/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:28:07,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:28:07,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:28:07,411 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:28:07,411 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:28:07,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:28:07,412 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:28:07,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:28:07,443 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:28:07,447 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:28:07,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:28:07,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:28:07,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:28:07,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:28:07,450 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:28:07,450 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:28:07,450 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:28:07,450 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:28:07,450 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:28:07,451 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:28:07,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:28:07,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:28:07,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:28:07,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:28:07,452 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:28:07,453 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:28:07,453 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:28:07,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:28:07,454 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:28:07,454 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:28:07,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:28:07,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:28:07,455 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:28:07,455 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:28:07,455 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:28:07,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:28:07,456 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:28:07,456 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:28:07,456 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:28:07,456 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:28:07,456 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:28:07,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:28:07,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:28:07,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:28:07,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:28:07,715 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:28:07,715 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:28:07,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 15:28:08,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:28:09,063 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:28:09,064 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 15:28:09,092 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54f78fa4/8b2c573e623e4a32bc12ae86885f3c13/FLAG121056bda [2023-08-03 15:28:09,109 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e54f78fa4/8b2c573e623e4a32bc12ae86885f3c13 [2023-08-03 15:28:09,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:28:09,115 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:28:09,119 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:28:09,119 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:28:09,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:28:09,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@689df0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09, skipping insertion in model container [2023-08-03 15:28:09,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,177 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:28:09,497 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i[47038,47051] [2023-08-03 15:28:09,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:28:09,531 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:28:09,559 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 15:28:09,561 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-03 15:28:09,579 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_81-list_racing_bound2.i[47038,47051] [2023-08-03 15:28:09,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:28:09,677 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:28:09,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09 WrapperNode [2023-08-03 15:28:09,678 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:28:09,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:28:09,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:28:09,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:28:09,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,739 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-08-03 15:28:09,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:28:09,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:28:09,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:28:09,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:28:09,753 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,783 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:28:09,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:28:09,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:28:09,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:28:09,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (1/1) ... [2023-08-03 15:28:09,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:28:09,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:28:09,834 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) [2023-08-03 15:28:09,855 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 [2023-08-03 15:28:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:28:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-03 15:28:09,874 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-08-03 15:28:09,875 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-08-03 15:28:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:28:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 15:28:09,875 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 15:28:09,876 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 15:28:09,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:28:09,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:28:09,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:28:09,879 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 15:28:10,055 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:28:10,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:28:10,352 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:28:10,359 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:28:10,360 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-03 15:28:10,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:28:10 BoogieIcfgContainer [2023-08-03 15:28:10,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:28:10,364 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:28:10,364 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:28:10,366 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:28:10,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:28:09" (1/3) ... [2023-08-03 15:28:10,367 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:28:10, skipping insertion in model container [2023-08-03 15:28:10,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:28:09" (2/3) ... [2023-08-03 15:28:10,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b4c2e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:28:10, skipping insertion in model container [2023-08-03 15:28:10,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:28:10" (3/3) ... [2023-08-03 15:28:10,369 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_81-list_racing_bound2.i [2023-08-03 15:28:10,375 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:28:10,383 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:28:10,384 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:28:10,384 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:28:10,464 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 15:28:10,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 209 transitions, 440 flow [2023-08-03 15:28:10,630 INFO L124 PetriNetUnfolderBase]: 52/398 cut-off events. [2023-08-03 15:28:10,630 INFO L125 PetriNetUnfolderBase]: For 8/15 co-relation queries the response was YES. [2023-08-03 15:28:10,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 398 events. 52/398 cut-off events. For 8/15 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1606 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 205. Up to 8 conditions per place. [2023-08-03 15:28:10,638 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 209 transitions, 440 flow [2023-08-03 15:28:10,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 207 transitions, 430 flow [2023-08-03 15:28:10,647 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:28:10,655 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-03 15:28:10,657 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 207 transitions, 430 flow [2023-08-03 15:28:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 207 transitions, 430 flow [2023-08-03 15:28:10,718 INFO L124 PetriNetUnfolderBase]: 48/386 cut-off events. [2023-08-03 15:28:10,718 INFO L125 PetriNetUnfolderBase]: For 4/7 co-relation queries the response was YES. [2023-08-03 15:28:10,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402 conditions, 386 events. 48/386 cut-off events. For 4/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1533 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 193. Up to 8 conditions per place. [2023-08-03 15:28:10,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 12564 [2023-08-03 15:28:16,671 INFO L134 LiptonReduction]: Checked pairs total: 21299 [2023-08-03 15:28:16,671 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-03 15:28:16,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:28:16,688 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;@102b47bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:28:16,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 15:28:16,693 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:28:16,693 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 15:28:16,693 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:28:16,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:28:16,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:28:16,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 15:28:16,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:28:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1532212723, now seen corresponding path program 1 times [2023-08-03 15:28:16,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:28:16,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702021162] [2023-08-03 15:28:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:28:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:28:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:28:16,850 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:28:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:28:16,914 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:28:16,915 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:28:16,916 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-03 15:28:16,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 15:28:16,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 15:28:16,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 15:28:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:28:16,919 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 15:28:16,924 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:28:16,924 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:28:16,993 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 15:28:17,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,211 INFO L124 PetriNetUnfolderBase]: 191/1179 cut-off events. [2023-08-03 15:28:17,211 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2023-08-03 15:28:17,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 15:28:17,230 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,242 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,243 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:28:17,243 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,244 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 323 transitions, 694 flow [2023-08-03 15:28:17,450 INFO L124 PetriNetUnfolderBase]: 191/1179 cut-off events. [2023-08-03 15:28:17,450 INFO L125 PetriNetUnfolderBase]: For 72/95 co-relation queries the response was YES. [2023-08-03 15:28:17,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 1179 events. 191/1179 cut-off events. For 72/95 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 7271 event pairs, 2 based on Foata normal form. 0/992 useless extension candidates. Maximal degree in co-relation 745. Up to 32 conditions per place. [2023-08-03 15:28:17,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 51412 [2023-08-03 15:28:24,547 INFO L134 LiptonReduction]: Checked pairs total: 101735 [2023-08-03 15:28:24,548 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-03 15:28:24,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:28:24,551 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;@102b47bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:28:24,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-03 15:28:24,557 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:28:24,557 INFO L124 PetriNetUnfolderBase]: 5/63 cut-off events. [2023-08-03 15:28:24,557 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 15:28:24,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:28:24,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:28:24,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:28:24,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:28:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1874496575, now seen corresponding path program 1 times [2023-08-03 15:28:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:28:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851859266] [2023-08-03 15:28:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:28:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:28:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:28:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:28:24,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:28:24,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851859266] [2023-08-03 15:28:24,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851859266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:28:24,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:28:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:28:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063430637] [2023-08-03 15:28:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:28:24,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:28:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:28:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:28:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:28:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 572 [2023-08-03 15:28:24,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 112 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:28:24,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:28:24,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 572 [2023-08-03 15:28:24,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:29:38,538 INFO L124 PetriNetUnfolderBase]: 783305/1048357 cut-off events. [2023-08-03 15:29:38,539 INFO L125 PetriNetUnfolderBase]: For 44920/44920 co-relation queries the response was YES. [2023-08-03 15:29:40,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2056556 conditions, 1048357 events. 783305/1048357 cut-off events. For 44920/44920 co-relation queries the response was YES. Maximal size of possible extension queue 21058. Compared 8018875 event pairs, 546616 based on Foata normal form. 84048/984751 useless extension candidates. Maximal degree in co-relation 324969. Up to 987090 conditions per place. [2023-08-03 15:29:43,020 INFO L140 encePairwiseOnDemand]: 547/572 looper letters, 81 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2023-08-03 15:29:43,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 99 transitions, 412 flow [2023-08-03 15:29:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:29:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:29:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 937 transitions. [2023-08-03 15:29:43,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546037296037296 [2023-08-03 15:29:43,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 937 transitions. [2023-08-03 15:29:43,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 937 transitions. [2023-08-03 15:29:43,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:29:43,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 937 transitions. [2023-08-03 15:29:43,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:43,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:43,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 572.0) internal successors, (2288), 4 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:43,055 INFO L175 Difference]: Start difference. First operand has 87 places, 112 transitions, 272 flow. Second operand 3 states and 937 transitions. [2023-08-03 15:29:43,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 99 transitions, 412 flow [2023-08-03 15:29:43,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 99 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:29:43,076 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 240 flow [2023-08-03 15:29:43,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-08-03 15:29:43,080 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2023-08-03 15:29:43,080 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 240 flow [2023-08-03 15:29:43,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:43,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:29:43,081 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:29:43,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 15:29:43,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:29:43,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:29:43,082 INFO L85 PathProgramCache]: Analyzing trace with hash -792283344, now seen corresponding path program 1 times [2023-08-03 15:29:43,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:29:43,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76143251] [2023-08-03 15:29:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:29:43,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:29:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:29:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:29:43,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:29:43,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76143251] [2023-08-03 15:29:43,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76143251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:29:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447907759] [2023-08-03 15:29:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:29:43,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:29:43,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:29:43,233 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) [2023-08-03 15:29:43,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 15:29:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:29:43,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:29:43,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:29:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:29:43,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:29:43,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447907759] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:29:43,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:29:43,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:29:43,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142175741] [2023-08-03 15:29:43,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:29:43,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:29:43,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:29:43,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:29:43,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:29:43,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 15:29:43,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:29:43,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:29:43,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 15:29:43,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:30:55,501 INFO L124 PetriNetUnfolderBase]: 783208/1047500 cut-off events. [2023-08-03 15:30:55,502 INFO L125 PetriNetUnfolderBase]: For 44892/44892 co-relation queries the response was YES. [2023-08-03 15:30:57,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055669 conditions, 1047500 events. 783208/1047500 cut-off events. For 44892/44892 co-relation queries the response was YES. Maximal size of possible extension queue 21044. Compared 8008324 event pairs, 408920 based on Foata normal form. 56/900244 useless extension candidates. Maximal degree in co-relation 369542. Up to 986801 conditions per place. [2023-08-03 15:31:00,188 INFO L140 encePairwiseOnDemand]: 568/572 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2023-08-03 15:31:00,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 474 flow [2023-08-03 15:31:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:31:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:31:00,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1478 transitions. [2023-08-03 15:31:00,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167832167832168 [2023-08-03 15:31:00,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1478 transitions. [2023-08-03 15:31:00,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1478 transitions. [2023-08-03 15:31:00,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:31:00,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1478 transitions. [2023-08-03 15:31:00,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 295.6) internal successors, (1478), 5 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:00,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:00,204 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 572.0) internal successors, (3432), 6 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:00,204 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 240 flow. Second operand 5 states and 1478 transitions. [2023-08-03 15:31:00,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 474 flow [2023-08-03 15:31:00,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 466 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 15:31:00,251 INFO L231 Difference]: Finished difference. Result has 92 places, 91 transitions, 247 flow [2023-08-03 15:31:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=92, PETRI_TRANSITIONS=91} [2023-08-03 15:31:00,252 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 5 predicate places. [2023-08-03 15:31:00,252 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 91 transitions, 247 flow [2023-08-03 15:31:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.6) internal successors, (1388), 5 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:00,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:31:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:31:00,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 15:31:00,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:31:00,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:31:00,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:31:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1059695554, now seen corresponding path program 1 times [2023-08-03 15:31:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:31:00,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131288833] [2023-08-03 15:31:00,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:31:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:31:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:31:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:00,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:31:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131288833] [2023-08-03 15:31:00,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131288833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:31:00,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295266487] [2023-08-03 15:31:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:31:00,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:31:00,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:31:00,552 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) [2023-08-03 15:31:00,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 15:31:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:31:00,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 15:31:00,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:31:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:00,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:31:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:31:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295266487] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:31:00,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:31:00,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 15:31:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907554103] [2023-08-03 15:31:00,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:31:00,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:31:00,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:31:00,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:31:00,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:31:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 572 [2023-08-03 15:31:00,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 91 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:31:00,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:31:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 572 [2023-08-03 15:31:00,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:32:09,919 INFO L124 PetriNetUnfolderBase]: 760454/1012602 cut-off events. [2023-08-03 15:32:09,919 INFO L125 PetriNetUnfolderBase]: For 32542/32542 co-relation queries the response was YES. [2023-08-03 15:32:11,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984376 conditions, 1012602 events. 760454/1012602 cut-off events. For 32542/32542 co-relation queries the response was YES. Maximal size of possible extension queue 20214. Compared 7620355 event pairs, 397582 based on Foata normal form. 8/870730 useless extension candidates. Maximal degree in co-relation 231786. Up to 956912 conditions per place. [2023-08-03 15:32:14,417 INFO L140 encePairwiseOnDemand]: 569/572 looper letters, 93 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-03 15:32:14,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 111 transitions, 475 flow [2023-08-03 15:32:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:32:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:32:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1201 transitions. [2023-08-03 15:32:14,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5249125874125874 [2023-08-03 15:32:14,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1201 transitions. [2023-08-03 15:32:14,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1201 transitions. [2023-08-03 15:32:14,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:32:14,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1201 transitions. [2023-08-03 15:32:14,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 300.25) internal successors, (1201), 4 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:14,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:14,429 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 572.0) internal successors, (2860), 5 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:14,429 INFO L175 Difference]: Start difference. First operand has 92 places, 91 transitions, 247 flow. Second operand 4 states and 1201 transitions. [2023-08-03 15:32:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 111 transitions, 475 flow [2023-08-03 15:32:14,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 470 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 15:32:14,437 INFO L231 Difference]: Finished difference. Result has 93 places, 90 transitions, 240 flow [2023-08-03 15:32:14,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=572, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=93, PETRI_TRANSITIONS=90} [2023-08-03 15:32:14,439 INFO L281 CegarLoopForPetriNet]: 87 programPoint places, 6 predicate places. [2023-08-03 15:32:14,441 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 90 transitions, 240 flow [2023-08-03 15:32:14,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 279.4) internal successors, (1397), 5 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:14,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:32:14,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:32:14,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 15:32:14,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 15:32:14,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-03 15:32:14,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:32:14,653 INFO L85 PathProgramCache]: Analyzing trace with hash 822587350, now seen corresponding path program 1 times [2023-08-03 15:32:14,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:32:14,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564455060] [2023-08-03 15:32:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:32:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:32:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:32:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:15,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:32:15,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564455060] [2023-08-03 15:32:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564455060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:32:15,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548506335] [2023-08-03 15:32:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:32:15,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:32:15,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:32:15,349 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) [2023-08-03 15:32:15,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 15:32:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:32:15,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-03 15:32:15,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:32:15,542 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-03 15:32:15,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-03 15:32:15,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-08-03 15:32:15,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:15,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:15,700 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-03 15:32:15,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-03 15:32:15,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 15:32:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:15,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:32:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 15:32:15,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548506335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:32:15,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:32:15,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-08-03 15:32:15,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639975136] [2023-08-03 15:32:15,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:32:15,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 15:32:15,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:32:15,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 15:32:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=214, Unknown=5, NotChecked=0, Total=272 [2023-08-03 15:32:16,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 572 [2023-08-03 15:32:16,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 90 transitions, 240 flow. Second operand has 17 states, 17 states have (on average 217.41176470588235) internal successors, (3696), 17 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 15:32:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:32:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 572 [2023-08-03 15:32:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand