/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/increased_bounds/pthread-wmm_mix017_power.opt_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:10:31,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:10:31,183 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:10:31,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:10:31,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:10:31,186 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:10:31,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:10:31,199 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:10:31,200 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:10:31,200 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:10:31,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:10:31,201 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:10:31,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:10:31,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:10:31,202 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:10:31,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:10:31,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:10:31,202 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:10:31,203 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:10:31,203 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:10:31,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:10:31,204 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:10:31,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:10:31,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:10:31,204 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:10:31,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:10:31,205 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:10:31,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:10:31,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:10:31,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:10:31,206 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:10:31,206 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:10:31,206 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:10:31,207 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:10:31,207 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:10:31,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:10:31,207 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:10:31,208 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:10:31,208 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:10:31,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:10:31,208 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:10:31,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:10:31,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:10:31,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:10:31,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:10:31,422 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:10:31,425 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:10:31,426 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix017_power.opt_rmo.opt_bound2.i [2023-08-03 17:10:32,367 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:10:32,553 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:10:32,554 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix017_power.opt_rmo.opt_bound2.i [2023-08-03 17:10:32,562 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef401d414/f92cc32945574b0091a259f18718740d/FLAG343ecf72e [2023-08-03 17:10:32,574 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef401d414/f92cc32945574b0091a259f18718740d [2023-08-03 17:10:32,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:10:32,576 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:10:32,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:10:32,577 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:10:32,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:10:32,580 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:10:32" (1/1) ... [2023-08-03 17:10:32,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e4737c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:32, skipping insertion in model container [2023-08-03 17:10:32,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:10:32" (1/1) ... [2023-08-03 17:10:32,622 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:10:32,744 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix017_power.opt_rmo.opt_bound2.i[958,971] [2023-08-03 17:10:32,927 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:10:32,936 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:10:32,945 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix017_power.opt_rmo.opt_bound2.i[958,971] [2023-08-03 17:10:32,963 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:10:32,964 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:10:32,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:10:33,014 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:10:33,015 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:10:33,019 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:10:33,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33 WrapperNode [2023-08-03 17:10:33,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:10:33,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:10:33,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:10:33,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:10:33,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,090 INFO L138 Inliner]: procedures = 177, calls = 69, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 178 [2023-08-03 17:10:33,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:10:33,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:10:33,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:10:33,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:10:33,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,114 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,129 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,131 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,134 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:10:33,134 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:10:33,134 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:10:33,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:10:33,135 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (1/1) ... [2023-08-03 17:10:33,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:10:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:10:33,156 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 17:10:33,180 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 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:10:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:10:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:10:33,202 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 17:10:33,202 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 17:10:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-03 17:10:33,203 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-03 17:10:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:10:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:10:33,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:10:33,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:10:33,204 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 17:10:33,298 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:10:33,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:10:33,498 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:10:33,588 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:10:33,588 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 17:10:33,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:10:33 BoogieIcfgContainer [2023-08-03 17:10:33,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:10:33,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:10:33,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:10:33,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:10:33,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:10:32" (1/3) ... [2023-08-03 17:10:33,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7fa721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:10:33, skipping insertion in model container [2023-08-03 17:10:33,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:10:33" (2/3) ... [2023-08-03 17:10:33,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7fa721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:10:33, skipping insertion in model container [2023-08-03 17:10:33,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:10:33" (3/3) ... [2023-08-03 17:10:33,594 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix017_power.opt_rmo.opt_bound2.i [2023-08-03 17:10:33,599 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:10:33,604 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:10:33,604 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 17:10:33,604 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:10:33,658 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:10:33,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,842 INFO L124 PetriNetUnfolderBase]: 62/934 cut-off events. [2023-08-03 17:10:33,843 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:10:33,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 934 events. 62/934 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5785 event pairs, 0 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 555. Up to 32 conditions per place. [2023-08-03 17:10:33,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,858 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:10:33,867 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 158 transitions, 336 flow [2023-08-03 17:10:33,933 INFO L124 PetriNetUnfolderBase]: 62/934 cut-off events. [2023-08-03 17:10:33,934 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:10:33,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 934 events. 62/934 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5785 event pairs, 0 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 555. Up to 32 conditions per place. [2023-08-03 17:10:33,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 4020 [2023-08-03 17:10:36,938 INFO L134 LiptonReduction]: Checked pairs total: 9611 [2023-08-03 17:10:36,939 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-08-03 17:10:36,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:10:36,957 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;@1cf5c587, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:10:36,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 17:10:36,960 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:10:36,960 INFO L124 PetriNetUnfolderBase]: 1/24 cut-off events. [2023-08-03 17:10:36,960 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:10:36,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:10:36,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 17:10:36,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:10:36,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:10:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1993979884, now seen corresponding path program 1 times [2023-08-03 17:10:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:10:36,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084678699] [2023-08-03 17:10:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:10:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:10:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:10:37,158 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 17:10:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:10:37,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084678699] [2023-08-03 17:10:37,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084678699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:10:37,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:10:37,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:10:37,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898680945] [2023-08-03 17:10:37,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:10:37,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:10:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:10:37,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:10:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:10:37,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 288 [2023-08-03 17:10:37,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:10:37,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:10:37,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 288 [2023-08-03 17:10:37,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:10:38,339 INFO L124 PetriNetUnfolderBase]: 10309/15057 cut-off events. [2023-08-03 17:10:38,339 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-03 17:10:38,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30103 conditions, 15057 events. 10309/15057 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 94269 event pairs, 8887 based on Foata normal form. 450/12969 useless extension candidates. Maximal degree in co-relation 30085. Up to 14573 conditions per place. [2023-08-03 17:10:38,403 INFO L140 encePairwiseOnDemand]: 284/288 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 17:10:38,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 184 flow [2023-08-03 17:10:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:10:38,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:10:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-03 17:10:38,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-03 17:10:38,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-03 17:10:38,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-03 17:10:38,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:10:38,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-03 17:10:38,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 17:10:38,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 17:10:38,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states 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 17:10:38,432 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 106 flow. Second operand 3 states and 450 transitions. [2023-08-03 17:10:38,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 184 flow [2023-08-03 17:10:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 17:10:38,436 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 112 flow [2023-08-03 17:10:38,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-03 17:10:38,439 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-03 17:10:38,439 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 112 flow [2023-08-03 17:10:38,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:10:38,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:10:38,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:10:38,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:10:38,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:10:38,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:10:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1982542228, now seen corresponding path program 1 times [2023-08-03 17:10:38,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:10:38,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725153930] [2023-08-03 17:10:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:10:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:10:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:10:38,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:10:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:10:38,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:10:38,511 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:10:38,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-03 17:10:38,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-03 17:10:38,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-08-03 17:10:38,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-03 17:10:38,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-03 17:10:38,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-03 17:10:38,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-03 17:10:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:10:38,518 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 17:10:38,520 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:10:38,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:10:38,552 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:10:38,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:38,924 INFO L124 PetriNetUnfolderBase]: 282/4334 cut-off events. [2023-08-03 17:10:38,924 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 17:10:38,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 4334 events. 282/4334 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 42199 event pairs, 0 based on Foata normal form. 0/3833 useless extension candidates. Maximal degree in co-relation 3129. Up to 162 conditions per place. [2023-08-03 17:10:38,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:38,947 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:38,947 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:10:38,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:38,947 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:38,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 190 transitions, 428 flow [2023-08-03 17:10:39,232 INFO L124 PetriNetUnfolderBase]: 282/4334 cut-off events. [2023-08-03 17:10:39,233 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-03 17:10:39,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4623 conditions, 4334 events. 282/4334 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 42199 event pairs, 0 based on Foata normal form. 0/3833 useless extension candidates. Maximal degree in co-relation 3129. Up to 162 conditions per place. [2023-08-03 17:10:39,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 9816 [2023-08-03 17:10:42,393 INFO L134 LiptonReduction]: Checked pairs total: 29353 [2023-08-03 17:10:42,393 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-03 17:10:42,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:10:42,396 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;@1cf5c587, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:10:42,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-03 17:10:42,398 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:10:42,398 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 17:10:42,398 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:10:42,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:10:42,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 17:10:42,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2023-08-03 17:10:42,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:10:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash -153015935, now seen corresponding path program 1 times [2023-08-03 17:10:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:10:42,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449757107] [2023-08-03 17:10:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:10:42,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:10:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:10:42,429 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 17:10:42,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:10:42,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449757107] [2023-08-03 17:10:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449757107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:10:42,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:10:42,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:10:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454463978] [2023-08-03 17:10:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:10:42,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:10:42,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:10:42,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:10:42,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:10:42,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 331 [2023-08-03 17:10:42,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 67 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 17:10:42,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:10:42,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 331 [2023-08-03 17:10:42,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand