03:08:01,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:02,646 INFO L124 PetriNetUnfolderBase]: 13097/16128 cut-off events. [2023-08-04 03:08:02,646 INFO L125 PetriNetUnfolderBase]: For 742/742 co-relation queries the response was YES. [2023-08-04 03:08:02,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33079 conditions, 16128 events. 13097/16128 cut-off events. For 742/742 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 65478 event pairs, 6325 based on Foata normal form. 9/10088 useless extension candidates. Maximal degree in co-relation 14062. Up to 15368 conditions per place. [2023-08-04 03:08:02,730 INFO L140 encePairwiseOnDemand]: 404/407 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 03:08:02,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 213 flow [2023-08-04 03:08:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:02,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-04 03:08:02,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2023-08-04 03:08:02,732 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-04 03:08:02,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-04 03:08:02,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:02,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-04 03:08:02,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 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 03:08:02,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 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 03:08:02,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 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 03:08:02,735 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 128 flow. Second operand 3 states and 561 transitions. [2023-08-04 03:08:02,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 213 flow [2023-08-04 03:08:02,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 45 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:08:02,736 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 126 flow [2023-08-04 03:08:02,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-04 03:08:02,737 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-04 03:08:02,737 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 126 flow [2023-08-04 03:08:02,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 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 03:08:02,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:02,737 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:02,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:08:02,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:02,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2113904225, now seen corresponding path program 1 times [2023-08-04 03:08:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31937908] [2023-08-04 03:08:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:02,772 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 03:08:02,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31937908] [2023-08-04 03:08:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31937908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018697329] [2023-08-04 03:08:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:02,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:02,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:02,795 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 03:08:02,796 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 03:08:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:02,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:08:02,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:02,889 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 03:08:02,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:08:02,908 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 03:08:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018697329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:08:02,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:08:02,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:08:02,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115370066] [2023-08-04 03:08:02,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:08:02,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:02,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:02,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:02,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 407 [2023-08-04 03:08:02,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 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 03:08:02,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:02,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 407 [2023-08-04 03:08:02,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:03,851 INFO L124 PetriNetUnfolderBase]: 10613/12969 cut-off events. [2023-08-04 03:08:03,851 INFO L125 PetriNetUnfolderBase]: For 643/643 co-relation queries the response was YES. [2023-08-04 03:08:03,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26626 conditions, 12969 events. 10613/12969 cut-off events. For 643/643 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 50664 event pairs, 3823 based on Foata normal form. 27/8054 useless extension candidates. Maximal degree in co-relation 11713. Up to 11786 conditions per place. [2023-08-04 03:08:03,932 INFO L140 encePairwiseOnDemand]: 404/407 looper letters, 41 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 03:08:03,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 241 flow [2023-08-04 03:08:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:08:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:08:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 740 transitions. [2023-08-04 03:08:03,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-04 03:08:03,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 740 transitions. [2023-08-04 03:08:03,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 740 transitions. [2023-08-04 03:08:03,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:03,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 740 transitions. [2023-08-04 03:08:03,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 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 03:08:03,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 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 03:08:03,940 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 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 03:08:03,941 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 126 flow. Second operand 4 states and 740 transitions. [2023-08-04 03:08:03,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 241 flow [2023-08-04 03:08:03,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 03:08:03,942 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 123 flow [2023-08-04 03:08:03,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-04 03:08:03,943 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -8 predicate places. [2023-08-04 03:08:03,943 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 123 flow [2023-08-04 03:08:03,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 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 03:08:03,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:03,944 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:03,953 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 03:08:04,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:04,150 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 03:08:04,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash 818050428, now seen corresponding path program 1 times [2023-08-04 03:08:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:04,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639011222] [2023-08-04 03:08:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:04,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:04,255 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 03:08:04,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:04,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639011222] [2023-08-04 03:08:04,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639011222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:04,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71146230] [2023-08-04 03:08:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:04,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:04,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:04,257 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 03:08:04,260 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 03:08:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:04,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 03:08:04,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:04,371 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 03:08:04,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:04,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71146230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:04,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:04,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 03:08:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761027054] [2023-08-04 03:08:04,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:08:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:08:04,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 03:08:04,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 407 [2023-08-04 03:08:04,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 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 03:08:04,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:04,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 407 [2023-08-04 03:08:04,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:05,057 INFO L124 PetriNetUnfolderBase]: 8561/10431 cut-off events. [2023-08-04 03:08:05,057 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-08-04 03:08:05,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21604 conditions, 10431 events. 8561/10431 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37454 event pairs, 460 based on Foata normal form. 324/6677 useless extension candidates. Maximal degree in co-relation 11767. Up to 4428 conditions per place. [2023-08-04 03:08:05,083 INFO L140 encePairwiseOnDemand]: 404/407 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-04 03:08:05,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 293 flow [2023-08-04 03:08:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 03:08:05,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 03:08:05,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 927 transitions. [2023-08-04 03:08:05,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45552825552825554 [2023-08-04 03:08:05,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 927 transitions. [2023-08-04 03:08:05,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 927 transitions. [2023-08-04 03:08:05,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:05,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 927 transitions. [2023-08-04 03:08:05,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 185.4) internal successors, (927), 5 states have internal predecessors, (927), 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 03:08:05,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:08:05,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 407.0) internal successors, (2442), 6 states have internal predecessors, (2442), 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 03:08:05,090 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 123 flow. Second operand 5 states and 927 transitions. [2023-08-04 03:08:05,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 293 flow [2023-08-04 03:08:05,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:08:05,096 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2023-08-04 03:08:05,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2023-08-04 03:08:05,097 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -9 predicate places. [2023-08-04 03:08:05,097 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2023-08-04 03:08:05,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 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 03:08:05,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 03:08:05,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 03:08:05,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 03:08:05,104 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 03:08:05,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:05,302 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:05,302 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 03:08:05,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,525 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 03:08:05,526 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:05,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31992 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 03:08:05,543 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,552 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:08:05,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,553 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 223 transitions, 536 flow [2023-08-04 03:08:05,853 INFO L124 PetriNetUnfolderBase]: 855/4026 cut-off events. [2023-08-04 03:08:05,853 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 03:08:05,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4700 conditions, 4026 events. 855/4026 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 31992 event pairs, 33 based on Foata normal form. 0/3415 useless extension candidates. Maximal degree in co-relation 2382. Up to 192 conditions per place. [2023-08-04 03:08:05,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 10168 [2023-08-04 03:08:10,546 INFO L134 LiptonReduction]: Checked pairs total: 22285 [2023-08-04 03:08:10,546 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-04 03:08:10,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:08:10,549 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;@7dba2126, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:08:10,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:08:10,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:08:10,553 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-04 03:08:10,553 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:08:10,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:10,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:10,553 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:10,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:10,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1530915532, now seen corresponding path program 1 times [2023-08-04 03:08:10,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:10,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792485114] [2023-08-04 03:08:10,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:10,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:10,598 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 03:08:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792485114] [2023-08-04 03:08:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792485114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:10,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:08:10,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 03:08:10,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098258384] [2023-08-04 03:08:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:10,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:10,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:08:10,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:08:10,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 03:08:10,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:10,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:08:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:21,392 INFO L124 PetriNetUnfolderBase]: 129355/160787 cut-off events. [2023-08-04 03:08:21,392 INFO L125 PetriNetUnfolderBase]: For 21102/21102 co-relation queries the response was YES. [2023-08-04 03:08:21,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329112 conditions, 160787 events. 129355/160787 cut-off events. For 21102/21102 co-relation queries the response was YES. Maximal size of possible extension queue 3450. Compared 843257 event pairs, 61282 based on Foata normal form. 0/101053 useless extension candidates. Maximal degree in co-relation 105472. Up to 154988 conditions per place. [2023-08-04 03:08:22,222 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 57 selfloop transitions, 2 changer transitions 3/72 dead transitions. [2023-08-04 03:08:22,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 352 flow [2023-08-04 03:08:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 586 transitions. [2023-08-04 03:08:22,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48469809760132343 [2023-08-04 03:08:22,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 586 transitions. [2023-08-04 03:08:22,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 586 transitions. [2023-08-04 03:08:22,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:22,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 586 transitions. [2023-08-04 03:08:22,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.33333333333334) internal successors, (586), 3 states have internal predecessors, (586), 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 03:08:22,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:22,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:22,227 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 228 flow. Second operand 3 states and 586 transitions. [2023-08-04 03:08:22,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 352 flow [2023-08-04 03:08:22,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:08:22,236 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 220 flow [2023-08-04 03:08:22,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-08-04 03:08:22,237 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 03:08:22,237 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 220 flow [2023-08-04 03:08:22,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 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 03:08:22,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:22,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:22,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 03:08:22,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:22,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1607138714, now seen corresponding path program 1 times [2023-08-04 03:08:22,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:22,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644931149] [2023-08-04 03:08:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:22,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:22,261 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 03:08:22,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:22,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644931149] [2023-08-04 03:08:22,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644931149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:22,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551210354] [2023-08-04 03:08:22,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:22,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:22,263 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 03:08:22,284 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 03:08:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:22,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:08:22,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:22,342 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 03:08:22,342 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:22,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551210354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:22,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:22,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:08:22,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773571410] [2023-08-04 03:08:22,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:22,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:22,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:22,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:08:22,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 03:08:22,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:22,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:08:22,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:32,399 INFO L124 PetriNetUnfolderBase]: 128541/159664 cut-off events. [2023-08-04 03:08:32,399 INFO L125 PetriNetUnfolderBase]: For 18189/18189 co-relation queries the response was YES. [2023-08-04 03:08:32,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326444 conditions, 159664 events. 128541/159664 cut-off events. For 18189/18189 co-relation queries the response was YES. Maximal size of possible extension queue 3523. Compared 855026 event pairs, 60960 based on Foata normal form. 0/100152 useless extension candidates. Maximal degree in co-relation 190731. Up to 153761 conditions per place. [2023-08-04 03:08:33,263 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 62 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 03:08:33,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 364 flow [2023-08-04 03:08:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-08-04 03:08:33,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2023-08-04 03:08:33,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-08-04 03:08:33,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-08-04 03:08:33,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:33,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-08-04 03:08:33,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 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 03:08:33,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:33,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:33,268 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 220 flow. Second operand 3 states and 589 transitions. [2023-08-04 03:08:33,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 364 flow [2023-08-04 03:08:33,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 350 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 03:08:33,315 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 218 flow [2023-08-04 03:08:33,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-08-04 03:08:33,316 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -2 predicate places. [2023-08-04 03:08:33,316 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 218 flow [2023-08-04 03:08:33,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 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 03:08:33,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:33,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:08:33,323 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 03:08:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:33,522 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:33,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash -286160899, now seen corresponding path program 1 times [2023-08-04 03:08:33,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:33,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990958211] [2023-08-04 03:08:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:33,575 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 03:08:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990958211] [2023-08-04 03:08:33,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990958211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:33,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873389249] [2023-08-04 03:08:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:33,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:33,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:33,578 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 03:08:33,580 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 03:08:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:33,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:08:33,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:33,664 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 03:08:33,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:33,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873389249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:33,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:33,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:08:33,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596362142] [2023-08-04 03:08:33,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:33,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:33,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:33,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:33,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:08:33,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 03:08:33,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:33,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:08:33,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:43,108 INFO L124 PetriNetUnfolderBase]: 128423/160284 cut-off events. [2023-08-04 03:08:43,108 INFO L125 PetriNetUnfolderBase]: For 7194/7194 co-relation queries the response was YES. [2023-08-04 03:08:43,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326912 conditions, 160284 events. 128423/160284 cut-off events. For 7194/7194 co-relation queries the response was YES. Maximal size of possible extension queue 3949. Compared 875186 event pairs, 57964 based on Foata normal form. 0/101199 useless extension candidates. Maximal degree in co-relation 109321. Up to 150557 conditions per place. [2023-08-04 03:08:44,046 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 66 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 03:08:44,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 376 flow [2023-08-04 03:08:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:44,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2023-08-04 03:08:44,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48966087675765096 [2023-08-04 03:08:44,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2023-08-04 03:08:44,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2023-08-04 03:08:44,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:44,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2023-08-04 03:08:44,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 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 03:08:44,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:44,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:44,056 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 218 flow. Second operand 3 states and 592 transitions. [2023-08-04 03:08:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 376 flow [2023-08-04 03:08:44,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:08:44,062 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 228 flow [2023-08-04 03:08:44,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-08-04 03:08:44,064 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 03:08:44,064 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 228 flow [2023-08-04 03:08:44,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 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 03:08:44,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:44,065 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] [2023-08-04 03:08:44,068 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 03:08:44,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:44,269 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:44,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash -739072049, now seen corresponding path program 1 times [2023-08-04 03:08:44,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:44,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340213505] [2023-08-04 03:08:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:44,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:44,297 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 03:08:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340213505] [2023-08-04 03:08:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340213505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368069684] [2023-08-04 03:08:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:44,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:44,298 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 03:08:44,300 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 03:08:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:44,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:08:44,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:44,377 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 03:08:44,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368069684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:44,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:44,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:08:44,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843971437] [2023-08-04 03:08:44,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:44,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:44,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:44,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:44,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:44,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:08:44,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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 03:08:44,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:44,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:08:44,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:08:53,429 INFO L124 PetriNetUnfolderBase]: 117593/147402 cut-off events. [2023-08-04 03:08:53,430 INFO L125 PetriNetUnfolderBase]: For 8602/8602 co-relation queries the response was YES. [2023-08-04 03:08:53,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303531 conditions, 147402 events. 117593/147402 cut-off events. For 8602/8602 co-relation queries the response was YES. Maximal size of possible extension queue 3583. Compared 810305 event pairs, 51940 based on Foata normal form. 0/94305 useless extension candidates. Maximal degree in co-relation 105729. Up to 121511 conditions per place. [2023-08-04 03:08:54,249 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 74 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-08-04 03:08:54,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 86 transitions, 431 flow [2023-08-04 03:08:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:08:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:08:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 03:08:54,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49545078577336643 [2023-08-04 03:08:54,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 03:08:54,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 03:08:54,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:08:54,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 03:08:54,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 03:08:54,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:54,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:08:54,254 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 228 flow. Second operand 3 states and 599 transitions. [2023-08-04 03:08:54,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 86 transitions, 431 flow [2023-08-04 03:08:54,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 429 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:08:54,261 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 238 flow [2023-08-04 03:08:54,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-04 03:08:54,263 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 03:08:54,263 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 238 flow [2023-08-04 03:08:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 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 03:08:54,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:08:54,263 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, 1, 1, 1] [2023-08-04 03:08:54,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 03:08:54,468 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,SelfDestructingSolverStorable12 [2023-08-04 03:08:54,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:08:54,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:08:54,469 INFO L85 PathProgramCache]: Analyzing trace with hash 603906429, now seen corresponding path program 1 times [2023-08-04 03:08:54,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:08:54,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852802764] [2023-08-04 03:08:54,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:54,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:08:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:54,500 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 03:08:54,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:08:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852802764] [2023-08-04 03:08:54,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852802764] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:08:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281109785] [2023-08-04 03:08:54,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:08:54,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:08:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:08:54,502 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 03:08:54,504 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 03:08:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:08:54,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:08:54,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:08:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:08:54,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:08:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281109785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:08:54,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:08:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 03:08:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626241690] [2023-08-04 03:08:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:08:54,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:08:54,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:08:54,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:08:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:08:54,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:08:54,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 03:08:54,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:08:54,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:08:54,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:03,124 INFO L124 PetriNetUnfolderBase]: 112001/141522 cut-off events. [2023-08-04 03:09:03,125 INFO L125 PetriNetUnfolderBase]: For 14830/14830 co-relation queries the response was YES. [2023-08-04 03:09:03,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299050 conditions, 141522 events. 112001/141522 cut-off events. For 14830/14830 co-relation queries the response was YES. Maximal size of possible extension queue 3120. Compared 783601 event pairs, 47566 based on Foata normal form. 0/93789 useless extension candidates. Maximal degree in co-relation 110047. Up to 106991 conditions per place. [2023-08-04 03:09:03,996 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 75 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 03:09:03,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 443 flow [2023-08-04 03:09:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:09:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:09:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 03:09:03,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49545078577336643 [2023-08-04 03:09:03,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 03:09:03,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 03:09:03,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:03,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 03:09:04,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 03:09:04,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:09:04,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:09:04,001 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 238 flow. Second operand 3 states and 599 transitions. [2023-08-04 03:09:04,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 443 flow [2023-08-04 03:09:04,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:09:04,126 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 248 flow [2023-08-04 03:09:04,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2023-08-04 03:09:04,127 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-04 03:09:04,127 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 248 flow [2023-08-04 03:09:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 03:09:04,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:04,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:04,133 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 03:09:04,329 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,SelfDestructingSolverStorable13 [2023-08-04 03:09:04,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:09:04,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -180096055, now seen corresponding path program 1 times [2023-08-04 03:09:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:04,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606711513] [2023-08-04 03:09:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:04,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 03:09:04,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606711513] [2023-08-04 03:09:04,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606711513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:04,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010331018] [2023-08-04 03:09:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:04,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:04,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:04,393 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 03:09:04,429 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 03:09:04,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:04,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 03:09:04,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:04,522 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 03:09:04,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 03:09:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010331018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:09:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 03:09:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 03:09:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944915710] [2023-08-04 03:09:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:09:04,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:09:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:09:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:09:04,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 403 [2023-08-04 03:09:04,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 03:09:04,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:04,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 403 [2023-08-04 03:09:04,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:13,408 INFO L124 PetriNetUnfolderBase]: 112066/142094 cut-off events. [2023-08-04 03:09:13,409 INFO L125 PetriNetUnfolderBase]: For 16912/16912 co-relation queries the response was YES. [2023-08-04 03:09:13,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305181 conditions, 142094 events. 112066/142094 cut-off events. For 16912/16912 co-relation queries the response was YES. Maximal size of possible extension queue 2992. Compared 790054 event pairs, 54515 based on Foata normal form. 0/96274 useless extension candidates. Maximal degree in co-relation 155619. Up to 121678 conditions per place. [2023-08-04 03:09:14,270 INFO L140 encePairwiseOnDemand]: 400/403 looper letters, 76 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 03:09:14,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 455 flow [2023-08-04 03:09:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:09:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:09:14,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 599 transitions. [2023-08-04 03:09:14,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49545078577336643 [2023-08-04 03:09:14,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 599 transitions. [2023-08-04 03:09:14,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 599 transitions. [2023-08-04 03:09:14,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:14,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 599 transitions. [2023-08-04 03:09:14,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 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 03:09:14,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:09:14,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 403.0) internal successors, (1612), 4 states have internal predecessors, (1612), 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 03:09:14,276 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 248 flow. Second operand 3 states and 599 transitions. [2023-08-04 03:09:14,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 455 flow [2023-08-04 03:09:16,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:09:16,016 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 258 flow [2023-08-04 03:09:16,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2023-08-04 03:09:16,017 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 03:09:16,017 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 258 flow [2023-08-04 03:09:16,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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 03:09:16,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:16,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:16,025 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 03:09:16,222 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,SelfDestructingSolverStorable14 [2023-08-04 03:09:16,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:09:16,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1859488784, now seen corresponding path program 1 times [2023-08-04 03:09:16,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:16,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129902931] [2023-08-04 03:09:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:16,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:16,305 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 03:09:16,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129902931] [2023-08-04 03:09:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129902931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273343106] [2023-08-04 03:09:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:16,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:16,309 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 03:09:16,309 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 03:09:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:16,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:09:16,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:16,411 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 03:09:16,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:09:16,425 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 03:09:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273343106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:09:16,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:09:16,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:09:16,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364424009] [2023-08-04 03:09:16,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:09:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:09:16,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 03:09:16,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 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 03:09:16,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:16,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 03:09:16,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:09:24,754 INFO L124 PetriNetUnfolderBase]: 105430/133592 cut-off events. [2023-08-04 03:09:24,754 INFO L125 PetriNetUnfolderBase]: For 15139/15139 co-relation queries the response was YES. [2023-08-04 03:09:25,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288514 conditions, 133592 events. 105430/133592 cut-off events. For 15139/15139 co-relation queries the response was YES. Maximal size of possible extension queue 3017. Compared 737508 event pairs, 40990 based on Foata normal form. 3/90955 useless extension candidates. Maximal degree in co-relation 238341. Up to 128318 conditions per place. [2023-08-04 03:09:25,965 INFO L140 encePairwiseOnDemand]: 399/403 looper letters, 65 selfloop transitions, 3 changer transitions 1/79 dead transitions. [2023-08-04 03:09:25,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 412 flow [2023-08-04 03:09:25,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:09:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:09:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 761 transitions. [2023-08-04 03:09:25,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47208436724565755 [2023-08-04 03:09:25,981 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 761 transitions. [2023-08-04 03:09:25,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 761 transitions. [2023-08-04 03:09:25,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:09:25,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 761 transitions. [2023-08-04 03:09:25,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.25) internal successors, (761), 4 states have internal predecessors, (761), 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 03:09:26,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 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 03:09:26,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 403.0) internal successors, (2015), 5 states have internal predecessors, (2015), 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 03:09:26,002 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 258 flow. Second operand 4 states and 761 transitions. [2023-08-04 03:09:26,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 412 flow [2023-08-04 03:09:28,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:09:28,169 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 270 flow [2023-08-04 03:09:28,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=403, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-04 03:09:28,169 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 03:09:28,170 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 270 flow [2023-08-04 03:09:28,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 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 03:09:28,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:09:28,170 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:09:28,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 03:09:28,374 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,SelfDestructingSolverStorable15 [2023-08-04 03:09:28,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:09:28,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:09:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 364088390, now seen corresponding path program 1 times [2023-08-04 03:09:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:09:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139213283] [2023-08-04 03:09:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:09:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:09:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:09:28,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139213283] [2023-08-04 03:09:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139213283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:09:28,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264740462] [2023-08-04 03:09:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:09:28,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:09:28,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:09:28,437 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 03:09:28,439 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 03:09:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:09:28,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:09:28,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:09:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:09:28,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:09:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 03:09:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264740462] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:09:28,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:09:28,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 03:09:28,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293388079] [2023-08-04 03:09:28,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:09:28,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:09:28,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:09:28,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:09:28,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:09:28,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 403 [2023-08-04 03:09:28,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 180.8) internal successors, (904), 5 states have internal predecessors, (904), 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 03:09:28,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:09:28,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 403 [2023-08-04 03:09:28,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand