/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_safe028_power_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 18:47:19,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 18:47:19,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 18:47:19,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 18:47:19,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 18:47:19,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 18:47:19,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 18:47:19,274 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 18:47:19,274 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 18:47:19,275 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 18:47:19,275 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 18:47:19,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 18:47:19,276 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 18:47:19,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 18:47:19,276 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 18:47:19,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 18:47:19,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 18:47:19,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 18:47:19,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 18:47:19,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 18:47:19,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 18:47:19,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 18:47:19,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 18:47:19,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 18:47:19,285 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 18:47:19,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 18:47:19,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 18:47:19,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 18:47:19,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 18:47:19,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 18:47:19,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:47:19,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 18:47:19,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 18:47:19,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 18:47:19,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 18:47:19,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 18:47:19,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 18:47:19,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 18:47:19,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 18:47:19,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 18:47:19,289 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 18:47:19,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 18:47:19,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 18:47:19,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 18:47:19,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 18:47:19,535 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 18:47:19,535 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 18:47:19,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_power_bound2.i [2023-08-03 18:47:20,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 18:47:20,892 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 18:47:20,893 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_power_bound2.i [2023-08-03 18:47:20,909 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e97fc098/d1e8b2b46a3746039187e78fdf670ffb/FLAG9676f17b2 [2023-08-03 18:47:20,922 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e97fc098/d1e8b2b46a3746039187e78fdf670ffb [2023-08-03 18:47:20,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 18:47:20,926 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 18:47:20,927 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 18:47:20,927 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 18:47:20,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 18:47:20,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:47:20" (1/1) ... [2023-08-03 18:47:20,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec77105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:20, skipping insertion in model container [2023-08-03 18:47:20,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 06:47:20" (1/1) ... [2023-08-03 18:47:21,017 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 18:47:21,192 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_safe028_power_bound2.i[990,1003] [2023-08-03 18:47:21,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:47:21,433 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 18:47:21,444 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_safe028_power_bound2.i[990,1003] [2023-08-03 18:47:21,463 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:47:21,464 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 18:47:21,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 18:47:21,555 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:47:21,555 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 18:47:21,561 INFO L206 MainTranslator]: Completed translation [2023-08-03 18:47:21,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21 WrapperNode [2023-08-03 18:47:21,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 18:47:21,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 18:47:21,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 18:47:21,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 18:47:21,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,611 INFO L138 Inliner]: procedures = 176, calls = 77, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 202 [2023-08-03 18:47:21,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 18:47:21,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 18:47:21,612 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 18:47:21,612 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 18:47:21,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,666 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 18:47:21,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 18:47:21,677 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 18:47:21,677 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 18:47:21,678 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (1/1) ... [2023-08-03 18:47:21,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 18:47:21,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:47:21,706 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 18:47:21,709 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 18:47:21,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 18:47:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 18:47:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 18:47:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 18:47:21,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 18:47:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 18:47:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 18:47:21,738 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 18:47:21,738 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 18:47:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 18:47:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 18:47:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 18:47:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 18:47:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 18:47:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 18:47:21,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 18:47:21,741 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 18:47:21,889 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 18:47:21,892 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 18:47:22,354 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 18:47:22,624 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 18:47:22,625 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 18:47:22,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:47:22 BoogieIcfgContainer [2023-08-03 18:47:22,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 18:47:22,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 18:47:22,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 18:47:22,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 18:47:22,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 06:47:20" (1/3) ... [2023-08-03 18:47:22,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed66206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:47:22, skipping insertion in model container [2023-08-03 18:47:22,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 06:47:21" (2/3) ... [2023-08-03 18:47:22,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed66206 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 06:47:22, skipping insertion in model container [2023-08-03 18:47:22,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 06:47:22" (3/3) ... [2023-08-03 18:47:22,635 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe028_power_bound2.i [2023-08-03 18:47:22,643 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 18:47:22,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 18:47:22,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 18:47:22,652 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 18:47:22,719 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:47:22,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,864 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 18:47:22,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:47:22,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1937 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 18:47:22,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:47:22,888 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,891 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 18:47:22,983 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 18:47:22,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:47:22,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1937 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 18:47:22,992 INFO L119 LiptonReduction]: Number of co-enabled transitions 2396 [2023-08-03 18:47:29,754 INFO L134 LiptonReduction]: Checked pairs total: 5978 [2023-08-03 18:47:29,754 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-03 18:47:29,772 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:47:29,777 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;@25951088, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:47:29,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 18:47:29,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:47:29,782 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-03 18:47:29,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:47:29,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:47:29,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:47:29,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 18:47:29,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:47:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash 906523150, now seen corresponding path program 1 times [2023-08-03 18:47:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:47:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658011471] [2023-08-03 18:47:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:47:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:47:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:47:30,085 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 18:47:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:47:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658011471] [2023-08-03 18:47:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658011471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:47:30,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:47:30,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:47:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576686783] [2023-08-03 18:47:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:47:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:47:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:47:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:47:30,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:47:30,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 274 [2023-08-03 18:47:30,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 18:47:30,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:47:30,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 274 [2023-08-03 18:47:30,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:47:30,836 INFO L124 PetriNetUnfolderBase]: 2161/3395 cut-off events. [2023-08-03 18:47:30,836 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 18:47:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6833 conditions, 3395 events. 2161/3395 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17859 event pairs, 1312 based on Foata normal form. 120/2915 useless extension candidates. Maximal degree in co-relation 6812. Up to 3294 conditions per place. [2023-08-03 18:47:30,890 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 30 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2023-08-03 18:47:30,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 36 transitions, 151 flow [2023-08-03 18:47:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:47:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:47:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-03 18:47:30,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975669099756691 [2023-08-03 18:47:30,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-03 18:47:30,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-03 18:47:30,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:47:30,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-03 18:47:30,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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 18:47:30,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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 18:47:30,917 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 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 18:47:30,919 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 81 flow. Second operand 3 states and 409 transitions. [2023-08-03 18:47:30,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 36 transitions, 151 flow [2023-08-03 18:47:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 151 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 18:47:30,923 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 87 flow [2023-08-03 18:47:30,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-03 18:47:30,927 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-03 18:47:30,927 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 87 flow [2023-08-03 18:47:30,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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 18:47:30,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:47:30,928 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 18:47:30,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 18:47:30,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 18:47:30,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:47:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1976299735, now seen corresponding path program 1 times [2023-08-03 18:47:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:47:30,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505192057] [2023-08-03 18:47:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:47:30,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:47:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:47:30,950 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 18:47:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 18:47:30,982 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 18:47:30,982 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 18:47:30,983 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 18:47:30,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 18:47:30,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 18:47:30,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 18:47:30,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 18:47:30,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 18:47:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 18:47:30,986 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 18:47:30,988 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 18:47:30,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 18:47:31,039 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 18:47:31,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,268 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 18:47:31,268 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:47:31,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9345 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 18:47:31,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 18:47:31,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 18:47:31,438 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 18:47:31,438 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 18:47:31,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9345 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 18:47:31,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 5708 [2023-08-03 18:47:39,557 INFO L134 LiptonReduction]: Checked pairs total: 18122 [2023-08-03 18:47:39,558 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-03 18:47:39,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 18:47:39,560 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;@25951088, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 18:47:39,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 18:47:39,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 18:47:39,563 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-03 18:47:39,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 18:47:39,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:47:39,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 18:47:39,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 18:47:39,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:47:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1218609407, now seen corresponding path program 1 times [2023-08-03 18:47:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:47:39,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455302720] [2023-08-03 18:47:39,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:47:39,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:47:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:47:39,626 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 18:47:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:47:39,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455302720] [2023-08-03 18:47:39,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455302720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 18:47:39,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 18:47:39,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 18:47:39,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978712696] [2023-08-03 18:47:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 18:47:39,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 18:47:39,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:47:39,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 18:47:39,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 18:47:39,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 304 [2023-08-03 18:47:39,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 18:47:39,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:47:39,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 304 [2023-08-03 18:47:39,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 18:49:06,476 INFO L124 PetriNetUnfolderBase]: 468866/610013 cut-off events. [2023-08-03 18:49:06,476 INFO L125 PetriNetUnfolderBase]: For 9312/9312 co-relation queries the response was YES. [2023-08-03 18:49:08,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209111 conditions, 610013 events. 468866/610013 cut-off events. For 9312/9312 co-relation queries the response was YES. Maximal size of possible extension queue 13592. Compared 4100382 event pairs, 380024 based on Foata normal form. 13020/537137 useless extension candidates. Maximal degree in co-relation 260758. Up to 587323 conditions per place. [2023-08-03 18:49:10,197 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 44 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-03 18:49:10,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 54 transitions, 236 flow [2023-08-03 18:49:10,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 18:49:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 18:49:10,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-03 18:49:10,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098684210526315 [2023-08-03 18:49:10,201 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-03 18:49:10,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-03 18:49:10,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 18:49:10,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-03 18:49:10,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 18:49:10,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 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 18:49:10,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 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 18:49:10,209 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 136 flow. Second operand 3 states and 465 transitions. [2023-08-03 18:49:10,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 54 transitions, 236 flow [2023-08-03 18:49:10,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 54 transitions, 230 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 18:49:10,228 INFO L231 Difference]: Finished difference. Result has 65 places, 50 transitions, 140 flow [2023-08-03 18:49:10,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=50} [2023-08-03 18:49:10,229 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 3 predicate places. [2023-08-03 18:49:10,229 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 50 transitions, 140 flow [2023-08-03 18:49:10,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 18:49:10,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 18:49:10,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 18:49:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 18:49:10,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 18:49:10,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 18:49:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1637618533, now seen corresponding path program 1 times [2023-08-03 18:49:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 18:49:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407753252] [2023-08-03 18:49:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:49:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 18:49:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:49:10,304 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 18:49:10,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 18:49:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407753252] [2023-08-03 18:49:10,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407753252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 18:49:10,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190618636] [2023-08-03 18:49:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 18:49:10,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 18:49:10,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 18:49:10,309 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 18:49:10,313 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 18:49:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 18:49:10,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 18:49:10,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 18:49:10,468 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 18:49:10,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 18:49:10,490 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 18:49:10,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190618636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 18:49:10,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 18:49:10,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 18:49:10,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234485698] [2023-08-03 18:49:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 18:49:10,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 18:49:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 18:49:10,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 18:49:10,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 18:49:10,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 304 [2023-08-03 18:49:10,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 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 18:49:10,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 18:49:10,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 304 [2023-08-03 18:49:10,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand