/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_06-cond_racing1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:23:34,823 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:23:34,898 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:23:34,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:23:34,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:23:34,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:23:34,905 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:23:34,931 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:23:34,931 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:23:34,935 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:23:34,936 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:23:34,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:23:34,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:23:34,938 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:23:34,938 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:23:34,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:23:34,938 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:23:34,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:23:34,939 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:23:34,939 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:23:34,939 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:23:34,940 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:23:34,940 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:23:34,940 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:23:34,940 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:23:34,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:23:34,941 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:23:34,941 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:23:34,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:23:34,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:23:34,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:34,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:23:34,943 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:23:34,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:23:34,944 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:23:34,944 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:23:34,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:23:35,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:23:35,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:23:35,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:23:35,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:23:35,224 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:23:35,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_06-cond_racing1_bound2.i [2023-08-03 21:23:36,236 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:23:36,520 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:23:36,520 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_06-cond_racing1_bound2.i [2023-08-03 21:23:36,539 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e00f2c5e5/597fadd939054408ad55cd047a91e9d0/FLAGbe58e4f87 [2023-08-03 21:23:36,844 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e00f2c5e5/597fadd939054408ad55cd047a91e9d0 [2023-08-03 21:23:36,846 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:23:36,847 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:23:36,848 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:36,848 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:23:36,851 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:23:36,852 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@711fa65a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:36, skipping insertion in model container [2023-08-03 21:23:36,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:23:36" (1/1) ... [2023-08-03 21:23:36,898 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:23:37,247 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_06-cond_racing1_bound2.i[41322,41335] [2023-08-03 21:23:37,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:37,271 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:23:37,299 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [119] [2023-08-03 21:23:37,310 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-03 21:23:37,311 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [481] [2023-08-03 21:23:37,331 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_06-cond_racing1_bound2.i[41322,41335] [2023-08-03 21:23:37,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:23:37,410 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:23:37,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37 WrapperNode [2023-08-03 21:23:37,410 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:23:37,412 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:37,412 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:23:37,412 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:23:37,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,477 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-08-03 21:23:37,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:23:37,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:23:37,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:23:37,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:23:37,493 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,504 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,517 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,527 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:23:37,528 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:23:37,528 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:23:37,528 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:23:37,529 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (1/1) ... [2023-08-03 21:23:37,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:23:37,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:37,562 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 21:23:37,585 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 21:23:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:23:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:23:37,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:23:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:23:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:23:37,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:23:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:23:37,600 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:23:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:23:37,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:23:37,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:23:37,602 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 21:23:37,725 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:23:37,726 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:23:37,885 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:23:37,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:23:37,891 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 21:23:37,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:37 BoogieIcfgContainer [2023-08-03 21:23:37,895 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:23:37,898 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:23:37,899 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:23:37,901 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:23:37,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:23:36" (1/3) ... [2023-08-03 21:23:37,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5b95a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:37, skipping insertion in model container [2023-08-03 21:23:37,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:23:37" (2/3) ... [2023-08-03 21:23:37,902 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5b95a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:23:37, skipping insertion in model container [2023-08-03 21:23:37,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:23:37" (3/3) ... [2023-08-03 21:23:37,904 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_06-cond_racing1_bound2.i [2023-08-03 21:23:37,909 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:23:37,916 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:23:37,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:23:37,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:23:37,969 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:23:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 119 transitions, 246 flow [2023-08-03 21:23:38,103 INFO L124 PetriNetUnfolderBase]: 23/161 cut-off events. [2023-08-03 21:23:38,104 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:23:38,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 161 events. 23/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-03 21:23:38,111 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 119 transitions, 246 flow [2023-08-03 21:23:38,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 114 transitions, 233 flow [2023-08-03 21:23:38,120 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:38,155 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-03 21:23:38,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 114 transitions, 233 flow [2023-08-03 21:23:38,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 114 transitions, 233 flow [2023-08-03 21:23:38,207 INFO L124 PetriNetUnfolderBase]: 22/156 cut-off events. [2023-08-03 21:23:38,207 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:38,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 22/156 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 350 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 79. Up to 6 conditions per place. [2023-08-03 21:23:38,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2023-08-03 21:23:41,309 INFO L134 LiptonReduction]: Checked pairs total: 4411 [2023-08-03 21:23:41,309 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 21:23:41,319 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:41,324 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;@2ec6b9bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:41,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:41,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:41,329 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-08-03 21:23:41,329 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:41,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:41,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:23:41,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:41,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:41,335 INFO L85 PathProgramCache]: Analyzing trace with hash 690972307, now seen corresponding path program 1 times [2023-08-03 21:23:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:41,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078367762] [2023-08-03 21:23:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:41,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:41,450 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:23:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:41,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:23:41,502 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:23:41,503 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:23:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:23:41,506 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:23:41,512 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:23:41,513 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:23:41,513 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:23:41,541 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:23:41,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,601 INFO L124 PetriNetUnfolderBase]: 40/257 cut-off events. [2023-08-03 21:23:41,601 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:41,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-03 21:23:41,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,608 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,609 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:41,609 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:41,633 INFO L124 PetriNetUnfolderBase]: 40/257 cut-off events. [2023-08-03 21:23:41,634 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:41,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-03 21:23:41,641 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-03 21:23:44,691 INFO L134 LiptonReduction]: Checked pairs total: 17120 [2023-08-03 21:23:44,691 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 21:23:44,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:23:44,694 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;@2ec6b9bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:44,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:44,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:44,701 INFO L124 PetriNetUnfolderBase]: 13/60 cut-off events. [2023-08-03 21:23:44,701 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:23:44,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:44,701 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:23:44,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:23:44,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:44,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1652856533, now seen corresponding path program 1 times [2023-08-03 21:23:44,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:44,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828987938] [2023-08-03 21:23:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:44,903 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 21:23:44,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:44,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828987938] [2023-08-03 21:23:44,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828987938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:23:44,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517723932] [2023-08-03 21:23:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:44,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:44,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:44,911 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 21:23:44,930 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 21:23:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:45,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:23:45,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:23:45,054 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 21:23:45,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:23:45,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517723932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:45,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:23:45,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:23:45,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908501994] [2023-08-03 21:23:45,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:45,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:45,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:45,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:23:45,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 264 [2023-08-03 21:23:45,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 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 21:23:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:45,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 264 [2023-08-03 21:23:45,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:45,426 INFO L124 PetriNetUnfolderBase]: 1338/2290 cut-off events. [2023-08-03 21:23:45,426 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-03 21:23:45,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4505 conditions, 2290 events. 1338/2290 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13169 event pairs, 469 based on Foata normal form. 274/2333 useless extension candidates. Maximal degree in co-relation 596. Up to 2018 conditions per place. [2023-08-03 21:23:45,432 INFO L140 encePairwiseOnDemand]: 245/264 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-03 21:23:45,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 266 flow [2023-08-03 21:23:45,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:23:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:23:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 701 transitions. [2023-08-03 21:23:45,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.531060606060606 [2023-08-03 21:23:45,448 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 701 transitions. [2023-08-03 21:23:45,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 701 transitions. [2023-08-03 21:23:45,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:45,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 701 transitions. [2023-08-03 21:23:45,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.2) internal successors, (701), 5 states have internal predecessors, (701), 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 21:23:45,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 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 21:23:45,463 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 264.0) internal successors, (1584), 6 states have internal predecessors, (1584), 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 21:23:45,465 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 5 states and 701 transitions. [2023-08-03 21:23:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 266 flow [2023-08-03 21:23:45,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:23:45,470 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2023-08-03 21:23:45,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2023-08-03 21:23:45,475 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-03 21:23:45,475 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2023-08-03 21:23:45,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 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 21:23:45,476 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:23:45,485 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 21:23:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:45,683 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:23:45,684 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:23:45,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,714 INFO L124 PetriNetUnfolderBase]: 40/257 cut-off events. [2023-08-03 21:23:45,714 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:45,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-03 21:23:45,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,717 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:23:45,717 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 149 transitions, 316 flow [2023-08-03 21:23:45,741 INFO L124 PetriNetUnfolderBase]: 40/257 cut-off events. [2023-08-03 21:23:45,741 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:23:45,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 40/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 722 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 163. Up to 9 conditions per place. [2023-08-03 21:23:45,747 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-03 21:23:48,547 INFO L134 LiptonReduction]: Checked pairs total: 17120 [2023-08-03 21:23:48,547 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-03 21:23:48,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:23:48,550 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;@2ec6b9bd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:23:48,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:23:48,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:23:48,552 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-03 21:23:48,552 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:23:48,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:48,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:23:48,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:48,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash 26747123, now seen corresponding path program 1 times [2023-08-03 21:23:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392117452] [2023-08-03 21:23:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:48,586 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 21:23:48,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392117452] [2023-08-03 21:23:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392117452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:48,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:48,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:23:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439628572] [2023-08-03 21:23:48,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:48,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:23:48,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:23:48,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:23:48,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 264 [2023-08-03 21:23:48,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 21:23:48,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:48,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 264 [2023-08-03 21:23:48,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:48,815 INFO L124 PetriNetUnfolderBase]: 1446/2610 cut-off events. [2023-08-03 21:23:48,816 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-03 21:23:48,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 2610 events. 1446/2610 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15971 event pairs, 648 based on Foata normal form. 290/2602 useless extension candidates. Maximal degree in co-relation 669. Up to 2327 conditions per place. [2023-08-03 21:23:48,825 INFO L140 encePairwiseOnDemand]: 246/264 looper letters, 28 selfloop transitions, 2 changer transitions 12/51 dead transitions. [2023-08-03 21:23:48,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2023-08-03 21:23:48,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:23:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:23:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-03 21:23:48,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441919191919192 [2023-08-03 21:23:48,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-03 21:23:48,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-03 21:23:48,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:48,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-03 21:23:48,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 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 21:23:48,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 21:23:48,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 21:23:48,832 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 431 transitions. [2023-08-03 21:23:48,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2023-08-03 21:23:48,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:23:48,835 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 82 flow [2023-08-03 21:23:48,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2023-08-03 21:23:48,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-03 21:23:48,837 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 82 flow [2023-08-03 21:23:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 21:23:48,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:48,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:48,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:23:48,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:48,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2048393874, now seen corresponding path program 1 times [2023-08-03 21:23:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844685942] [2023-08-03 21:23:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:48,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:48,926 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 21:23:48,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:48,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844685942] [2023-08-03 21:23:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844685942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:23:48,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721405440] [2023-08-03 21:23:48,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:48,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:23:48,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:23:48,930 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 21:23:48,960 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 21:23:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:49,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:23:49,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:23:49,020 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 21:23:49,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:23:49,036 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 21:23:49,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721405440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:23:49,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:23:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:23:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769008806] [2023-08-03 21:23:49,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:23:49,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:49,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:23:49,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 264 [2023-08-03 21:23:49,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 124.2) internal successors, (621), 5 states have internal predecessors, (621), 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 21:23:49,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:49,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 264 [2023-08-03 21:23:49,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:49,166 INFO L124 PetriNetUnfolderBase]: 616/1099 cut-off events. [2023-08-03 21:23:49,166 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2023-08-03 21:23:49,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2286 conditions, 1099 events. 616/1099 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5575 event pairs, 230 based on Foata normal form. 7/1102 useless extension candidates. Maximal degree in co-relation 1559. Up to 693 conditions per place. [2023-08-03 21:23:49,172 INFO L140 encePairwiseOnDemand]: 260/264 looper letters, 41 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2023-08-03 21:23:49,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 216 flow [2023-08-03 21:23:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:23:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:23:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2023-08-03 21:23:49,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2023-08-03 21:23:49,178 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2023-08-03 21:23:49,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2023-08-03 21:23:49,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:49,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2023-08-03 21:23:49,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 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 21:23:49,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 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 21:23:49,183 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 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 21:23:49,183 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 82 flow. Second operand 4 states and 534 transitions. [2023-08-03 21:23:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 216 flow [2023-08-03 21:23:49,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:23:49,185 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-03 21:23:49,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-03 21:23:49,186 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-03 21:23:49,187 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-03 21:23:49,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.2) internal successors, (621), 5 states have internal predecessors, (621), 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 21:23:49,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:49,187 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:49,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:23:49,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 21:23:49,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:49,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1868823816, now seen corresponding path program 1 times [2023-08-03 21:23:49,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:49,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236410463] [2023-08-03 21:23:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:49,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 21:23:49,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:49,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236410463] [2023-08-03 21:23:49,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236410463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:49,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:49,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:23:49,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031953154] [2023-08-03 21:23:49,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:49,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:23:49,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:49,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:23:49,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:23:49,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 264 [2023-08-03 21:23:49,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 21:23:49,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:49,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 264 [2023-08-03 21:23:49,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:49,619 INFO L124 PetriNetUnfolderBase]: 646/1150 cut-off events. [2023-08-03 21:23:49,619 INFO L125 PetriNetUnfolderBase]: For 807/807 co-relation queries the response was YES. [2023-08-03 21:23:49,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 1150 events. 646/1150 cut-off events. For 807/807 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5670 event pairs, 262 based on Foata normal form. 9/1155 useless extension candidates. Maximal degree in co-relation 1953. Up to 979 conditions per place. [2023-08-03 21:23:49,625 INFO L140 encePairwiseOnDemand]: 260/264 looper letters, 34 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-03 21:23:49,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 214 flow [2023-08-03 21:23:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:23:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:23:49,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-03 21:23:49,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2023-08-03 21:23:49,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-03 21:23:49,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-03 21:23:49,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:49,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-03 21:23:49,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:23:49,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 21:23:49,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 264.0) internal successors, (1056), 4 states have internal predecessors, (1056), 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 21:23:49,631 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 3 states and 402 transitions. [2023-08-03 21:23:49,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 214 flow [2023-08-03 21:23:49,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 202 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 21:23:49,633 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 106 flow [2023-08-03 21:23:49,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-08-03 21:23:49,634 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -2 predicate places. [2023-08-03 21:23:49,634 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 106 flow [2023-08-03 21:23:49,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 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 21:23:49,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:49,635 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:49,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:23:49,635 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:49,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1540233437, now seen corresponding path program 1 times [2023-08-03 21:23:49,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:49,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143864637] [2023-08-03 21:23:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:23:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:23:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:23:49,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143864637] [2023-08-03 21:23:49,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143864637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:23:49,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:23:49,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:23:49,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025669881] [2023-08-03 21:23:49,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:23:49,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:23:49,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:23:49,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:23:49,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:23:49,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 264 [2023-08-03 21:23:49,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 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 21:23:49,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:23:49,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 264 [2023-08-03 21:23:49,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:23:49,928 INFO L124 PetriNetUnfolderBase]: 298/703 cut-off events. [2023-08-03 21:23:49,929 INFO L125 PetriNetUnfolderBase]: For 441/441 co-relation queries the response was YES. [2023-08-03 21:23:49,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 703 events. 298/703 cut-off events. For 441/441 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3551 event pairs, 140 based on Foata normal form. 113/814 useless extension candidates. Maximal degree in co-relation 928. Up to 301 conditions per place. [2023-08-03 21:23:49,932 INFO L140 encePairwiseOnDemand]: 252/264 looper letters, 30 selfloop transitions, 12 changer transitions 0/51 dead transitions. [2023-08-03 21:23:49,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 245 flow [2023-08-03 21:23:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:23:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:23:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 492 transitions. [2023-08-03 21:23:49,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2023-08-03 21:23:49,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 492 transitions. [2023-08-03 21:23:49,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 492 transitions. [2023-08-03 21:23:49,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:23:49,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 492 transitions. [2023-08-03 21:23:49,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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 21:23:49,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 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 21:23:49,938 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 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 21:23:49,939 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 106 flow. Second operand 4 states and 492 transitions. [2023-08-03 21:23:49,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 245 flow [2023-08-03 21:23:49,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:23:49,941 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 162 flow [2023-08-03 21:23:49,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=264, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2023-08-03 21:23:49,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-03 21:23:49,942 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 162 flow [2023-08-03 21:23:49,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.2) internal successors, (571), 5 states have internal predecessors, (571), 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 21:23:49,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:23:49,942 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:23:49,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:23:49,943 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:23:49,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:23:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 813452055, now seen corresponding path program 1 times [2023-08-03 21:23:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:23:49,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361303155] [2023-08-03 21:23:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:23:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:23:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:49,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:23:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:23:49,971 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:23:49,971 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:23:49,971 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 21:23:49,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:23:49,972 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-03 21:23:49,972 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-03 21:23:49,974 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:23:49,974 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:23:50,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:23:50 BasicIcfg [2023-08-03 21:23:50,002 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:23:50,003 INFO L158 Benchmark]: Toolchain (without parser) took 13155.86ms. Allocated memory was 572.5MB in the beginning and 687.9MB in the end (delta: 115.3MB). Free memory was 527.1MB in the beginning and 353.1MB in the end (delta: 174.0MB). Peak memory consumption was 289.7MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,003 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:23:50,003 INFO L158 Benchmark]: CACSL2BoogieTranslator took 563.10ms. Allocated memory is still 572.5MB. Free memory was 527.1MB in the beginning and 498.2MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,003 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.91ms. Allocated memory is still 572.5MB. Free memory was 498.2MB in the beginning and 496.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,004 INFO L158 Benchmark]: Boogie Preprocessor took 49.16ms. Allocated memory is still 572.5MB. Free memory was 496.0MB in the beginning and 494.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,004 INFO L158 Benchmark]: RCFGBuilder took 367.40ms. Allocated memory is still 572.5MB. Free memory was 494.0MB in the beginning and 478.8MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,004 INFO L158 Benchmark]: TraceAbstraction took 12104.05ms. Allocated memory was 572.5MB in the beginning and 687.9MB in the end (delta: 115.3MB). Free memory was 478.0MB in the beginning and 353.1MB in the end (delta: 124.9MB). Peak memory consumption was 241.5MB. Max. memory is 16.0GB. [2023-08-03 21:23:50,005 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 350.2MB. Free memory is still 297.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 563.10ms. Allocated memory is still 572.5MB. Free memory was 527.1MB in the beginning and 498.2MB in the end (delta: 28.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 65.91ms. Allocated memory is still 572.5MB. Free memory was 498.2MB in the beginning and 496.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 49.16ms. Allocated memory is still 572.5MB. Free memory was 496.0MB in the beginning and 494.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 367.40ms. Allocated memory is still 572.5MB. Free memory was 494.0MB in the beginning and 478.8MB in the end (delta: 15.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 12104.05ms. Allocated memory was 572.5MB in the beginning and 687.9MB in the end (delta: 115.3MB). Free memory was 478.0MB in the beginning and 353.1MB in the end (delta: 124.9MB). Peak memory consumption was 241.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 119]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [119] - GenericResultAtLocation [Line: 481]: Unsoundness Warning unspecified type, defaulting to int C: short [481] - GenericResultAtLocation [Line: 481]: Unsoundness Warning unspecified type, defaulting to int C: short [481] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 103 PlacesBefore, 27 PlacesAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 2688 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 4 ChoiceCompositions, 98 TotalNumberOfCompositions, 4411 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2203, independent: 2067, independent conditional: 0, independent unconditional: 2067, dependent: 136, dependent conditional: 0, dependent unconditional: 136, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1413, independent: 1377, independent conditional: 0, independent unconditional: 1377, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2203, independent: 690, independent conditional: 0, independent unconditional: 690, dependent: 100, dependent conditional: 0, dependent unconditional: 100, unknown: 1413, unknown conditional: 0, unknown unconditional: 1413] , Statistics on independence cache: Total cache size (in pairs): 51, Positive cache size: 36, Positive conditional cache size: 0, Positive unconditional cache size: 36, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 132 PlacesBefore, 45 PlacesAfterwards, 149 TransitionsBefore, 57 TransitionsAfterwards, 7560 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 115 TotalNumberOfCompositions, 17120 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7648, independent: 7379, independent conditional: 0, independent unconditional: 7379, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3838, independent: 3781, independent conditional: 0, independent unconditional: 3781, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7648, independent: 3598, independent conditional: 0, independent unconditional: 3598, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 3838, unknown conditional: 0, unknown unconditional: 3838] , Statistics on independence cache: Total cache size (in pairs): 300, Positive cache size: 275, Positive conditional cache size: 0, Positive unconditional cache size: 275, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 132 PlacesBefore, 45 PlacesAfterwards, 149 TransitionsBefore, 57 TransitionsAfterwards, 7560 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 115 TotalNumberOfCompositions, 17120 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7658, independent: 7389, independent conditional: 0, independent unconditional: 7389, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3871, independent: 3799, independent conditional: 0, independent unconditional: 3799, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7658, independent: 3590, independent conditional: 0, independent unconditional: 3590, dependent: 197, dependent conditional: 0, dependent unconditional: 197, unknown: 3871, unknown conditional: 0, unknown unconditional: 3871] , Statistics on independence cache: Total cache size (in pairs): 281, Positive cache size: 253, Positive conditional cache size: 0, Positive unconditional cache size: 253, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 928]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L933] 0 pthread_mutex_t __global_lock = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L934] 0 int global = 0; [L935] 0 pthread_mutex_t mutex1 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L936] 0 pthread_mutex_t mutex2 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L944] 0 int i = __VERIFIER_nondet_int(); [L945] 0 pthread_t t_ids[2]; [L945] 0 int i=0; VAL [__global_lock={3:0}, global=0, i=0, i=1, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L945] COND TRUE 0 i<2 [L945] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, global=0, i=0, i=1, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-2, t_ids={6:0}] [L945] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, global=0, i=1, i=1, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L945] COND TRUE 0 i<2 [L939] 1 (global)++ [L945] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=1, i=1, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-1, t_ids={6:0}] [L945] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=1, i=2, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L945] COND FALSE 0 !(i<2) [L947] COND TRUE 0 \read(i) [L949] COND TRUE 0 \read(i) VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=1, i=2, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L949] CALL 0 __VERIFIER_assert((global) == 0) [L928] COND TRUE 0 !(cond) [L928] 0 reach_error() VAL [\old(cond)=0, __global_lock={3:0}, arg={0:0}, arg={0:0}, cond=0, global=1, mutex1={4:0}, mutex2={5:0}] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 128 locations, 2 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: 3.5s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 151 locations, 2 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: 4.1s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 71 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 62 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 106 IncrementalHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 106 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 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 1 thread instances CFG has 4 procedures, 151 locations, 2 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: 4.3s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 193 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 117 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 365 IncrementalHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 1 mSDtfsCounter, 365 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=4, InterpolantAutomatonStates: 14, 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, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 12/15 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 21:23:50,023 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...