/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_safe036_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:55:40,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:55:41,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:55:41,015 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:55:41,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:55:41,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:55:41,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:55:41,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:55:41,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:55:41,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:55:41,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:55:41,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:55:41,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:55:41,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:55:41,045 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:55:41,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:55:41,045 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:55:41,045 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:55:41,045 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:55:41,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:55:41,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:55:41,046 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:55:41,046 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:55:41,046 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:55:41,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:55:41,047 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:55:41,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:55:41,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:55:41,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:55:41,048 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:55:41,049 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:55:41,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:55:41,050 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:55:41,050 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:55:41,050 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:55:41,050 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:55:41,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:55:41,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:55:41,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:55:41,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:55:41,250 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:55:41,252 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:55:41,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-03 18:55:42,329 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:55:42,518 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:55:42,518 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe036_bound2.i [2023-08-03 18:55:42,529 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0126c17c8/d98c5a7a2f534db788dc9fdab87e85a3/FLAG690071545 [2023-08-03 18:55:42,538 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0126c17c8/d98c5a7a2f534db788dc9fdab87e85a3 [2023-08-03 18:55:42,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:55:42,541 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:55:42,541 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:55:42,542 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:55:42,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:55:42,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73cfec75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42, skipping insertion in model container [2023-08-03 18:55:42,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,592 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:55:42,680 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_safe036_bound2.i[941,954] [2023-08-03 18:55:42,754 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:55:42,759 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:55:42,766 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_safe036_bound2.i[941,954] [2023-08-03 18:55:42,772 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:55:42,773 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 18:55:42,785 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:55:42,804 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:55:42,805 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:55:42,809 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:55:42,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42 WrapperNode [2023-08-03 18:55:42,809 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:55:42,810 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:55:42,810 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:55:42,810 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:55:42,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,821 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,856 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-03 18:55:42,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:55:42,860 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:55:42,860 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:55:42,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:55:42,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,872 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,873 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,875 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:55:42,876 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:55:42,876 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:55:42,876 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:55:42,876 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (1/1) ... [2023-08-03 18:55:42,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:55:42,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:42,898 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 18:55:42,900 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 18:55:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:55:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:55:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:55:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:55:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:55:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:55:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:55:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:55:42,925 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:55:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:55:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:55:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:55:42,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:55:42,926 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 18:55:43,002 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:55:43,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:55:43,099 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:55:43,103 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:55:43,104 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 18:55:43,105 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:55:43 BoogieIcfgContainer [2023-08-03 18:55:43,105 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:55:43,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:55:43,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:55:43,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:55:43,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:55:42" (1/3) ... [2023-08-03 18:55:43,109 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381ee742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:55:43, skipping insertion in model container [2023-08-03 18:55:43,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:55:42" (2/3) ... [2023-08-03 18:55:43,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381ee742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:55:43, skipping insertion in model container [2023-08-03 18:55:43,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:55:43" (3/3) ... [2023-08-03 18:55:43,111 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe036_bound2.i [2023-08-03 18:55:43,116 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:55:43,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:55:43,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 18:55:43,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:55:43,149 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:55:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 174 flow [2023-08-03 18:55:43,216 INFO L124 PetriNetUnfolderBase]: 14/193 cut-off events. [2023-08-03 18:55:43,216 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:55:43,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 193 events. 14/193 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 110. Up to 8 conditions per place. [2023-08-03 18:55:43,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 174 flow [2023-08-03 18:55:43,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 72 transitions, 154 flow [2023-08-03 18:55:43,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:55:43,230 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 72 transitions, 154 flow [2023-08-03 18:55:43,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 72 transitions, 154 flow [2023-08-03 18:55:43,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 72 transitions, 154 flow [2023-08-03 18:55:43,252 INFO L124 PetriNetUnfolderBase]: 10/153 cut-off events. [2023-08-03 18:55:43,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:55:43,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 153 events. 10/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 394 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 90. Up to 8 conditions per place. [2023-08-03 18:55:43,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 876 [2023-08-03 18:55:44,481 INFO L134 LiptonReduction]: Checked pairs total: 1562 [2023-08-03 18:55:44,482 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-03 18:55:44,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:55:44,495 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;@7094440b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:55:44,495 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 18:55:44,496 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:55:44,496 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-03 18:55:44,496 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:55:44,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:44,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 18:55:44,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:44,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 9098509, now seen corresponding path program 1 times [2023-08-03 18:55:44,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:44,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889996476] [2023-08-03 18:55:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:44,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:44,646 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 18:55:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:44,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889996476] [2023-08-03 18:55:44,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889996476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:55:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:55:44,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423618008] [2023-08-03 18:55:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:44,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:55:44,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:55:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:55:44,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 143 [2023-08-03 18:55:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 18:55:44,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:44,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 143 [2023-08-03 18:55:44,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:44,710 INFO L124 PetriNetUnfolderBase]: 66/150 cut-off events. [2023-08-03 18:55:44,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:55:44,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 150 events. 66/150 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 603 event pairs, 24 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 290. Up to 130 conditions per place. [2023-08-03 18:55:44,712 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 15 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-08-03 18:55:44,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 86 flow [2023-08-03 18:55:44,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:55:44,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:55:44,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 232 transitions. [2023-08-03 18:55:44,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407925407925408 [2023-08-03 18:55:44,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 232 transitions. [2023-08-03 18:55:44,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 232 transitions. [2023-08-03 18:55:44,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:44,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 232 transitions. [2023-08-03 18:55:44,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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 18:55:44,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 18:55:44,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 18:55:44,729 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 48 flow. Second operand 3 states and 232 transitions. [2023-08-03 18:55:44,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 86 flow [2023-08-03 18:55:44,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:55:44,732 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 54 flow [2023-08-03 18:55:44,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2023-08-03 18:55:44,735 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-08-03 18:55:44,735 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 54 flow [2023-08-03 18:55:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 18:55:44,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:44,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:55:44,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:55:44,736 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:44,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:44,738 INFO L85 PathProgramCache]: Analyzing trace with hash 158482364, now seen corresponding path program 1 times [2023-08-03 18:55:44,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:44,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844528212] [2023-08-03 18:55:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:44,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:55:44,774 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:55:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:55:44,801 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:55:44,801 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:55:44,802 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 18:55:44,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 18:55:44,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 18:55:44,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:55:44,804 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:55:44,807 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:55:44,807 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:55:44,824 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:55:44,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 96 transitions, 216 flow [2023-08-03 18:55:44,866 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-03 18:55:44,867 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 18:55:44,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 412 events. 30/412 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1732 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 296. Up to 18 conditions per place. [2023-08-03 18:55:44,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 96 transitions, 216 flow [2023-08-03 18:55:44,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 86 transitions, 196 flow [2023-08-03 18:55:44,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:55:44,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 86 transitions, 196 flow [2023-08-03 18:55:44,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 86 transitions, 196 flow [2023-08-03 18:55:44,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 86 transitions, 196 flow [2023-08-03 18:55:44,895 INFO L124 PetriNetUnfolderBase]: 21/322 cut-off events. [2023-08-03 18:55:44,895 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 18:55:44,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 322 events. 21/322 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1200 event pairs, 0 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 236. Up to 18 conditions per place. [2023-08-03 18:55:44,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 2088 [2023-08-03 18:55:46,074 INFO L134 LiptonReduction]: Checked pairs total: 4284 [2023-08-03 18:55:46,074 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-03 18:55:46,076 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:55:46,076 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;@7094440b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:55:46,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 18:55:46,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:55:46,078 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-03 18:55:46,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:55:46,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:46,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 18:55:46,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:46,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:46,079 INFO L85 PathProgramCache]: Analyzing trace with hash 14397234, now seen corresponding path program 1 times [2023-08-03 18:55:46,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:46,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125886715] [2023-08-03 18:55:46,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:46,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:46,150 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 18:55:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125886715] [2023-08-03 18:55:46,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125886715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:46,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:55:46,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:55:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123070390] [2023-08-03 18:55:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:46,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:55:46,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:55:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:55:46,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 158 [2023-08-03 18:55:46,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 18:55:46,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:46,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 158 [2023-08-03 18:55:46,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:46,315 INFO L124 PetriNetUnfolderBase]: 1674/2842 cut-off events. [2023-08-03 18:55:46,315 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-03 18:55:46,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 2842 events. 1674/2842 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17004 event pairs, 1140 based on Foata normal form. 0/2649 useless extension candidates. Maximal degree in co-relation 1582. Up to 2476 conditions per place. [2023-08-03 18:55:46,406 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 22 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 18:55:46,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 32 transitions, 136 flow [2023-08-03 18:55:46,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:55:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:55:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 274 transitions. [2023-08-03 18:55:46,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780590717299579 [2023-08-03 18:55:46,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 274 transitions. [2023-08-03 18:55:46,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 274 transitions. [2023-08-03 18:55:46,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:46,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 274 transitions. [2023-08-03 18:55:46,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 18:55:46,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:46,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:46,414 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 80 flow. Second operand 3 states and 274 transitions. [2023-08-03 18:55:46,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 32 transitions, 136 flow [2023-08-03 18:55:46,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 32 transitions, 132 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 18:55:46,416 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 88 flow [2023-08-03 18:55:46,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-03 18:55:46,416 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-08-03 18:55:46,416 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 88 flow [2023-08-03 18:55:46,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 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 18:55:46,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:46,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:46,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:55:46,433 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:46,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash -976092558, now seen corresponding path program 1 times [2023-08-03 18:55:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:46,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851478182] [2023-08-03 18:55:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:55:46,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851478182] [2023-08-03 18:55:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851478182] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873797381] [2023-08-03 18:55:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:46,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:46,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:46,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:46,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 18:55:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:46,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 18:55:46,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:55:46,614 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:55:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873797381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:46,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:55:46,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 18:55:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451330054] [2023-08-03 18:55:46,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:46,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:55:46,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:55:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:55:46,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 158 [2023-08-03 18:55:46,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 18:55:46,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:46,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 158 [2023-08-03 18:55:46,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:46,777 INFO L124 PetriNetUnfolderBase]: 1646/2732 cut-off events. [2023-08-03 18:55:46,777 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-03 18:55:46,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 2732 events. 1646/2732 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16011 event pairs, 1120 based on Foata normal form. 0/2575 useless extension candidates. Maximal degree in co-relation 5343. Up to 2299 conditions per place. [2023-08-03 18:55:46,792 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 27 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-03 18:55:46,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 162 flow [2023-08-03 18:55:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:55:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:55:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-03 18:55:46,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864978902953587 [2023-08-03 18:55:46,793 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-03 18:55:46,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-03 18:55:46,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:46,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-03 18:55:46,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 18:55:46,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:46,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:46,798 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 88 flow. Second operand 3 states and 278 transitions. [2023-08-03 18:55:46,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 162 flow [2023-08-03 18:55:46,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:55:46,801 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 98 flow [2023-08-03 18:55:46,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-03 18:55:46,803 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2023-08-03 18:55:46,803 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 98 flow [2023-08-03 18:55:46,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 18:55:46,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:46,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 18:55:46,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 18:55:47,008 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 [2023-08-03 18:55:47,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:47,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:47,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1702275143, now seen corresponding path program 1 times [2023-08-03 18:55:47,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:47,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932733133] [2023-08-03 18:55:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:47,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:55:47,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932733133] [2023-08-03 18:55:47,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932733133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:47,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102979600] [2023-08-03 18:55:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:47,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:47,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:47,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:47,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 18:55:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:47,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:55:47,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 18:55:47,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:55:47,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102979600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:47,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:55:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 18:55:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293185106] [2023-08-03 18:55:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:47,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:55:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:47,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:55:47,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:55:47,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 158 [2023-08-03 18:55:47,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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 18:55:47,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:47,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 158 [2023-08-03 18:55:47,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:47,322 INFO L124 PetriNetUnfolderBase]: 1634/2715 cut-off events. [2023-08-03 18:55:47,322 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-08-03 18:55:47,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5671 conditions, 2715 events. 1634/2715 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15856 event pairs, 744 based on Foata normal form. 9/2711 useless extension candidates. Maximal degree in co-relation 1600. Up to 2377 conditions per place. [2023-08-03 18:55:47,337 INFO L140 encePairwiseOnDemand]: 154/158 looper letters, 26 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-03 18:55:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2023-08-03 18:55:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:55:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:55:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2023-08-03 18:55:47,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5569620253164557 [2023-08-03 18:55:47,339 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2023-08-03 18:55:47,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2023-08-03 18:55:47,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:47,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2023-08-03 18:55:47,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 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 18:55:47,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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 18:55:47,341 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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 18:55:47,342 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 98 flow. Second operand 5 states and 440 transitions. [2023-08-03 18:55:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2023-08-03 18:55:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 18:55:47,345 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 114 flow [2023-08-03 18:55:47,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-03 18:55:47,347 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-08-03 18:55:47,347 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 114 flow [2023-08-03 18:55:47,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.6) internal successors, (418), 5 states have internal predecessors, (418), 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 18:55:47,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:47,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:47,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 18:55:47,552 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 [2023-08-03 18:55:47,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:47,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1886598509, now seen corresponding path program 1 times [2023-08-03 18:55:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:47,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185672206] [2023-08-03 18:55:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:47,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:55:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185672206] [2023-08-03 18:55:47,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185672206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:47,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417700757] [2023-08-03 18:55:47,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:47,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:47,624 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:47,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 18:55:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:47,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:55:47,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:55:47,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:55:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 18:55:47,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417700757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:55:47,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:55:47,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:55:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35273118] [2023-08-03 18:55:47,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:55:47,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:55:47,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:47,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:55:47,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:55:47,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 158 [2023-08-03 18:55:47,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 114 flow. Second operand has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 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 18:55:47,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:47,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 158 [2023-08-03 18:55:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:47,898 INFO L124 PetriNetUnfolderBase]: 1324/2144 cut-off events. [2023-08-03 18:55:47,898 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2023-08-03 18:55:47,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4484 conditions, 2144 events. 1324/2144 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11601 event pairs, 558 based on Foata normal form. 3/2137 useless extension candidates. Maximal degree in co-relation 1600. Up to 1882 conditions per place. [2023-08-03 18:55:47,908 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 26 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-03 18:55:47,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 178 flow [2023-08-03 18:55:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:55:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:55:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-08-03 18:55:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564873417721519 [2023-08-03 18:55:47,910 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-08-03 18:55:47,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-08-03 18:55:47,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:47,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-08-03 18:55:47,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 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 18:55:47,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 18:55:47,912 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 18:55:47,912 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 114 flow. Second operand 4 states and 357 transitions. [2023-08-03 18:55:47,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 178 flow [2023-08-03 18:55:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 36 transitions, 173 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 18:55:47,914 INFO L231 Difference]: Finished difference. Result has 46 places, 29 transitions, 105 flow [2023-08-03 18:55:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=46, PETRI_TRANSITIONS=29} [2023-08-03 18:55:47,914 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-08-03 18:55:47,914 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 29 transitions, 105 flow [2023-08-03 18:55:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.8) internal successors, (424), 5 states have internal predecessors, (424), 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 18:55:47,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:47,915 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:47,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 18:55:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:48,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:48,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 870665970, now seen corresponding path program 1 times [2023-08-03 18:55:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108565071] [2023-08-03 18:55:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:48,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:55:48,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108565071] [2023-08-03 18:55:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108565071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27715900] [2023-08-03 18:55:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:48,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:48,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:48,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:48,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 18:55:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:48,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:55:48,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:55:48,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:55:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:55:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27715900] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:55:48,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:55:48,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 18:55:48,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891938551] [2023-08-03 18:55:48,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:55:48,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:55:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:48,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:55:48,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:55:48,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 158 [2023-08-03 18:55:48,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 29 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 18:55:48,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:48,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 158 [2023-08-03 18:55:48,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:48,460 INFO L124 PetriNetUnfolderBase]: 1216/1888 cut-off events. [2023-08-03 18:55:48,461 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-03 18:55:48,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4042 conditions, 1888 events. 1216/1888 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9514 event pairs, 400 based on Foata normal form. 27/1905 useless extension candidates. Maximal degree in co-relation 1439. Up to 943 conditions per place. [2023-08-03 18:55:48,471 INFO L140 encePairwiseOnDemand]: 154/158 looper letters, 34 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-03 18:55:48,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 213 flow [2023-08-03 18:55:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 18:55:48,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 18:55:48,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-03 18:55:48,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791139240506329 [2023-08-03 18:55:48,473 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-03 18:55:48,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-03 18:55:48,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:48,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-03 18:55:48,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 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 18:55:48,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 18:55:48,476 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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 18:55:48,476 INFO L175 Difference]: Start difference. First operand has 46 places, 29 transitions, 105 flow. Second operand 4 states and 366 transitions. [2023-08-03 18:55:48,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 213 flow [2023-08-03 18:55:48,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 207 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:55:48,478 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 119 flow [2023-08-03 18:55:48,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2023-08-03 18:55:48,479 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-08-03 18:55:48,479 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 119 flow [2023-08-03 18:55:48,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 85.0) internal successors, (425), 5 states have internal predecessors, (425), 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 18:55:48,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:48,480 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:48,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 18:55:48,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:48,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:48,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:48,685 INFO L85 PathProgramCache]: Analyzing trace with hash -231478199, now seen corresponding path program 1 times [2023-08-03 18:55:48,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:48,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830366709] [2023-08-03 18:55:48,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:48,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:55:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830366709] [2023-08-03 18:55:48,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830366709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121769295] [2023-08-03 18:55:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:48,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:48,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:48,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:48,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 18:55:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:48,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 18:55:48,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 18:55:48,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 18:55:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121769295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:48,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 18:55:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 18:55:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115051280] [2023-08-03 18:55:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:55:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:55:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 18:55:48,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 158 [2023-08-03 18:55:48,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 119 flow. Second operand has 5 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 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 18:55:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 158 [2023-08-03 18:55:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:49,050 INFO L124 PetriNetUnfolderBase]: 1000/1537 cut-off events. [2023-08-03 18:55:49,051 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2023-08-03 18:55:49,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3679 conditions, 1537 events. 1000/1537 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7097 event pairs, 22 based on Foata normal form. 81/1608 useless extension candidates. Maximal degree in co-relation 1301. Up to 891 conditions per place. [2023-08-03 18:55:49,061 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 38 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-03 18:55:49,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 231 flow [2023-08-03 18:55:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 18:55:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 18:55:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 451 transitions. [2023-08-03 18:55:49,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708860759493671 [2023-08-03 18:55:49,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 451 transitions. [2023-08-03 18:55:49,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 451 transitions. [2023-08-03 18:55:49,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:49,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 451 transitions. [2023-08-03 18:55:49,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.2) internal successors, (451), 5 states have internal predecessors, (451), 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 18:55:49,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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 18:55:49,066 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 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 18:55:49,066 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 119 flow. Second operand 5 states and 451 transitions. [2023-08-03 18:55:49,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 231 flow [2023-08-03 18:55:49,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 224 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 18:55:49,068 INFO L231 Difference]: Finished difference. Result has 48 places, 28 transitions, 108 flow [2023-08-03 18:55:49,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2023-08-03 18:55:49,068 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-08-03 18:55:49,068 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 108 flow [2023-08-03 18:55:49,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.6) internal successors, (423), 5 states have internal predecessors, (423), 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 18:55:49,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:49,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:49,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 18:55:49,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:49,273 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:49,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:49,274 INFO L85 PathProgramCache]: Analyzing trace with hash -231477612, now seen corresponding path program 1 times [2023-08-03 18:55:49,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:49,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063841803] [2023-08-03 18:55:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:49,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 18:55:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063841803] [2023-08-03 18:55:49,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063841803] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:55:49,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:55:49,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:55:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517238201] [2023-08-03 18:55:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:55:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:55:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:55:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:55:49,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 158 [2023-08-03 18:55:49,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 18:55:49,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:49,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 158 [2023-08-03 18:55:49,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:49,464 INFO L124 PetriNetUnfolderBase]: 872/1342 cut-off events. [2023-08-03 18:55:49,464 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2023-08-03 18:55:49,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3237 conditions, 1342 events. 872/1342 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5607 event pairs, 213 based on Foata normal form. 16/1353 useless extension candidates. Maximal degree in co-relation 2064. Up to 1109 conditions per place. [2023-08-03 18:55:49,472 INFO L140 encePairwiseOnDemand]: 152/158 looper letters, 35 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-03 18:55:49,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 267 flow [2023-08-03 18:55:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:55:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:55:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-08-03 18:55:49,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970464135021097 [2023-08-03 18:55:49,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-08-03 18:55:49,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-08-03 18:55:49,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:49,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-08-03 18:55:49,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 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 18:55:49,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:49,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 18:55:49,475 INFO L175 Difference]: Start difference. First operand has 48 places, 28 transitions, 108 flow. Second operand 3 states and 283 transitions. [2023-08-03 18:55:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 267 flow [2023-08-03 18:55:49,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 257 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 18:55:49,477 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 136 flow [2023-08-03 18:55:49,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-03 18:55:49,479 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-08-03 18:55:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 136 flow [2023-08-03 18:55:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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 18:55:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 18:55:49,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:49,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1080261746, now seen corresponding path program 1 times [2023-08-03 18:55:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138517520] [2023-08-03 18:55:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:55:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:55:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138517520] [2023-08-03 18:55:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138517520] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:55:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587237539] [2023-08-03 18:55:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:49,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:49,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:55:49,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 18:55:49,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 18:55:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:55:49,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-03 18:55:49,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:55:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:55:49,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:55:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 18:55:49,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587237539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:55:49,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:55:49,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-08-03 18:55:49,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723674060] [2023-08-03 18:55:49,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:55:49,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-03 18:55:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:55:49,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-03 18:55:49,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-08-03 18:55:49,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 158 [2023-08-03 18:55:49,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 136 flow. Second operand has 11 states, 11 states have (on average 77.0) internal successors, (847), 11 states have internal predecessors, (847), 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 18:55:49,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:55:49,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 158 [2023-08-03 18:55:49,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:55:50,504 INFO L124 PetriNetUnfolderBase]: 3274/4796 cut-off events. [2023-08-03 18:55:50,504 INFO L125 PetriNetUnfolderBase]: For 3927/3927 co-relation queries the response was YES. [2023-08-03 18:55:50,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13210 conditions, 4796 events. 3274/4796 cut-off events. For 3927/3927 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 24529 event pairs, 179 based on Foata normal form. 258/5051 useless extension candidates. Maximal degree in co-relation 6831. Up to 1399 conditions per place. [2023-08-03 18:55:50,525 INFO L140 encePairwiseOnDemand]: 145/158 looper letters, 130 selfloop transitions, 101 changer transitions 0/233 dead transitions. [2023-08-03 18:55:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 233 transitions, 1324 flow [2023-08-03 18:55:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 18:55:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 18:55:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1387 transitions. [2023-08-03 18:55:50,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5486550632911392 [2023-08-03 18:55:50,528 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1387 transitions. [2023-08-03 18:55:50,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1387 transitions. [2023-08-03 18:55:50,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:55:50,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1387 transitions. [2023-08-03 18:55:50,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 86.6875) internal successors, (1387), 16 states have internal predecessors, (1387), 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 18:55:50,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 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 18:55:50,534 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 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 18:55:50,534 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 136 flow. Second operand 16 states and 1387 transitions. [2023-08-03 18:55:50,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 233 transitions, 1324 flow [2023-08-03 18:55:50,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 233 transitions, 1315 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 18:55:50,538 INFO L231 Difference]: Finished difference. Result has 70 places, 145 transitions, 891 flow [2023-08-03 18:55:50,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=891, PETRI_PLACES=70, PETRI_TRANSITIONS=145} [2023-08-03 18:55:50,539 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 33 predicate places. [2023-08-03 18:55:50,539 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 145 transitions, 891 flow [2023-08-03 18:55:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 77.0) internal successors, (847), 11 states have internal predecessors, (847), 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 18:55:50,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:55:50,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:50,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 18:55:50,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:55:50,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 18:55:50,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:55:50,745 INFO L85 PathProgramCache]: Analyzing trace with hash -312092214, now seen corresponding path program 1 times [2023-08-03 18:55:50,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:55:50,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990095108] [2023-08-03 18:55:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:55:50,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:55:50,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:55:50,755 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:55:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:55:50,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:55:50,769 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:55:50,769 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 18:55:50,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 18:55:50,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 18:55:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 18:55:50,769 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:55:50,772 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 18:55:50,772 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 18:55:50,800 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 06:55:50 BasicIcfg [2023-08-03 18:55:50,800 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 18:55:50,800 INFO L158 Benchmark]: Toolchain (without parser) took 8259.54ms. Allocated memory was 354.4MB in the beginning and 973.1MB in the end (delta: 618.7MB). Free memory was 291.7MB in the beginning and 843.4MB in the end (delta: -551.7MB). Peak memory consumption was 67.8MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,800 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 354.4MB. Free memory is still 302.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 18:55:50,800 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.98ms. Allocated memory is still 354.4MB. Free memory was 291.4MB in the beginning and 271.3MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,801 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.48ms. Allocated memory was 354.4MB in the beginning and 608.2MB in the end (delta: 253.8MB). Free memory was 271.3MB in the beginning and 574.2MB in the end (delta: -302.9MB). Peak memory consumption was 9.0MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,801 INFO L158 Benchmark]: Boogie Preprocessor took 15.45ms. Allocated memory is still 608.2MB. Free memory was 573.6MB in the beginning and 572.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,801 INFO L158 Benchmark]: RCFGBuilder took 229.51ms. Allocated memory is still 608.2MB. Free memory was 572.1MB in the beginning and 558.3MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,801 INFO L158 Benchmark]: TraceAbstraction took 7693.13ms. Allocated memory was 608.2MB in the beginning and 973.1MB in the end (delta: 364.9MB). Free memory was 557.4MB in the beginning and 843.4MB in the end (delta: -286.0MB). Peak memory consumption was 77.7MB. Max. memory is 16.0GB. [2023-08-03 18:55:50,802 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 354.4MB. Free memory is still 302.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 267.98ms. Allocated memory is still 354.4MB. Free memory was 291.4MB in the beginning and 271.3MB in the end (delta: 20.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.48ms. Allocated memory was 354.4MB in the beginning and 608.2MB in the end (delta: 253.8MB). Free memory was 271.3MB in the beginning and 574.2MB in the end (delta: -302.9MB). Peak memory consumption was 9.0MB. Max. memory is 16.0GB. * Boogie Preprocessor took 15.45ms. Allocated memory is still 608.2MB. Free memory was 573.6MB in the beginning and 572.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 229.51ms. Allocated memory is still 608.2MB. Free memory was 572.1MB in the beginning and 558.3MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 7693.13ms. Allocated memory was 608.2MB in the beginning and 973.1MB in the end (delta: 364.9MB). Free memory was 557.4MB in the beginning and 843.4MB in the end (delta: -286.0MB). Peak memory consumption was 77.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 74 PlacesBefore, 23 PlacesAfterwards, 72 TransitionsBefore, 19 TransitionsAfterwards, 876 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 2 ChoiceCompositions, 61 TotalNumberOfCompositions, 1562 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 816, independent: 761, independent conditional: 0, independent unconditional: 761, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 472, independent: 455, independent conditional: 0, independent unconditional: 455, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 816, independent: 306, independent conditional: 0, independent unconditional: 306, dependent: 38, dependent conditional: 0, dependent unconditional: 38, unknown: 472, unknown conditional: 0, unknown unconditional: 472] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 92 PlacesBefore, 37 PlacesAfterwards, 86 TransitionsBefore, 28 TransitionsAfterwards, 2088 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 4284 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2142, independent: 2035, independent conditional: 0, independent unconditional: 2035, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1058, independent: 1031, independent conditional: 0, independent unconditional: 1031, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2142, independent: 1004, independent conditional: 0, independent unconditional: 1004, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 1058, unknown conditional: 0, unknown unconditional: 1058] , Statistics on independence cache: Total cache size (in pairs): 94, Positive cache size: 83, Positive conditional cache size: 0, Positive unconditional cache size: 83, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p0_EAX = 0; [L712] 0 int __unbuffered_p1_EAX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L718] 0 int y = 0; [L764] 0 pthread_t t2625[2]; [L765] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=-1, t2625={5:0}, x=0, y=0] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=0] [L765] COND TRUE 0 asdf<2 [L722] 1 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 1 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] FCALL, FORK 0 pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2625[asdf], ((void *)0), P0, ((void *)0))=0, t2625={5:0}, x=0, y=1] [L765] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, x=0, y=1] [L722] 2 y = 1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L727] 2 __unbuffered_p0_EAX = x VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=1] [L765] COND FALSE 0 !(asdf<2) [L766] 0 pthread_t t2626[2]; [L767] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=1, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] COND TRUE 0 asdf<2 [L767] FCALL, FORK 0 pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2626[asdf], ((void *)0), P1, ((void *)0))=2, t2625={5:0}, t2626={3:0}, x=0, y=1] [L767] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2625={5:0}, t2626={3:0}, x=0, y=1] [L732] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 1 return 0; [L732] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L734] 2 return 0; [L767] COND FALSE 0 !(asdf<2) [L769] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L771] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) [L771] RET 0 assume_abort_if_not(main$tmp_guard0) [L775] 0 main$tmp_guard1 = !(__unbuffered_p0_EAX == 0 && __unbuffered_p1_EAX == 0) [L777] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=0, y=1] - UnprovableResult [Line: 765]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 767]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 107 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.9s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 350 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 292 mSDsluCounter, 64 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 52 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 853 IncrementalHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 12 mSDtfsCounter, 853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=891occurred in iteration=8, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 238 ConstructedInterpolants, 0 QuantifiedInterpolants, 891 SizeOfPredicates, 1 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 98/121 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 18:55:50,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...