/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:52:30,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:52:30,282 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 06:52:30,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:52:30,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:52:30,318 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:52:30,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:52:30,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:52:30,320 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:52:30,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:52:30,324 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:52:30,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:52:30,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:52:30,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:52:30,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:52:30,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:52:30,327 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:52:30,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:52:30,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:52:30,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:52:30,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:52:30,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:52:30,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:52:30,329 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:52:30,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:52:30,330 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:52:30,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:52:30,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:52:30,330 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:52:30,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:52:30,332 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:52:30,332 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:52:30,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:52:30,332 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:52:30,332 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:52:30,333 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:52:30,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:52:30,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:52:30,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:52:30,679 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:52:30,680 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:52:30,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-08-24 06:52:31,860 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:52:32,136 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:52:32,137 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i [2023-08-24 06:52:32,159 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a17a0c5d/a1f66bb2d04a41309eeff0a28a32482a/FLAG7f40dd0e7 [2023-08-24 06:52:32,174 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a17a0c5d/a1f66bb2d04a41309eeff0a28a32482a [2023-08-24 06:52:32,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:52:32,177 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:52:32,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:52:32,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:52:32,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:52:32,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138faab8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32, skipping insertion in model container [2023-08-24 06:52:32,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,229 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:52:32,652 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-08-24 06:52:32,663 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,663 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,663 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,665 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:52:32,723 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:52:32,737 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:52:32,739 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:52:32,750 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_92-evilcollapse_racing.i[47038,47051] [2023-08-24 06:52:32,753 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,753 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,754 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,754 WARN L1561 CHandler]: Possible shadowing of function new [2023-08-24 06:52:32,774 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:52:32,830 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:52:32,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32 WrapperNode [2023-08-24 06:52:32,830 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:52:32,831 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:52:32,831 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:52:32,831 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:52:32,837 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,857 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,881 INFO L138 Inliner]: procedures = 278, calls = 51, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 229 [2023-08-24 06:52:32,881 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:52:32,882 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:52:32,882 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:52:32,882 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:52:32,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,919 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,926 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,928 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:52:32,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:52:32,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:52:32,934 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:52:32,934 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (1/1) ... [2023-08-24 06:52:32,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:52:32,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:52:32,962 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) [2023-08-24 06:52:32,964 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 [2023-08-24 06:52:32,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:52:32,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 06:52:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:52:32,994 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:52:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:52:32,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:52:32,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:52:32,995 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 06:52:33,121 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:52:33,122 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:52:33,506 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:52:33,515 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:52:33,515 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-24 06:52:33,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:52:33 BoogieIcfgContainer [2023-08-24 06:52:33,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:52:33,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:52:33,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:52:33,522 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:52:33,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:52:32" (1/3) ... [2023-08-24 06:52:33,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626263ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:52:33, skipping insertion in model container [2023-08-24 06:52:33,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:52:32" (2/3) ... [2023-08-24 06:52:33,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626263ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:52:33, skipping insertion in model container [2023-08-24 06:52:33,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:52:33" (3/3) ... [2023-08-24 06:52:33,525 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing.i [2023-08-24 06:52:33,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:52:33,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 06:52:33,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:52:33,615 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:52:33,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 237 transitions, 482 flow [2023-08-24 06:52:33,733 INFO L124 PetriNetUnfolderBase]: 28/255 cut-off events. [2023-08-24 06:52:33,733 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 06:52:33,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 255 events. 28/255 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 414 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 138. Up to 4 conditions per place. [2023-08-24 06:52:33,741 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 237 transitions, 482 flow [2023-08-24 06:52:33,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 232 transitions, 469 flow [2023-08-24 06:52:33,749 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:52:33,757 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 232 transitions, 469 flow [2023-08-24 06:52:33,759 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 232 transitions, 469 flow [2023-08-24 06:52:33,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 232 transitions, 469 flow [2023-08-24 06:52:33,799 INFO L124 PetriNetUnfolderBase]: 27/250 cut-off events. [2023-08-24 06:52:33,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:52:33,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 250 events. 27/250 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 357 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 138. Up to 4 conditions per place. [2023-08-24 06:52:33,803 INFO L119 LiptonReduction]: Number of co-enabled transitions 4176 [2023-08-24 06:52:51,531 WARN L234 SmtUtils]: Spent 6.66s on a formula simplification that was a NOOP. DAG size: 174 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:52:56,899 WARN L234 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:53:03,246 WARN L234 SmtUtils]: Spent 6.34s on a formula simplification that was a NOOP. DAG size: 174 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:53:08,688 WARN L234 SmtUtils]: Spent 5.44s on a formula simplification that was a NOOP. DAG size: 172 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 06:53:08,996 INFO L134 LiptonReduction]: Checked pairs total: 4157 [2023-08-24 06:53:08,997 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-08-24 06:53:09,007 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:53:09,011 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=false, 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;@4ddd754e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:53:09,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:53:09,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:53:09,016 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-08-24 06:53:09,016 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:53:09,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:09,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:53:09,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:09,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 678225158, now seen corresponding path program 1 times [2023-08-24 06:53:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:09,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523954448] [2023-08-24 06:53:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:09,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:53:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:09,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523954448] [2023-08-24 06:53:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523954448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:53:09,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:53:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:53:09,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919829592] [2023-08-24 06:53:09,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:53:09,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:53:09,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:53:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:53:09,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 474 [2023-08-24 06:53:09,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 36 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-24 06:53:09,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:09,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 474 [2023-08-24 06:53:09,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:09,528 INFO L124 PetriNetUnfolderBase]: 48/112 cut-off events. [2023-08-24 06:53:09,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:53:09,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217 conditions, 112 events. 48/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 277 event pairs, 33 based on Foata normal form. 8/92 useless extension candidates. Maximal degree in co-relation 188. Up to 97 conditions per place. [2023-08-24 06:53:09,530 INFO L140 encePairwiseOnDemand]: 461/474 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-24 06:53:09,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 113 flow [2023-08-24 06:53:09,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:53:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:53:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-08-24 06:53:09,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45358649789029537 [2023-08-24 06:53:09,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-08-24 06:53:09,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-08-24 06:53:09,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:09,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-08-24 06:53:09,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 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) [2023-08-24 06:53:09,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 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) [2023-08-24 06:53:09,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 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) [2023-08-24 06:53:09,562 INFO L175 Difference]: Start difference. First operand has 25 places, 36 transitions, 77 flow. Second operand 3 states and 645 transitions. [2023-08-24 06:53:09,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 113 flow [2023-08-24 06:53:09,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:53:09,565 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 69 flow [2023-08-24 06:53:09,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 06:53:09,569 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-24 06:53:09,570 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 69 flow [2023-08-24 06:53:09,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 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) [2023-08-24 06:53:09,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:09,570 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:53:09,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:53:09,571 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:09,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 465019210, now seen corresponding path program 1 times [2023-08-24 06:53:09,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:09,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903671045] [2023-08-24 06:53:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:09,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:53:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:09,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:09,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903671045] [2023-08-24 06:53:09,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903671045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:53:09,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:53:09,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 06:53:09,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891595484] [2023-08-24 06:53:09,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:53:09,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:53:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:53:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:53:09,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-24 06:53:09,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 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) [2023-08-24 06:53:09,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:09,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-24 06:53:09,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:09,803 INFO L124 PetriNetUnfolderBase]: 48/114 cut-off events. [2023-08-24 06:53:09,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:53:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 114 events. 48/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 278 event pairs, 33 based on Foata normal form. 2/91 useless extension candidates. Maximal degree in co-relation 210. Up to 100 conditions per place. [2023-08-24 06:53:09,804 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 22 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-24 06:53:09,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 119 flow [2023-08-24 06:53:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:53:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:53:09,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-24 06:53:09,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45147679324894513 [2023-08-24 06:53:09,807 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-24 06:53:09,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-24 06:53:09,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:09,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-24 06:53:09,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 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) [2023-08-24 06:53:09,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 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) [2023-08-24 06:53:09,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 474.0) internal successors, (1896), 4 states have internal predecessors, (1896), 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) [2023-08-24 06:53:09,817 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 69 flow. Second operand 3 states and 642 transitions. [2023-08-24 06:53:09,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 119 flow [2023-08-24 06:53:09,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 06:53:09,819 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 81 flow [2023-08-24 06:53:09,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-24 06:53:09,819 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-24 06:53:09,820 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 81 flow [2023-08-24 06:53:09,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 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) [2023-08-24 06:53:09,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:09,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:53:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 06:53:09,820 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:09,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1827413293, now seen corresponding path program 1 times [2023-08-24 06:53:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306300538] [2023-08-24 06:53:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:09,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:09,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145838557] [2023-08-24 06:53:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:09,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:09,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:09,872 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) [2023-08-24 06:53:09,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 06:53:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:53:10,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:53:10,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:53:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:10,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:53:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306300538] [2023-08-24 06:53:10,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:53:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145838557] [2023-08-24 06:53:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145838557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:53:10,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:53:10,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2023-08-24 06:53:10,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785889139] [2023-08-24 06:53:10,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:53:10,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:53:10,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:10,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:53:10,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:53:10,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-24 06:53:10,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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) [2023-08-24 06:53:10,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:10,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-24 06:53:10,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:10,561 INFO L124 PetriNetUnfolderBase]: 48/120 cut-off events. [2023-08-24 06:53:10,562 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 06:53:10,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 120 events. 48/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 290 event pairs, 33 based on Foata normal form. 6/101 useless extension candidates. Maximal degree in co-relation 217. Up to 100 conditions per place. [2023-08-24 06:53:10,564 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 22 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-24 06:53:10,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 147 flow [2023-08-24 06:53:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:53:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:53:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1265 transitions. [2023-08-24 06:53:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44479606188466947 [2023-08-24 06:53:10,568 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1265 transitions. [2023-08-24 06:53:10,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1265 transitions. [2023-08-24 06:53:10,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:10,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1265 transitions. [2023-08-24 06:53:10,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.83333333333334) internal successors, (1265), 6 states have internal predecessors, (1265), 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) [2023-08-24 06:53:10,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 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) [2023-08-24 06:53:10,580 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 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) [2023-08-24 06:53:10,581 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 81 flow. Second operand 6 states and 1265 transitions. [2023-08-24 06:53:10,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 147 flow [2023-08-24 06:53:10,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 143 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 06:53:10,584 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2023-08-24 06:53:10,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 06:53:10,585 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-08-24 06:53:10,585 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2023-08-24 06:53:10,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 207.83333333333334) internal successors, (1247), 6 states have internal predecessors, (1247), 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) [2023-08-24 06:53:10,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:10,586 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:53:10,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 06:53:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:10,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:10,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:10,793 INFO L85 PathProgramCache]: Analyzing trace with hash 48824842, now seen corresponding path program 2 times [2023-08-24 06:53:10,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:10,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388736798] [2023-08-24 06:53:10,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:10,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:10,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470535060] [2023-08-24 06:53:10,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:53:10,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:10,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:10,881 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) [2023-08-24 06:53:10,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 06:53:11,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:53:11,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:53:11,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:53:11,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:53:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:11,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:53:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:53:11,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388736798] [2023-08-24 06:53:11,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:53:11,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470535060] [2023-08-24 06:53:11,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470535060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:53:11,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:53:11,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-08-24 06:53:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334131434] [2023-08-24 06:53:11,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:53:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 06:53:11,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 06:53:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-24 06:53:11,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-24 06:53:11,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 12 states, 12 states have (on average 207.41666666666666) internal successors, (2489), 12 states have internal predecessors, (2489), 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) [2023-08-24 06:53:11,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:11,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-24 06:53:11,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:11,864 INFO L124 PetriNetUnfolderBase]: 48/132 cut-off events. [2023-08-24 06:53:11,864 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-24 06:53:11,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 132 events. 48/132 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 338 event pairs, 33 based on Foata normal form. 12/119 useless extension candidates. Maximal degree in co-relation 213. Up to 100 conditions per place. [2023-08-24 06:53:11,865 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 22 selfloop transitions, 11 changer transitions 0/37 dead transitions. [2023-08-24 06:53:11,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 37 transitions, 221 flow [2023-08-24 06:53:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:53:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:53:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2510 transitions. [2023-08-24 06:53:11,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44127988748241914 [2023-08-24 06:53:11,873 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2510 transitions. [2023-08-24 06:53:11,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2510 transitions. [2023-08-24 06:53:11,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:11,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2510 transitions. [2023-08-24 06:53:11,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.16666666666666) internal successors, (2510), 12 states have internal predecessors, (2510), 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) [2023-08-24 06:53:11,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 474.0) internal successors, (6162), 13 states have internal predecessors, (6162), 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) [2023-08-24 06:53:11,890 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 474.0) internal successors, (6162), 13 states have internal predecessors, (6162), 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) [2023-08-24 06:53:11,890 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 12 states and 2510 transitions. [2023-08-24 06:53:11,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 37 transitions, 221 flow [2023-08-24 06:53:11,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 37 transitions, 207 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:53:11,892 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 201 flow [2023-08-24 06:53:11,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=201, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-24 06:53:11,893 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2023-08-24 06:53:11,893 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 201 flow [2023-08-24 06:53:11,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 207.41666666666666) internal successors, (2489), 12 states have internal predecessors, (2489), 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) [2023-08-24 06:53:11,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:11,895 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:53:11,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 06:53:12,102 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 [2023-08-24 06:53:12,102 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:12,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:12,103 INFO L85 PathProgramCache]: Analyzing trace with hash 603529002, now seen corresponding path program 3 times [2023-08-24 06:53:12,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:12,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952072529] [2023-08-24 06:53:12,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:12,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:12,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:12,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308928098] [2023-08-24 06:53:12,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 06:53:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:12,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:12,232 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:53:12,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 06:53:12,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 06:53:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:53:12,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:53:12,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:53:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-24 06:53:12,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:53:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-24 06:53:12,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952072529] [2023-08-24 06:53:12,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:53:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308928098] [2023-08-24 06:53:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308928098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:53:12,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:53:12,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-08-24 06:53:12,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619366558] [2023-08-24 06:53:12,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:53:12,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 06:53:12,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:12,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 06:53:12,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 06:53:12,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 474 [2023-08-24 06:53:12,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 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) [2023-08-24 06:53:12,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:12,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 474 [2023-08-24 06:53:12,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:12,986 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2023-08-24 06:53:12,986 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2023-08-24 06:53:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 159 events. 50/159 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 276 event pairs, 33 based on Foata normal form. 3/137 useless extension candidates. Maximal degree in co-relation 310. Up to 94 conditions per place. [2023-08-24 06:53:12,988 INFO L140 encePairwiseOnDemand]: 470/474 looper letters, 66 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2023-08-24 06:53:12,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 76 transitions, 694 flow [2023-08-24 06:53:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:53:12,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:53:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1253 transitions. [2023-08-24 06:53:12,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44057665260196904 [2023-08-24 06:53:12,992 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1253 transitions. [2023-08-24 06:53:12,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1253 transitions. [2023-08-24 06:53:12,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:12,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1253 transitions. [2023-08-24 06:53:12,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 208.83333333333334) internal successors, (1253), 6 states have internal predecessors, (1253), 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) [2023-08-24 06:53:12,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 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) [2023-08-24 06:53:12,999 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 474.0) internal successors, (3318), 7 states have internal predecessors, (3318), 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) [2023-08-24 06:53:12,999 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 201 flow. Second operand 6 states and 1253 transitions. [2023-08-24 06:53:12,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 76 transitions, 694 flow [2023-08-24 06:53:13,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 76 transitions, 500 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-24 06:53:13,004 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 236 flow [2023-08-24 06:53:13,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-24 06:53:13,037 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2023-08-24 06:53:13,037 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 236 flow [2023-08-24 06:53:13,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 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) [2023-08-24 06:53:13,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:13,038 INFO L208 CegarLoopForPetriNet]: trace histogram [40, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:53:13,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 06:53:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:13,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:13,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash -163231338, now seen corresponding path program 4 times [2023-08-24 06:53:13,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:13,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798885531] [2023-08-24 06:53:13,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:13,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:13,641 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107603352] [2023-08-24 06:53:13,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 06:53:13,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:13,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:53:13,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 06:53:15,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 06:53:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:53:15,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 9543 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 06:53:15,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:53:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-24 06:53:16,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:53:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 367 proven. 55 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2023-08-24 06:53:16,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:53:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798885531] [2023-08-24 06:53:16,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-24 06:53:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107603352] [2023-08-24 06:53:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107603352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:53:16,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-24 06:53:16,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-08-24 06:53:16,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601799385] [2023-08-24 06:53:16,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-24 06:53:16,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 06:53:16,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:53:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 06:53:16,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2023-08-24 06:53:16,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 474 [2023-08-24 06:53:16,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 236 flow. Second operand has 24 states, 24 states have (on average 207.33333333333334) internal successors, (4976), 24 states have internal predecessors, (4976), 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) [2023-08-24 06:53:16,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:53:16,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 474 [2023-08-24 06:53:16,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:53:17,643 INFO L124 PetriNetUnfolderBase]: 50/207 cut-off events. [2023-08-24 06:53:17,643 INFO L125 PetriNetUnfolderBase]: For 3489/3489 co-relation queries the response was YES. [2023-08-24 06:53:17,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 207 events. 50/207 cut-off events. For 3489/3489 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 276 event pairs, 33 based on Foata normal form. 48/230 useless extension candidates. Maximal degree in co-relation 423. Up to 106 conditions per place. [2023-08-24 06:53:17,644 INFO L140 encePairwiseOnDemand]: 471/474 looper letters, 24 selfloop transitions, 24 changer transitions 0/52 dead transitions. [2023-08-24 06:53:17,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 52 transitions, 404 flow [2023-08-24 06:53:17,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 06:53:17,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 06:53:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5000 transitions. [2023-08-24 06:53:17,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43952180028129395 [2023-08-24 06:53:17,662 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5000 transitions. [2023-08-24 06:53:17,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5000 transitions. [2023-08-24 06:53:17,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:53:17,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5000 transitions. [2023-08-24 06:53:17,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 208.33333333333334) internal successors, (5000), 24 states have internal predecessors, (5000), 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) [2023-08-24 06:53:17,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 474.0) internal successors, (11850), 25 states have internal predecessors, (11850), 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) [2023-08-24 06:53:17,694 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 474.0) internal successors, (11850), 25 states have internal predecessors, (11850), 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) [2023-08-24 06:53:17,694 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 236 flow. Second operand 24 states and 5000 transitions. [2023-08-24 06:53:17,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 52 transitions, 404 flow [2023-08-24 06:53:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 52 transitions, 396 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 06:53:17,699 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 470 flow [2023-08-24 06:53:17,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=474, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=470, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-24 06:53:17,701 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-08-24 06:53:17,701 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 470 flow [2023-08-24 06:53:17,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 207.33333333333334) internal successors, (4976), 24 states have internal predecessors, (4976), 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) [2023-08-24 06:53:17,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:53:17,715 INFO L208 CegarLoopForPetriNet]: trace histogram [88, 4, 4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:53:17,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 06:53:17,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:17,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:53:17,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:53:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1078522218, now seen corresponding path program 5 times [2023-08-24 06:53:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:53:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441610441] [2023-08-24 06:53:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:53:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:53:18,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-24 06:53:18,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980222336] [2023-08-24 06:53:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 06:53:18,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:53:18,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:53:18,849 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 06:53:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process Received shutdown request... [2023-08-24 07:07:11,252 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 07:07:11,253 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 07:07:12,331 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 [2023-08-24 07:07:12,453 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forcibly destroying the process [2023-08-24 07:07:12,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 137 [2023-08-24 07:07:12,492 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-08-24 07:07:12,493 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 07:07:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 07:07:12,494 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 104 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-08-24 07:07:12,495 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-08-24 07:07:12,496 INFO L307 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (1/2) [2023-08-24 07:07:12,497 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 07:07:12,497 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 07:07:12,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 07:07:12 BasicIcfg [2023-08-24 07:07:12,502 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 07:07:12,503 INFO L158 Benchmark]: Toolchain (without parser) took 880325.66ms. Allocated memory was 346.0MB in the beginning and 501.2MB in the end (delta: 155.2MB). Free memory was 320.4MB in the beginning and 233.9MB in the end (delta: 86.5MB). Peak memory consumption was 242.9MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,503 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 346.0MB. Free memory is still 322.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 07:07:12,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 652.52ms. Allocated memory is still 346.0MB. Free memory was 320.4MB in the beginning and 289.0MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,507 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.25ms. Allocated memory is still 346.0MB. Free memory was 289.0MB in the beginning and 286.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,507 INFO L158 Benchmark]: Boogie Preprocessor took 51.14ms. Allocated memory is still 346.0MB. Free memory was 286.0MB in the beginning and 283.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,508 INFO L158 Benchmark]: RCFGBuilder took 584.38ms. Allocated memory is still 346.0MB. Free memory was 283.7MB in the beginning and 311.2MB in the end (delta: -27.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,508 INFO L158 Benchmark]: TraceAbstraction took 878982.72ms. Allocated memory was 346.0MB in the beginning and 501.2MB in the end (delta: 155.2MB). Free memory was 311.0MB in the beginning and 233.9MB in the end (delta: 77.1MB). Peak memory consumption was 232.4MB. Max. memory is 16.0GB. [2023-08-24 07:07:12,509 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 346.0MB. Free memory is still 322.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 652.52ms. Allocated memory is still 346.0MB. Free memory was 320.4MB in the beginning and 289.0MB in the end (delta: 31.4MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.25ms. Allocated memory is still 346.0MB. Free memory was 289.0MB in the beginning and 286.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 51.14ms. Allocated memory is still 346.0MB. Free memory was 286.0MB in the beginning and 283.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 584.38ms. Allocated memory is still 346.0MB. Free memory was 283.7MB in the beginning and 311.2MB in the end (delta: -27.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 878982.72ms. Allocated memory was 346.0MB in the beginning and 501.2MB in the end (delta: 155.2MB). Free memory was 311.0MB in the beginning and 233.9MB in the end (delta: 77.1MB). Peak memory consumption was 232.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 35.2s, 210 PlacesBefore, 25 PlacesAfterwards, 232 TransitionsBefore, 36 TransitionsAfterwards, 4176 CoEnabledTransitionPairs, 7 FixpointIterations, 110 TrivialSequentialCompositions, 82 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 19 ConcurrentYvCompositions, 11 ChoiceCompositions, 237 TotalNumberOfCompositions, 4157 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3375, independent: 3302, independent conditional: 0, independent unconditional: 3302, dependent: 73, dependent conditional: 0, dependent unconditional: 73, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2118, independent: 2099, independent conditional: 0, independent unconditional: 2099, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3375, independent: 1203, independent conditional: 0, independent unconditional: 1203, dependent: 54, dependent conditional: 0, dependent unconditional: 54, unknown: 2118, unknown conditional: 0, unknown unconditional: 2118] , Statistics on independence cache: Total cache size (in pairs): 43, Positive cache size: 36, Positive conditional cache size: 0, Positive unconditional cache size: 36, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1072]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 104 with TraceHistMax 88,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 283 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 878.9s, OverallIterations: 7, TraceHistogramMax: 88, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 35.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 496 IncrementalHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 496 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=470occurred in iteration=6, InterpolantAutomatonStates: 54, 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: 0.7s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 113 NumberOfCodeBlocks, 103 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 328 SizeOfPredicates, 0 NumberOfNonLiveVariables, 11265 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 1937/2071 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 could not prove your program: Timeout Completed graceful shutdown