/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_lamport_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:41:19,769 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:41:19,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:41:19,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:41:19,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:41:19,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:41:19,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:41:19,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:41:19,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:41:19,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:41:19,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:41:19,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:41:19,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:41:19,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:41:19,894 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:41:19,894 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:41:19,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:41:19,895 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:41:19,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:41:19,895 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:41:19,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:41:19,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:41:19,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:41:19,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:41:19,897 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:41:19,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:41:19,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:41:19,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:41:19,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:41:19,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:41:19,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:41:19,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:41:19,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:41:19,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:41:19,901 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:41:19,901 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:41:20,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:41:20,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:41:20,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:41:20,112 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:41:20,112 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:41:20,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_lamport_bound2.i [2023-08-04 04:41:21,224 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:41:21,469 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:41:21,470 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-atomic_lamport_bound2.i [2023-08-04 04:41:21,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973291775/985b9e0a96e94d078cea0bc041d5e818/FLAGf852ccfe7 [2023-08-04 04:41:21,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/973291775/985b9e0a96e94d078cea0bc041d5e818 [2023-08-04 04:41:21,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:41:21,517 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:41:21,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:41:21,521 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:41:21,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:41:21,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:41:21" (1/1) ... [2023-08-04 04:41:21,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40f73822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:21, skipping insertion in model container [2023-08-04 04:41:21,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:41:21" (1/1) ... [2023-08-04 04:41:21,569 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:41:21,752 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:41:21,903 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-atomic_lamport_bound2.i[32156,32169] [2023-08-04 04:41:21,909 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-atomic_lamport_bound2.i[34083,34096] [2023-08-04 04:41:21,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:41:21,937 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:41:21,958 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-04 04:41:21,964 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-04 04:41:21,965 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [265] [2023-08-04 04:41:21,990 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-atomic_lamport_bound2.i[32156,32169] [2023-08-04 04:41:21,994 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-atomic_lamport_bound2.i[34083,34096] [2023-08-04 04:41:22,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:41:22,031 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:41:22,031 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:41:22,031 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 04:41:22,038 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:41:22,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22 WrapperNode [2023-08-04 04:41:22,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:41:22,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:41:22,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:41:22,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:41:22,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,077 INFO L138 Inliner]: procedures = 171, calls = 83, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 76 [2023-08-04 04:41:22,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:41:22,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:41:22,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:41:22,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:41:22,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,090 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,101 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,103 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:41:22,110 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:41:22,110 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:41:22,110 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:41:22,111 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (1/1) ... [2023-08-04 04:41:22,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:41:22,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:41:22,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 04:41:22,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 04:41:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:41:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-04 04:41:22,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-04 04:41:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 04:41:22,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 04:41:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:41:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 04:41:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:41:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:41:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:41:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:41:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 04:41:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:41:22,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:41:22,191 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:41:22,298 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:41:22,300 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:41:22,614 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:41:22,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:41:22,623 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 04:41:22,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:41:22 BoogieIcfgContainer [2023-08-04 04:41:22,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:41:22,631 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:41:22,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:41:22,636 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:41:22,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:41:21" (1/3) ... [2023-08-04 04:41:22,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee2ab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:41:22, skipping insertion in model container [2023-08-04 04:41:22,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:41:22" (2/3) ... [2023-08-04 04:41:22,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee2ab1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:41:22, skipping insertion in model container [2023-08-04 04:41:22,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:41:22" (3/3) ... [2023-08-04 04:41:22,639 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-atomic_lamport_bound2.i [2023-08-04 04:41:22,647 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:41:22,656 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:41:22,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 04:41:22,657 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:41:22,754 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 04:41:22,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:22,923 INFO L124 PetriNetUnfolderBase]: 58/305 cut-off events. [2023-08-04 04:41:22,924 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:41:22,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 305 events. 58/305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1229 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 166. Up to 10 conditions per place. [2023-08-04 04:41:22,936 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:22,946 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:22,950 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:41:22,961 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:22,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:22,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:23,013 INFO L124 PetriNetUnfolderBase]: 58/305 cut-off events. [2023-08-04 04:41:23,013 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:41:23,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 305 events. 58/305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1229 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 166. Up to 10 conditions per place. [2023-08-04 04:41:23,024 INFO L119 LiptonReduction]: Number of co-enabled transitions 11610 [2023-08-04 04:41:24,953 INFO L134 LiptonReduction]: Checked pairs total: 26571 [2023-08-04 04:41:24,953 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-04 04:41:24,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:41:24,972 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;@4d133ae9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:41:24,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 04:41:24,976 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:41:24,976 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-04 04:41:24,976 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:41:24,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:24,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:41:24,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:41:24,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash 639878799, now seen corresponding path program 1 times [2023-08-04 04:41:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3301546] [2023-08-04 04:41:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:25,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:25,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3301546] [2023-08-04 04:41:25,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3301546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:41:25,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:41:25,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:41:25,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755513070] [2023-08-04 04:41:25,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:41:25,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 04:41:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:25,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 04:41:25,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 04:41:25,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 259 [2023-08-04 04:41:25,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 79 transitions, 180 flow. Second operand has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:25,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:25,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 259 [2023-08-04 04:41:25,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:41:25,755 INFO L124 PetriNetUnfolderBase]: 4077/6596 cut-off events. [2023-08-04 04:41:25,756 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 04:41:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 6596 events. 4077/6596 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 40734 event pairs, 2354 based on Foata normal form. 90/4385 useless extension candidates. Maximal degree in co-relation 11548. Up to 5638 conditions per place. [2023-08-04 04:41:25,870 INFO L140 encePairwiseOnDemand]: 254/259 looper letters, 52 selfloop transitions, 0 changer transitions 0/74 dead transitions. [2023-08-04 04:41:25,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 274 flow [2023-08-04 04:41:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-04 04:41:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-04 04:41:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 331 transitions. [2023-08-04 04:41:25,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638996138996139 [2023-08-04 04:41:25,884 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 331 transitions. [2023-08-04 04:41:25,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 331 transitions. [2023-08-04 04:41:25,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:41:25,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 331 transitions. [2023-08-04 04:41:25,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 165.5) internal successors, (331), 2 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:25,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:25,894 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:25,896 INFO L175 Difference]: Start difference. First operand has 63 places, 79 transitions, 180 flow. Second operand 2 states and 331 transitions. [2023-08-04 04:41:25,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 274 flow [2023-08-04 04:41:25,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 274 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:41:25,904 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 170 flow [2023-08-04 04:41:25,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2023-08-04 04:41:25,908 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-08-04 04:41:25,909 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 170 flow [2023-08-04 04:41:25,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:25,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:25,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:41:25,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:41:25,910 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:41:25,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1343377875, now seen corresponding path program 1 times [2023-08-04 04:41:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:25,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280717829] [2023-08-04 04:41:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:25,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:25,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280717829] [2023-08-04 04:41:25,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280717829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:41:25,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:41:25,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:41:25,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432091812] [2023-08-04 04:41:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:41:25,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:41:25,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:25,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:41:25,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:41:26,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 259 [2023-08-04 04:41:26,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:26,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 259 [2023-08-04 04:41:26,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:41:26,479 INFO L124 PetriNetUnfolderBase]: 4420/7286 cut-off events. [2023-08-04 04:41:26,479 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-04 04:41:26,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13647 conditions, 7286 events. 4420/7286 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 46196 event pairs, 1745 based on Foata normal form. 0/4912 useless extension candidates. Maximal degree in co-relation 13642. Up to 4360 conditions per place. [2023-08-04 04:41:26,522 INFO L140 encePairwiseOnDemand]: 252/259 looper letters, 76 selfloop transitions, 5 changer transitions 4/105 dead transitions. [2023-08-04 04:41:26,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 412 flow [2023-08-04 04:41:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:41:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:41:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-08-04 04:41:26,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6203346203346203 [2023-08-04 04:41:26,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-08-04 04:41:26,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-08-04 04:41:26,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:41:26,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-08-04 04:41:26,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,530 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 170 flow. Second operand 3 states and 482 transitions. [2023-08-04 04:41:26,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 412 flow [2023-08-04 04:41:26,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:41:26,534 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 198 flow [2023-08-04 04:41:26,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2023-08-04 04:41:26,535 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 04:41:26,535 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 198 flow [2023-08-04 04:41:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:26,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:41:26,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:41:26,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:41:26,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash -748411588, now seen corresponding path program 1 times [2023-08-04 04:41:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:26,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252990382] [2023-08-04 04:41:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:26,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:26,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252990382] [2023-08-04 04:41:26,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252990382] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:41:26,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:41:26,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:41:26,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593979709] [2023-08-04 04:41:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:41:26,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:41:26,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:26,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:41:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:41:26,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 259 [2023-08-04 04:41:26,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:26,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:26,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 259 [2023-08-04 04:41:26,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:41:27,069 INFO L124 PetriNetUnfolderBase]: 4052/6886 cut-off events. [2023-08-04 04:41:27,070 INFO L125 PetriNetUnfolderBase]: For 1016/1017 co-relation queries the response was YES. [2023-08-04 04:41:27,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 6886 events. 4052/6886 cut-off events. For 1016/1017 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 46723 event pairs, 1422 based on Foata normal form. 0/5123 useless extension candidates. Maximal degree in co-relation 13602. Up to 5681 conditions per place. [2023-08-04 04:41:27,115 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 68 selfloop transitions, 2 changer transitions 1/92 dead transitions. [2023-08-04 04:41:27,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 378 flow [2023-08-04 04:41:27,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:41:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:41:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-04 04:41:27,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2023-08-04 04:41:27,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-04 04:41:27,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-04 04:41:27,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:41:27,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-04 04:41:27,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:27,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:27,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:27,121 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 198 flow. Second operand 3 states and 469 transitions. [2023-08-04 04:41:27,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 378 flow [2023-08-04 04:41:27,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:41:27,140 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 193 flow [2023-08-04 04:41:27,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=193, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-04 04:41:27,141 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2023-08-04 04:41:27,141 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 193 flow [2023-08-04 04:41:27,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:27,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:27,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:41:27,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:41:27,142 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr2Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:41:27,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:27,143 INFO L85 PathProgramCache]: Analyzing trace with hash 7414883, now seen corresponding path program 1 times [2023-08-04 04:41:27,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:27,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049529444] [2023-08-04 04:41:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:27,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:27,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049529444] [2023-08-04 04:41:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049529444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:41:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555676838] [2023-08-04 04:41:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:27,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:41:27,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:41:27,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:41:27,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:41:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:27,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 04:41:27,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:41:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:41:27,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:41:27,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555676838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:41:27,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:41:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 04:41:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871103077] [2023-08-04 04:41:27,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:41:27,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:41:27,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:41:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:41:27,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 259 [2023-08-04 04:41:27,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:27,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:27,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 259 [2023-08-04 04:41:27,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:41:27,955 INFO L124 PetriNetUnfolderBase]: 4171/6780 cut-off events. [2023-08-04 04:41:27,956 INFO L125 PetriNetUnfolderBase]: For 476/476 co-relation queries the response was YES. [2023-08-04 04:41:27,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13406 conditions, 6780 events. 4171/6780 cut-off events. For 476/476 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41937 event pairs, 1793 based on Foata normal form. 150/5008 useless extension candidates. Maximal degree in co-relation 13398. Up to 4429 conditions per place. [2023-08-04 04:41:27,998 INFO L140 encePairwiseOnDemand]: 252/259 looper letters, 72 selfloop transitions, 4 changer transitions 7/102 dead transitions. [2023-08-04 04:41:27,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 102 transitions, 423 flow [2023-08-04 04:41:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:41:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:41:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 476 transitions. [2023-08-04 04:41:28,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126126126126126 [2023-08-04 04:41:28,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 476 transitions. [2023-08-04 04:41:28,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 476 transitions. [2023-08-04 04:41:28,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:41:28,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 476 transitions. [2023-08-04 04:41:28,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.66666666666666) internal successors, (476), 3 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,004 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,005 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 193 flow. Second operand 3 states and 476 transitions. [2023-08-04 04:41:28,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 102 transitions, 423 flow [2023-08-04 04:41:28,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 102 transitions, 419 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:41:28,009 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 203 flow [2023-08-04 04:41:28,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2023-08-04 04:41:28,010 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 5 predicate places. [2023-08-04 04:41:28,010 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 203 flow [2023-08-04 04:41:28,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:28,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:41:28,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 04:41:28,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:41:28,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:41:28,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1240072829, now seen corresponding path program 1 times [2023-08-04 04:41:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:28,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520979419] [2023-08-04 04:41:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:28,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520979419] [2023-08-04 04:41:28,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520979419] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:41:28,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939299775] [2023-08-04 04:41:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:28,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:41:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:41:28,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:41:28,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:41:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:28,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:41:28,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:41:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:28,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:41:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939299775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:41:28,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:41:28,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:41:28,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907372323] [2023-08-04 04:41:28,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:41:28,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:41:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:28,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:41:28,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:41:28,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 259 [2023-08-04 04:41:28,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:28,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 259 [2023-08-04 04:41:28,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:41:28,496 INFO L124 PetriNetUnfolderBase]: 39/90 cut-off events. [2023-08-04 04:41:28,496 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 04:41:28,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 90 events. 39/90 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 226 event pairs, 8 based on Foata normal form. 11/85 useless extension candidates. Maximal degree in co-relation 187. Up to 56 conditions per place. [2023-08-04 04:41:28,497 INFO L140 encePairwiseOnDemand]: 256/259 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2023-08-04 04:41:28,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 44 transitions, 180 flow [2023-08-04 04:41:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:41:28,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:41:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2023-08-04 04:41:28,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463320463320464 [2023-08-04 04:41:28,500 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2023-08-04 04:41:28,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2023-08-04 04:41:28,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:41:28,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2023-08-04 04:41:28,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,504 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 259.0) internal successors, (1295), 5 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,505 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 203 flow. Second operand 4 states and 566 transitions. [2023-08-04 04:41:28,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 44 transitions, 180 flow [2023-08-04 04:41:28,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 44 transitions, 164 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-04 04:41:28,506 INFO L231 Difference]: Finished difference. Result has 29 places, 0 transitions, 0 flow [2023-08-04 04:41:28,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=29, PETRI_TRANSITIONS=0} [2023-08-04 04:41:28,507 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -34 predicate places. [2023-08-04 04:41:28,507 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 0 transitions, 0 flow [2023-08-04 04:41:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:28,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 04:41:28,510 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 04:41:28,511 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 04:41:28,511 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 04:41:28,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:41:28,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:41:28,717 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 04:41:28,719 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 04:41:28,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,748 INFO L124 PetriNetUnfolderBase]: 58/305 cut-off events. [2023-08-04 04:41:28,748 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:41:28,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 305 events. 58/305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1229 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 166. Up to 10 conditions per place. [2023-08-04 04:41:28,750 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,752 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:41:28,752 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,752 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 159 transitions, 340 flow [2023-08-04 04:41:28,775 INFO L124 PetriNetUnfolderBase]: 58/305 cut-off events. [2023-08-04 04:41:28,775 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:41:28,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 305 events. 58/305 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1229 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 166. Up to 10 conditions per place. [2023-08-04 04:41:28,785 INFO L119 LiptonReduction]: Number of co-enabled transitions 11610 [2023-08-04 04:41:30,454 INFO L134 LiptonReduction]: Checked pairs total: 26627 [2023-08-04 04:41:30,454 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-04 04:41:30,456 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:41:30,457 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;@4d133ae9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:41:30,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:41:30,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:41:30,460 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2023-08-04 04:41:30,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:41:30,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:30,461 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:41:30,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:41:30,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1317704184, now seen corresponding path program 1 times [2023-08-04 04:41:30,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:30,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252234421] [2023-08-04 04:41:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:30,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:41:30,490 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:41:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:41:30,525 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:41:30,527 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:41:30,527 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 04:41:30,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 04:41:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:41:30,527 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:41:30,531 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 04:41:30,531 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:41:30,531 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:41:30,578 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 04:41:30,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,683 INFO L124 PetriNetUnfolderBase]: 197/937 cut-off events. [2023-08-04 04:41:30,684 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:41:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 937 events. 197/937 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5124 event pairs, 1 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 571. Up to 32 conditions per place. [2023-08-04 04:41:30,699 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,707 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,707 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:41:30,708 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,708 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 251 transitions, 550 flow [2023-08-04 04:41:30,821 INFO L124 PetriNetUnfolderBase]: 197/937 cut-off events. [2023-08-04 04:41:30,822 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-04 04:41:30,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 937 events. 197/937 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5124 event pairs, 1 based on Foata normal form. 0/745 useless extension candidates. Maximal degree in co-relation 571. Up to 32 conditions per place. [2023-08-04 04:41:30,880 INFO L119 LiptonReduction]: Number of co-enabled transitions 39732 [2023-08-04 04:41:32,801 INFO L134 LiptonReduction]: Checked pairs total: 104445 [2023-08-04 04:41:32,801 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-04 04:41:32,803 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:41:32,804 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;@4d133ae9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:41:32,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-04 04:41:32,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:41:32,806 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-08-04 04:41:32,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:41:32,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:41:32,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 04:41:32,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr2Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-04 04:41:32,806 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:41:32,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1201823205, now seen corresponding path program 1 times [2023-08-04 04:41:32,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:41:32,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130218357] [2023-08-04 04:41:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:41:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:41:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:41:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:41:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:41:32,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130218357] [2023-08-04 04:41:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130218357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:41:32,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:41:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:41:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517116715] [2023-08-04 04:41:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:41:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-04 04:41:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:41:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-04 04:41:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-04 04:41:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 399 [2023-08-04 04:41:32,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 134 transitions, 316 flow. Second operand has 2 states, 2 states have (on average 213.5) internal successors, (427), 2 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:41:32,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:41:32,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 399 [2023-08-04 04:41:32,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand