/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons-eq.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:36:23,335 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:36:23,408 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:36:23,414 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:36:23,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:36:23,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:36:23,415 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:36:23,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:36:23,448 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:36:23,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:36:23,450 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:36:23,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:36:23,452 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:36:23,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:36:23,455 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:36:23,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:36:23,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:36:23,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:36:23,457 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:36:23,457 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:36:23,457 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:36:23,458 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:36:23,458 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:36:23,458 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:36:23,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:36:23,459 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:36:23,459 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:36:23,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:36:23,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:36:23,460 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:36:23,461 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:23,461 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:36:23,461 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:36:23,461 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:36:23,462 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:36:23,463 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:36:23,463 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:36:23,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:36:23,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:36:23,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:36:23,718 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:36:23,718 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:36:23,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons-eq.wvr_bound2.c [2023-08-04 09:36:24,850 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:36:25,049 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:36:25,052 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-prod-cons-eq.wvr_bound2.c [2023-08-04 09:36:25,062 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29cf0831/6962ddf6e2824d19aea9dbf3e92a2b29/FLAG18ee5af7d [2023-08-04 09:36:25,073 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d29cf0831/6962ddf6e2824d19aea9dbf3e92a2b29 [2023-08-04 09:36:25,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:36:25,076 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:36:25,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:25,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:36:25,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:36:25,080 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,081 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e7e224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25, skipping insertion in model container [2023-08-04 09:36:25,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,104 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:36:25,274 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-prod-cons-eq.wvr_bound2.c[4623,4636] [2023-08-04 09:36:25,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:25,288 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:36:25,314 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-prod-cons-eq.wvr_bound2.c[4623,4636] [2023-08-04 09:36:25,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:36:25,326 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:25,326 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:36:25,332 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:36:25,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25 WrapperNode [2023-08-04 09:36:25,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:36:25,334 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:25,334 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:36:25,334 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:36:25,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,351 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,380 INFO L138 Inliner]: procedures = 28, calls = 80, calls flagged for inlining = 26, calls inlined = 32, statements flattened = 454 [2023-08-04 09:36:25,381 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:36:25,382 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:36:25,382 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:36:25,382 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:36:25,390 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,412 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:36:25,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:36:25,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:36:25,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:36:25,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (1/1) ... [2023-08-04 09:36:25,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:36:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:25,455 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 09:36:25,472 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 09:36:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:36:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-04 09:36:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:36:25,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:36:25,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:36:25,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-04 09:36:25,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:36:25,500 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:36:25,500 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:36:25,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:36:25,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:36:25,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:36:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:36:25,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:36:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:36:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:36:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:36:25,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:36:25,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:36:25,505 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 09:36:25,643 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:36:25,644 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:36:26,113 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:36:26,211 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:36:26,212 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-04 09:36:26,214 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:26 BoogieIcfgContainer [2023-08-04 09:36:26,214 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:36:26,216 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:36:26,216 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:36:26,219 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:36:26,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:36:25" (1/3) ... [2023-08-04 09:36:26,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc16488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:26, skipping insertion in model container [2023-08-04 09:36:26,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:36:25" (2/3) ... [2023-08-04 09:36:26,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dc16488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:36:26, skipping insertion in model container [2023-08-04 09:36:26,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:36:26" (3/3) ... [2023-08-04 09:36:26,222 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-prod-cons-eq.wvr_bound2.c [2023-08-04 09:36:26,229 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:36:26,236 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:36:26,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:36:26,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:36:26,346 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:36:26,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,723 INFO L124 PetriNetUnfolderBase]: 141/1030 cut-off events. [2023-08-04 09:36:26,723 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:26,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1030 events. 141/1030 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4827 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 659. Up to 16 conditions per place. [2023-08-04 09:36:26,737 INFO L82 GeneralOperation]: Start removeDead. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:26,769 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:26,933 INFO L124 PetriNetUnfolderBase]: 141/1030 cut-off events. [2023-08-04 09:36:26,933 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:26,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1030 events. 141/1030 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4827 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 659. Up to 16 conditions per place. [2023-08-04 09:36:26,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 13926 [2023-08-04 09:36:38,216 INFO L134 LiptonReduction]: Checked pairs total: 25096 [2023-08-04 09:36:38,216 INFO L136 LiptonReduction]: Total number of compositions: 454 [2023-08-04 09:36:38,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:36:38,234 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;@5904a74e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:38,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:36:38,241 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:38,241 INFO L124 PetriNetUnfolderBase]: 8/48 cut-off events. [2023-08-04 09:36:38,241 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:38,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:38,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:38,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:38,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash 889019974, now seen corresponding path program 1 times [2023-08-04 09:36:38,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:38,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935171345] [2023-08-04 09:36:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:38,606 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 09:36:38,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935171345] [2023-08-04 09:36:38,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935171345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:38,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:36:38,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:36:38,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849839803] [2023-08-04 09:36:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:38,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:38,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:38,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:36:38,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:38,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 67 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:38,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:38,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:38,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:39,374 INFO L124 PetriNetUnfolderBase]: 3923/6319 cut-off events. [2023-08-04 09:36:39,375 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-08-04 09:36:39,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12373 conditions, 6319 events. 3923/6319 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39565 event pairs, 2008 based on Foata normal form. 0/4666 useless extension candidates. Maximal degree in co-relation 10340. Up to 5693 conditions per place. [2023-08-04 09:36:39,415 INFO L140 encePairwiseOnDemand]: 885/889 looper letters, 58 selfloop transitions, 2 changer transitions 2/71 dead transitions. [2023-08-04 09:36:39,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 306 flow [2023-08-04 09:36:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1209 transitions. [2023-08-04 09:36:39,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453318335208099 [2023-08-04 09:36:39,435 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1209 transitions. [2023-08-04 09:36:39,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1209 transitions. [2023-08-04 09:36:39,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:39,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1209 transitions. [2023-08-04 09:36:39,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.0) internal successors, (1209), 3 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,459 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,460 INFO L175 Difference]: Start difference. First operand has 56 places, 67 transitions, 176 flow. Second operand 3 states and 1209 transitions. [2023-08-04 09:36:39,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 306 flow [2023-08-04 09:36:39,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:36:39,469 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 178 flow [2023-08-04 09:36:39,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-08-04 09:36:39,474 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 09:36:39,475 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 178 flow [2023-08-04 09:36:39,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 386.0) internal successors, (1158), 3 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:39,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:39,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:36:39,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:39,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash 463580984, now seen corresponding path program 1 times [2023-08-04 09:36:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:39,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957978829] [2023-08-04 09:36:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:39,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,632 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 09:36:39,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957978829] [2023-08-04 09:36:39,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957978829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889533816] [2023-08-04 09:36:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:39,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:39,639 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 09:36:39,658 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 09:36:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:39,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:39,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:39,785 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 09:36:39,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:39,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889533816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:39,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:39,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:39,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998531036] [2023-08-04 09:36:39,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:39,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:39,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:39,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:39,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:39,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:39,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 387.0) internal successors, (1161), 3 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:39,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:39,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:40,454 INFO L124 PetriNetUnfolderBase]: 3739/6008 cut-off events. [2023-08-04 09:36:40,456 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-04 09:36:40,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11785 conditions, 6008 events. 3739/6008 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37002 event pairs, 2138 based on Foata normal form. 0/4436 useless extension candidates. Maximal degree in co-relation 9756. Up to 5384 conditions per place. [2023-08-04 09:36:40,496 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 61 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 09:36:40,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 318 flow [2023-08-04 09:36:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:40,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1210 transitions. [2023-08-04 09:36:40,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536932883389576 [2023-08-04 09:36:40,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1210 transitions. [2023-08-04 09:36:40,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1210 transitions. [2023-08-04 09:36:40,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:40,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1210 transitions. [2023-08-04 09:36:40,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 403.3333333333333) internal successors, (1210), 3 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,514 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,514 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 178 flow. Second operand 3 states and 1210 transitions. [2023-08-04 09:36:40,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 318 flow [2023-08-04 09:36:40,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 310 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 09:36:40,519 INFO L231 Difference]: Finished difference. Result has 57 places, 65 transitions, 178 flow [2023-08-04 09:36:40,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=57, PETRI_TRANSITIONS=65} [2023-08-04 09:36:40,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2023-08-04 09:36:40,520 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 65 transitions, 178 flow [2023-08-04 09:36:40,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 387.0) internal successors, (1161), 3 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:40,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:40,533 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 09:36:40,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:40,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:40,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash -785898776, now seen corresponding path program 1 times [2023-08-04 09:36:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051963120] [2023-08-04 09:36:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,811 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 09:36:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051963120] [2023-08-04 09:36:40,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051963120] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:40,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180227975] [2023-08-04 09:36:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:40,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:40,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:40,816 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 09:36:40,818 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 09:36:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:40,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:40,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:40,951 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 09:36:40,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180227975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:40,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450164188] [2023-08-04 09:36:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:40,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:40,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 65 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:40,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:40,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:40,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:41,564 INFO L124 PetriNetUnfolderBase]: 3727/5767 cut-off events. [2023-08-04 09:36:41,565 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-08-04 09:36:41,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11639 conditions, 5767 events. 3727/5767 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34594 event pairs, 1712 based on Foata normal form. 0/4210 useless extension candidates. Maximal degree in co-relation 4796. Up to 5112 conditions per place. [2023-08-04 09:36:41,594 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 68 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 09:36:41,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 346 flow [2023-08-04 09:36:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1217 transitions. [2023-08-04 09:36:41,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563179602549681 [2023-08-04 09:36:41,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1217 transitions. [2023-08-04 09:36:41,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1217 transitions. [2023-08-04 09:36:41,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:41,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1217 transitions. [2023-08-04 09:36:41,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 405.6666666666667) internal successors, (1217), 3 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:41,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:41,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:41,607 INFO L175 Difference]: Start difference. First operand has 57 places, 65 transitions, 178 flow. Second operand 3 states and 1217 transitions. [2023-08-04 09:36:41,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 346 flow [2023-08-04 09:36:41,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:41,611 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 182 flow [2023-08-04 09:36:41,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-08-04 09:36:41,611 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2023-08-04 09:36:41,612 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 182 flow [2023-08-04 09:36:41,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 388.0) internal successors, (1164), 3 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:41,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:41,613 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] [2023-08-04 09:36:41,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 09:36:41,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:36:41,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:41,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:41,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1684737377, now seen corresponding path program 1 times [2023-08-04 09:36:41,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:41,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67610131] [2023-08-04 09:36:41,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:41,887 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 09:36:41,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:41,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67610131] [2023-08-04 09:36:41,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67610131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:41,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794786336] [2023-08-04 09:36:41,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:41,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:41,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:41,889 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 09:36:41,914 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 09:36:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:42,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:42,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:42,030 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 09:36:42,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794786336] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:42,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:42,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61758492] [2023-08-04 09:36:42,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:42,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:42,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:42,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:42,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:42,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:42,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:42,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:42,428 INFO L124 PetriNetUnfolderBase]: 2263/3629 cut-off events. [2023-08-04 09:36:42,428 INFO L125 PetriNetUnfolderBase]: For 265/265 co-relation queries the response was YES. [2023-08-04 09:36:42,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7550 conditions, 3629 events. 2263/3629 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20213 event pairs, 1359 based on Foata normal form. 0/2771 useless extension candidates. Maximal degree in co-relation 2946. Up to 2618 conditions per place. [2023-08-04 09:36:42,473 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 72 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:36:42,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 374 flow [2023-08-04 09:36:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1221 transitions. [2023-08-04 09:36:42,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578177727784027 [2023-08-04 09:36:42,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1221 transitions. [2023-08-04 09:36:42,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1221 transitions. [2023-08-04 09:36:42,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:42,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1221 transitions. [2023-08-04 09:36:42,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,487 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,487 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 182 flow. Second operand 3 states and 1221 transitions. [2023-08-04 09:36:42,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 374 flow [2023-08-04 09:36:42,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 83 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:36:42,490 INFO L231 Difference]: Finished difference. Result has 59 places, 66 transitions, 190 flow [2023-08-04 09:36:42,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=66} [2023-08-04 09:36:42,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 09:36:42,491 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 66 transitions, 190 flow [2023-08-04 09:36:42,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 389.0) internal successors, (1167), 3 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:42,492 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] [2023-08-04 09:36:42,503 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 09:36:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:42,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:42,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1389137954, now seen corresponding path program 1 times [2023-08-04 09:36:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161594288] [2023-08-04 09:36:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:42,762 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 09:36:42,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:42,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161594288] [2023-08-04 09:36:42,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161594288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:42,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452028188] [2023-08-04 09:36:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:42,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:42,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:42,764 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 09:36:42,769 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 09:36:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:42,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:42,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:42,905 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 09:36:42,906 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:42,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452028188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:36:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646914277] [2023-08-04 09:36:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:42,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:42,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:42,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:42,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:42,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 66 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 390.3333333333333) internal successors, (1171), 3 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:42,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:42,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:42,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:43,265 INFO L124 PetriNetUnfolderBase]: 1903/3116 cut-off events. [2023-08-04 09:36:43,265 INFO L125 PetriNetUnfolderBase]: For 657/657 co-relation queries the response was YES. [2023-08-04 09:36:43,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6688 conditions, 3116 events. 1903/3116 cut-off events. For 657/657 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 17123 event pairs, 1358 based on Foata normal form. 0/2556 useless extension candidates. Maximal degree in co-relation 2664. Up to 2436 conditions per place. [2023-08-04 09:36:43,283 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 73 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 09:36:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 84 transitions, 384 flow [2023-08-04 09:36:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1221 transitions. [2023-08-04 09:36:43,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578177727784027 [2023-08-04 09:36:43,287 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1221 transitions. [2023-08-04 09:36:43,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1221 transitions. [2023-08-04 09:36:43,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:43,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1221 transitions. [2023-08-04 09:36:43,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:43,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:43,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:43,296 INFO L175 Difference]: Start difference. First operand has 59 places, 66 transitions, 190 flow. Second operand 3 states and 1221 transitions. [2023-08-04 09:36:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 84 transitions, 384 flow [2023-08-04 09:36:43,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 84 transitions, 382 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:43,301 INFO L231 Difference]: Finished difference. Result has 61 places, 67 transitions, 200 flow [2023-08-04 09:36:43,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=58, 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=200, PETRI_PLACES=61, PETRI_TRANSITIONS=67} [2023-08-04 09:36:43,304 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2023-08-04 09:36:43,304 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 67 transitions, 200 flow [2023-08-04 09:36:43,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 390.3333333333333) internal successors, (1171), 3 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:43,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:43,305 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 09:36:43,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:36:43,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:43,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:43,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:43,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1586292539, now seen corresponding path program 1 times [2023-08-04 09:36:43,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:43,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209169542] [2023-08-04 09:36:43,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:43,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:43,600 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 09:36:43,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209169542] [2023-08-04 09:36:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209169542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550096770] [2023-08-04 09:36:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:43,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:43,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:43,605 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 09:36:43,607 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 09:36:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:43,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:36:43,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:43,750 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 09:36:43,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:36:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550096770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:36:43,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:36:43,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:36:43,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393084229] [2023-08-04 09:36:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:36:43,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:36:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:36:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:43,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 382 out of 889 [2023-08-04 09:36:43,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 67 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 391.6666666666667) internal successors, (1175), 3 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:43,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:43,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 382 of 889 [2023-08-04 09:36:43,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:44,116 INFO L124 PetriNetUnfolderBase]: 1889/3090 cut-off events. [2023-08-04 09:36:44,116 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2023-08-04 09:36:44,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6698 conditions, 3090 events. 1889/3090 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16944 event pairs, 1547 based on Foata normal form. 0/2562 useless extension candidates. Maximal degree in co-relation 5303. Up to 2795 conditions per place. [2023-08-04 09:36:44,131 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 68 selfloop transitions, 2 changer transitions 2/81 dead transitions. [2023-08-04 09:36:44,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 81 transitions, 372 flow [2023-08-04 09:36:44,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:36:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:36:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1217 transitions. [2023-08-04 09:36:44,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563179602549681 [2023-08-04 09:36:44,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1217 transitions. [2023-08-04 09:36:44,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1217 transitions. [2023-08-04 09:36:44,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:44,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1217 transitions. [2023-08-04 09:36:44,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 405.6666666666667) internal successors, (1217), 3 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,144 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 889.0) internal successors, (3556), 4 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,144 INFO L175 Difference]: Start difference. First operand has 61 places, 67 transitions, 200 flow. Second operand 3 states and 1217 transitions. [2023-08-04 09:36:44,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 81 transitions, 372 flow [2023-08-04 09:36:44,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 81 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:44,153 INFO L231 Difference]: Finished difference. Result has 63 places, 66 transitions, 202 flow [2023-08-04 09:36:44,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=66} [2023-08-04 09:36:44,155 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2023-08-04 09:36:44,155 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 66 transitions, 202 flow [2023-08-04 09:36:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 391.6666666666667) internal successors, (1175), 3 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:44,156 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 09:36:44,165 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 09:36:44,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:44,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:36:44,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash 347950581, now seen corresponding path program 1 times [2023-08-04 09:36:44,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:44,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309591595] [2023-08-04 09:36:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:44,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:44,468 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 09:36:44,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:36:44,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309591595] [2023-08-04 09:36:44,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309591595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:36:44,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8987299] [2023-08-04 09:36:44,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:44,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:44,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:36:44,470 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 09:36:44,472 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 09:36:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:36:44,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:36:44,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:36:44,651 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 09:36:44,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:36:44,668 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 09:36:44,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8987299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:36:44,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:36:44,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:36:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620222604] [2023-08-04 09:36:44,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:36:44,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:36:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:36:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:36:44,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:36:44,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 381 out of 889 [2023-08-04 09:36:44,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 66 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 388.4) internal successors, (1942), 5 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:36:44,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 381 of 889 [2023-08-04 09:36:44,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:36:44,742 INFO L124 PetriNetUnfolderBase]: 15/35 cut-off events. [2023-08-04 09:36:44,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 35 events. 15/35 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 4/31 useless extension candidates. Maximal degree in co-relation 75. Up to 16 conditions per place. [2023-08-04 09:36:44,742 INFO L140 encePairwiseOnDemand]: 886/889 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2023-08-04 09:36:44,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 25 transitions, 104 flow [2023-08-04 09:36:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:36:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:36:44,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1550 transitions. [2023-08-04 09:36:44,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358830146231721 [2023-08-04 09:36:44,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1550 transitions. [2023-08-04 09:36:44,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1550 transitions. [2023-08-04 09:36:44,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:36:44,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1550 transitions. [2023-08-04 09:36:44,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 387.5) internal successors, (1550), 4 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 889.0) internal successors, (4445), 5 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,768 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 889.0) internal successors, (4445), 5 states have internal predecessors, (4445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,768 INFO L175 Difference]: Start difference. First operand has 63 places, 66 transitions, 202 flow. Second operand 4 states and 1550 transitions. [2023-08-04 09:36:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 25 transitions, 104 flow [2023-08-04 09:36:44,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:36:44,769 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 09:36:44,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=889, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 09:36:44,770 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -30 predicate places. [2023-08-04 09:36:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 09:36:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 388.4) internal successors, (1942), 5 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:36:44,773 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:36:44,785 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 09:36:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:36:44,979 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:44,981 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:36:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,097 INFO L124 PetriNetUnfolderBase]: 141/1030 cut-off events. [2023-08-04 09:36:45,098 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:45,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1030 events. 141/1030 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4827 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 659. Up to 16 conditions per place. [2023-08-04 09:36:45,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,107 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:45,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 390 places, 435 transitions, 912 flow [2023-08-04 09:36:45,209 INFO L124 PetriNetUnfolderBase]: 141/1030 cut-off events. [2023-08-04 09:36:45,210 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:36:45,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1091 conditions, 1030 events. 141/1030 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4827 event pairs, 0 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 659. Up to 16 conditions per place. [2023-08-04 09:36:45,227 INFO L119 LiptonReduction]: Number of co-enabled transitions 13926 [2023-08-04 09:36:55,971 INFO L134 LiptonReduction]: Checked pairs total: 25473 [2023-08-04 09:36:55,971 INFO L136 LiptonReduction]: Total number of compositions: 457 [2023-08-04 09:36:55,973 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:36:55,973 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;@5904a74e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:36:55,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:36:55,979 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:36:55,979 INFO L124 PetriNetUnfolderBase]: 9/47 cut-off events. [2023-08-04 09:36:55,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:36:55,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:36:55,979 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:36:55,979 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 09:36:55,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:36:55,980 INFO L85 PathProgramCache]: Analyzing trace with hash 906397534, now seen corresponding path program 1 times [2023-08-04 09:36:55,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:36:55,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112161137] [2023-08-04 09:36:55,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:36:55,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:36:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:56,074 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:36:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:36:56,141 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:36:56,141 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:36:56,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:36:56,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:36:56,142 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:36:56,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:36:56,142 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:36:56,142 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:36:56,143 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:36:56,143 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:36:56,192 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:36:56,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:57,120 INFO L124 PetriNetUnfolderBase]: 1002/5120 cut-off events. [2023-08-04 09:36:57,120 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:36:57,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5794 conditions, 5120 events. 1002/5120 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42742 event pairs, 33 based on Foata normal form. 0/4362 useless extension candidates. Maximal degree in co-relation 3185. Up to 192 conditions per place. [2023-08-04 09:36:57,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:57,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:57,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:36:57,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:57,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 465 places, 525 transitions, 1140 flow [2023-08-04 09:36:58,052 INFO L124 PetriNetUnfolderBase]: 1002/5120 cut-off events. [2023-08-04 09:36:58,052 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:36:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5794 conditions, 5120 events. 1002/5120 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42742 event pairs, 33 based on Foata normal form. 0/4362 useless extension candidates. Maximal degree in co-relation 3185. Up to 192 conditions per place. [2023-08-04 09:36:58,283 INFO L119 LiptonReduction]: Number of co-enabled transitions 43152 [2023-08-04 09:37:08,964 INFO L134 LiptonReduction]: Checked pairs total: 149012 [2023-08-04 09:37:08,965 INFO L136 LiptonReduction]: Total number of compositions: 515 [2023-08-04 09:37:08,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:37:08,967 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;@5904a74e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:37:08,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:37:08,971 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:37:08,971 INFO L124 PetriNetUnfolderBase]: 8/49 cut-off events. [2023-08-04 09:37:08,971 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:37:08,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:37:08,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:37:08,972 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:37:08,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:37:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash -170653652, now seen corresponding path program 1 times [2023-08-04 09:37:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:37:08,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369117746] [2023-08-04 09:37:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:37:08,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:37:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:37:09,024 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 09:37:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:37:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369117746] [2023-08-04 09:37:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369117746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:37:09,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:37:09,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:37:09,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460835681] [2023-08-04 09:37:09,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:37:09,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:37:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:37:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:37:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:37:09,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 449 out of 1040 [2023-08-04 09:37:09,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 453.0) internal successors, (1359), 3 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:37:09,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:37:09,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 449 of 1040 [2023-08-04 09:37:09,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand