/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:08:49,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:08:49,799 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:08:49,802 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:08:49,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:08:49,802 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:08:49,803 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:08:49,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:08:49,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:08:49,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:08:49,817 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:08:49,817 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:08:49,817 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:08:49,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:08:49,818 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:08:49,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:08:49,818 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:08:49,819 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:08:49,819 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:08:49,819 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:08:49,819 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:08:49,820 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:08:49,820 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:08:49,820 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:08:49,820 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:08:49,821 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:08:49,821 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:08:49,821 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:08:49,821 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:08:49,821 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:08:49,822 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:08:49,822 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:08:49,822 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:08:49,822 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:08:49,822 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:08:49,823 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:08:49,823 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:08:49,823 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:08:49,823 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:08:49,824 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:08:49,824 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:08:49,824 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:08:50,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:08:50,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:08:50,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:08:50,035 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:08:50,035 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:08:50,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i [2023-08-03 22:08:51,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:08:51,252 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:08:51,252 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i [2023-08-03 22:08:51,266 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58e82ec4/279e19d1ec9241f3bdc8df0abee70a1b/FLAG2acb90732 [2023-08-03 22:08:51,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c58e82ec4/279e19d1ec9241f3bdc8df0abee70a1b [2023-08-03 22:08:51,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:08:51,280 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:08:51,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:08:51,281 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:08:51,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:08:51,283 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4604a329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51, skipping insertion in model container [2023-08-03 22:08:51,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,321 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:08:51,425 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i[1094,1107] [2023-08-03 22:08:51,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:08:51,616 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:08:51,624 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i[1094,1107] [2023-08-03 22:08:51,643 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:08:51,645 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:08:51,649 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [730] [2023-08-03 22:08:51,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:08:51,725 WARN L667 CHandler]: The function sleep is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:08:51,730 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:08:51,731 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51 WrapperNode [2023-08-03 22:08:51,731 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:08:51,732 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:08:51,732 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:08:51,732 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:08:51,737 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,754 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,769 INFO L138 Inliner]: procedures = 354, calls = 38, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2023-08-03 22:08:51,770 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:08:51,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:08:51,770 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:08:51,770 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:08:51,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,787 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:08:51,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:08:51,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:08:51,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:08:51,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (1/1) ... [2023-08-03 22:08:51,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:08:51,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:51,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:08:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:08:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2023-08-03 22:08:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2023-08-03 22:08:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2023-08-03 22:08:51,900 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2023-08-03 22:08:51,900 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2023-08-03 22:08:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:08:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:08:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:08:51,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:08:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:08:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:08:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:08:51,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:08:51,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:08:51,904 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:08:52,144 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:08:52,145 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:08:52,272 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:08:52,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:08:52,277 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 22:08:52,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:08:52 BoogieIcfgContainer [2023-08-03 22:08:52,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:08:52,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:08:52,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:08:52,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:08:52,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:08:51" (1/3) ... [2023-08-03 22:08:52,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed9775b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:08:52, skipping insertion in model container [2023-08-03 22:08:52,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:08:51" (2/3) ... [2023-08-03 22:08:52,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed9775b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:08:52, skipping insertion in model container [2023-08-03 22:08:52,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:08:52" (3/3) ... [2023-08-03 22:08:52,285 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_67-pthread_cond_wait_true_bound2.i [2023-08-03 22:08:52,290 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:08:52,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:08:52,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:08:52,296 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:08:52,331 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 22:08:52,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 258 flow [2023-08-03 22:08:52,398 INFO L124 PetriNetUnfolderBase]: 23/230 cut-off events. [2023-08-03 22:08:52,398 INFO L125 PetriNetUnfolderBase]: For 8/10 co-relation queries the response was YES. [2023-08-03 22:08:52,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 230 events. 23/230 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 719 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-03 22:08:52,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 118 transitions, 258 flow [2023-08-03 22:08:52,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 248 flow [2023-08-03 22:08:52,410 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:08:52,416 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 116 transitions, 248 flow [2023-08-03 22:08:52,417 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 116 transitions, 248 flow [2023-08-03 22:08:52,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2023-08-03 22:08:52,440 INFO L124 PetriNetUnfolderBase]: 19/218 cut-off events. [2023-08-03 22:08:52,440 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 22:08:52,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 19/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 668 event pairs, 0 based on Foata normal form. 0/188 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2023-08-03 22:08:52,443 INFO L119 LiptonReduction]: Number of co-enabled transitions 2886 [2023-08-03 22:08:54,926 INFO L134 LiptonReduction]: Checked pairs total: 6582 [2023-08-03 22:08:54,926 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 22:08:54,935 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:08:54,939 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17867e1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:54,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:08:54,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:54,943 INFO L124 PetriNetUnfolderBase]: 0/24 cut-off events. [2023-08-03 22:08:54,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:08:54,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:54,943 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:08:54,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:08:54,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:54,947 INFO L85 PathProgramCache]: Analyzing trace with hash -178056489, now seen corresponding path program 1 times [2023-08-03 22:08:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:54,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922231779] [2023-08-03 22:08:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:08:55,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:08:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:08:55,109 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:08:55,110 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:08:55,110 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:08:55,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:08:55,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:08:55,112 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:08:55,114 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 22:08:55,115 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:08:55,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:08:55,138 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 22:08:55,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,238 INFO L124 PetriNetUnfolderBase]: 103/697 cut-off events. [2023-08-03 22:08:55,238 INFO L125 PetriNetUnfolderBase]: For 72/76 co-relation queries the response was YES. [2023-08-03 22:08:55,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 697 events. 103/697 cut-off events. For 72/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3502 event pairs, 1 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-03 22:08:55,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,245 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:08:55,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:08:55,296 INFO L124 PetriNetUnfolderBase]: 103/697 cut-off events. [2023-08-03 22:08:55,296 INFO L125 PetriNetUnfolderBase]: For 72/76 co-relation queries the response was YES. [2023-08-03 22:08:55,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 697 events. 103/697 cut-off events. For 72/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3502 event pairs, 1 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-03 22:08:55,311 INFO L119 LiptonReduction]: Number of co-enabled transitions 8076 [2023-08-03 22:08:57,960 INFO L134 LiptonReduction]: Checked pairs total: 22243 [2023-08-03 22:08:57,960 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-03 22:08:57,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:08:57,962 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17867e1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:08:57,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 22:08:57,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:08:57,970 INFO L124 PetriNetUnfolderBase]: 2/68 cut-off events. [2023-08-03 22:08:57,970 INFO L125 PetriNetUnfolderBase]: For 9/11 co-relation queries the response was YES. [2023-08-03 22:08:57,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:08:57,970 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:08:57,971 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:08:57,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:08:57,977 INFO L85 PathProgramCache]: Analyzing trace with hash 180198132, now seen corresponding path program 1 times [2023-08-03 22:08:57,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:08:57,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126125938] [2023-08-03 22:08:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:57,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:08:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:58,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:08:58,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126125938] [2023-08-03 22:08:58,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126125938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:08:58,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142041997] [2023-08-03 22:08:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:08:58,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:08:58,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:08:58,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:08:58,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:08:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:08:58,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:08:58,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:08:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:08:58,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:08:58,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142041997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:08:58,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:08:58,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:08:58,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374449702] [2023-08-03 22:08:58,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:08:58,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:08:58,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:08:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:08:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:08:58,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 261 [2023-08-03 22:08:58,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:08:58,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:08:58,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 261 [2023-08-03 22:08:58,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:00,283 INFO L124 PetriNetUnfolderBase]: 19045/28911 cut-off events. [2023-08-03 22:09:00,283 INFO L125 PetriNetUnfolderBase]: For 2939/2939 co-relation queries the response was YES. [2023-08-03 22:09:00,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57650 conditions, 28911 events. 19045/28911 cut-off events. For 2939/2939 co-relation queries the response was YES. Maximal size of possible extension queue 1332. Compared 220144 event pairs, 11126 based on Foata normal form. 0/24446 useless extension candidates. Maximal degree in co-relation 12260. Up to 26455 conditions per place. [2023-08-03 22:09:00,357 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 41 selfloop transitions, 5 changer transitions 17/73 dead transitions. [2023-08-03 22:09:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 312 flow [2023-08-03 22:09:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:09:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:09:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2023-08-03 22:09:00,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5302681992337165 [2023-08-03 22:09:00,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2023-08-03 22:09:00,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2023-08-03 22:09:00,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:00,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2023-08-03 22:09:00,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:00,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:00,388 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:00,389 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 154 flow. Second operand 5 states and 692 transitions. [2023-08-03 22:09:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 312 flow [2023-08-03 22:09:00,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:09:00,409 INFO L231 Difference]: Finished difference. Result has 56 places, 38 transitions, 111 flow [2023-08-03 22:09:00,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=56, PETRI_TRANSITIONS=38} [2023-08-03 22:09:00,413 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2023-08-03 22:09:00,413 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 38 transitions, 111 flow [2023-08-03 22:09:00,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:00,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:00,414 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-03 22:09:00,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 22:09:00,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:00,619 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:09:00,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:00,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1889023260, now seen corresponding path program 1 times [2023-08-03 22:09:00,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:00,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951087288] [2023-08-03 22:09:00,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:00,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:09:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:00,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951087288] [2023-08-03 22:09:00,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951087288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:09:00,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:09:00,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:09:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178565291] [2023-08-03 22:09:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:09:00,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:09:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:09:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:09:00,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 261 [2023-08-03 22:09:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 38 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 261 [2023-08-03 22:09:00,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:01,083 INFO L124 PetriNetUnfolderBase]: 4711/7460 cut-off events. [2023-08-03 22:09:01,083 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2023-08-03 22:09:01,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15019 conditions, 7460 events. 4711/7460 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50948 event pairs, 3031 based on Foata normal form. 1/6815 useless extension candidates. Maximal degree in co-relation 4029. Up to 6672 conditions per place. [2023-08-03 22:09:01,126 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 32 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-03 22:09:01,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 190 flow [2023-08-03 22:09:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:09:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:09:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-03 22:09:01,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5300127713920817 [2023-08-03 22:09:01,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-03 22:09:01,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-03 22:09:01,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:01,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-03 22:09:01,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,131 INFO L175 Difference]: Start difference. First operand has 56 places, 38 transitions, 111 flow. Second operand 3 states and 415 transitions. [2023-08-03 22:09:01,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 190 flow [2023-08-03 22:09:01,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 187 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 22:09:01,133 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 107 flow [2023-08-03 22:09:01,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-03 22:09:01,134 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-03 22:09:01,134 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 107 flow [2023-08-03 22:09:01,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:01,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:01,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:09:01,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:09:01,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash -146229057, now seen corresponding path program 1 times [2023-08-03 22:09:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:01,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890777922] [2023-08-03 22:09:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:01,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:09:01,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890777922] [2023-08-03 22:09:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890777922] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:09:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116070808] [2023-08-03 22:09:01,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:01,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:01,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:09:01,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:09:01,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:09:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:01,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:09:01,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:09:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:09:01,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:09:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 22:09:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116070808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:09:01,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:09:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:09:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055434476] [2023-08-03 22:09:01,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:09:01,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:09:01,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:09:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:09:01,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 261 [2023-08-03 22:09:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:01,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 261 [2023-08-03 22:09:01,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:01,840 INFO L124 PetriNetUnfolderBase]: 4245/6769 cut-off events. [2023-08-03 22:09:01,840 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2023-08-03 22:09:01,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13436 conditions, 6769 events. 4245/6769 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46293 event pairs, 1456 based on Foata normal form. 7/6244 useless extension candidates. Maximal degree in co-relation 9415. Up to 5836 conditions per place. [2023-08-03 22:09:01,878 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 41 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-03 22:09:01,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 228 flow [2023-08-03 22:09:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:09:01,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:09:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-03 22:09:01,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258620689655172 [2023-08-03 22:09:01,879 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-03 22:09:01,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-03 22:09:01,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:01,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-03 22:09:01,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,882 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,883 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 107 flow. Second operand 4 states and 549 transitions. [2023-08-03 22:09:01,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 228 flow [2023-08-03 22:09:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:09:01,884 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 104 flow [2023-08-03 22:09:01,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-03 22:09:01,886 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -5 predicate places. [2023-08-03 22:09:01,887 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 104 flow [2023-08-03 22:09:01,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:01,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:01,890 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 22:09:02,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 22:09:02,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:09:02,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1758923449, now seen corresponding path program 1 times [2023-08-03 22:09:02,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:02,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926990213] [2023-08-03 22:09:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:02,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:09:02,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926990213] [2023-08-03 22:09:02,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926990213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:09:02,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841564526] [2023-08-03 22:09:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:02,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:02,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:09:02,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:09:02,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:09:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:02,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:09:02,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:09:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:09:02,299 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:09:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841564526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:09:02,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:09:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 22:09:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590162014] [2023-08-03 22:09:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:09:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:09:02,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:02,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:09:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:09:02,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 261 [2023-08-03 22:09:02,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:02,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:02,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 261 [2023-08-03 22:09:02,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:02,635 INFO L124 PetriNetUnfolderBase]: 3102/4805 cut-off events. [2023-08-03 22:09:02,635 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2023-08-03 22:09:02,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9867 conditions, 4805 events. 3102/4805 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29534 event pairs, 119 based on Foata normal form. 378/4765 useless extension candidates. Maximal degree in co-relation 3949. Up to 2115 conditions per place. [2023-08-03 22:09:02,645 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 0 selfloop transitions, 0 changer transitions 76/76 dead transitions. [2023-08-03 22:09:02,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 316 flow [2023-08-03 22:09:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:09:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:09:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-08-03 22:09:02,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340996168582376 [2023-08-03 22:09:02,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-08-03 22:09:02,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-08-03 22:09:02,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:02,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-08-03 22:09:02,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:02,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:02,653 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:02,653 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 104 flow. Second operand 5 states and 697 transitions. [2023-08-03 22:09:02,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 316 flow [2023-08-03 22:09:02,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 22:09:02,660 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-03 22:09:02,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-03 22:09:02,661 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-03 22:09:02,662 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-03 22:09:02,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:02,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 22:09:02,662 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 22:09:02,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 22:09:02,867 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 [2023-08-03 22:09:02,867 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 22:09:02,868 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 22:09:02,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,920 INFO L124 PetriNetUnfolderBase]: 103/697 cut-off events. [2023-08-03 22:09:02,920 INFO L125 PetriNetUnfolderBase]: For 72/76 co-relation queries the response was YES. [2023-08-03 22:09:02,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 697 events. 103/697 cut-off events. For 72/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3502 event pairs, 1 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-03 22:09:02,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:09:02,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 151 transitions, 350 flow [2023-08-03 22:09:02,972 INFO L124 PetriNetUnfolderBase]: 103/697 cut-off events. [2023-08-03 22:09:02,972 INFO L125 PetriNetUnfolderBase]: For 72/76 co-relation queries the response was YES. [2023-08-03 22:09:02,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 697 events. 103/697 cut-off events. For 72/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3502 event pairs, 1 based on Foata normal form. 0/605 useless extension candidates. Maximal degree in co-relation 423. Up to 32 conditions per place. [2023-08-03 22:09:02,985 INFO L119 LiptonReduction]: Number of co-enabled transitions 8076 [2023-08-03 22:09:05,555 INFO L134 LiptonReduction]: Checked pairs total: 23210 [2023-08-03 22:09:05,555 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-03 22:09:05,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:09:05,564 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17867e1d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:09:05,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:09:05,568 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:09:05,568 INFO L124 PetriNetUnfolderBase]: 1/40 cut-off events. [2023-08-03 22:09:05,568 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 22:09:05,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:05,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:05,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:09:05,568 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1427861102, now seen corresponding path program 1 times [2023-08-03 22:09:05,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:05,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947284253] [2023-08-03 22:09:05,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:05,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:09:05,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:05,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947284253] [2023-08-03 22:09:05,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947284253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:09:05,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:09:05,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:09:05,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265380909] [2023-08-03 22:09:05,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:09:05,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:09:05,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:09:05,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:09:05,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 263 [2023-08-03 22:09:05,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:05,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:05,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 263 [2023-08-03 22:09:05,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:09,029 INFO L124 PetriNetUnfolderBase]: 48743/74025 cut-off events. [2023-08-03 22:09:09,029 INFO L125 PetriNetUnfolderBase]: For 6615/6615 co-relation queries the response was YES. [2023-08-03 22:09:09,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144672 conditions, 74025 events. 48743/74025 cut-off events. For 6615/6615 co-relation queries the response was YES. Maximal size of possible extension queue 2750. Compared 588446 event pairs, 26255 based on Foata normal form. 3111/67880 useless extension candidates. Maximal degree in co-relation 81126. Up to 47690 conditions per place. [2023-08-03 22:09:09,281 INFO L140 encePairwiseOnDemand]: 254/263 looper letters, 76 selfloop transitions, 6 changer transitions 0/92 dead transitions. [2023-08-03 22:09:09,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 433 flow [2023-08-03 22:09:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:09:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:09:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-03 22:09:09,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804816223067174 [2023-08-03 22:09:09,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-03 22:09:09,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-03 22:09:09,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:09,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-03 22:09:09,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:09,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:09,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:09,286 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 158 flow. Second operand 3 states and 458 transitions. [2023-08-03 22:09:09,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 433 flow [2023-08-03 22:09:09,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 92 transitions, 433 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:09:09,305 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 206 flow [2023-08-03 22:09:09,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-08-03 22:09:09,307 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-03 22:09:09,308 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 206 flow [2023-08-03 22:09:09,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:09,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:09,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:09,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:09:09,308 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:09:09,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -438770482, now seen corresponding path program 1 times [2023-08-03 22:09:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:09,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323558234] [2023-08-03 22:09:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:09,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:09:09,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:09,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323558234] [2023-08-03 22:09:09,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323558234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:09:09,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207324060] [2023-08-03 22:09:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:09,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:09,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:09:09,360 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:09:09,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 22:09:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:09,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:09:09,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:09:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:09:09,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:09:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:09:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207324060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:09:09,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:09:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:09:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541677447] [2023-08-03 22:09:09,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:09:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:09:09,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:09:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:09:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 263 [2023-08-03 22:09:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 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) [2023-08-03 22:09:09,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:09,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 263 [2023-08-03 22:09:09,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:12,659 INFO L124 PetriNetUnfolderBase]: 39088/58491 cut-off events. [2023-08-03 22:09:12,660 INFO L125 PetriNetUnfolderBase]: For 25284/26832 co-relation queries the response was YES. [2023-08-03 22:09:12,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134706 conditions, 58491 events. 39088/58491 cut-off events. For 25284/26832 co-relation queries the response was YES. Maximal size of possible extension queue 2688. Compared 462977 event pairs, 22966 based on Foata normal form. 522/52219 useless extension candidates. Maximal degree in co-relation 38526. Up to 51655 conditions per place. [2023-08-03 22:09:12,874 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 59 selfloop transitions, 4 changer transitions 2/81 dead transitions. [2023-08-03 22:09:12,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 410 flow [2023-08-03 22:09:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:09:12,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:09:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 565 transitions. [2023-08-03 22:09:12,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370722433460076 [2023-08-03 22:09:12,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 565 transitions. [2023-08-03 22:09:12,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 565 transitions. [2023-08-03 22:09:12,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:12,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 565 transitions. [2023-08-03 22:09:12,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.25) internal successors, (565), 4 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:12,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:12,879 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:12,879 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 206 flow. Second operand 4 states and 565 transitions. [2023-08-03 22:09:12,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 410 flow [2023-08-03 22:09:12,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 81 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:09:12,907 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 220 flow [2023-08-03 22:09:12,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-03 22:09:12,908 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-03 22:09:12,908 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 220 flow [2023-08-03 22:09:12,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 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) [2023-08-03 22:09:12,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:12,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:12,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:09:13,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:13,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:09:13,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash 73276067, now seen corresponding path program 1 times [2023-08-03 22:09:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:13,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837150699] [2023-08-03 22:09:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:09:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837150699] [2023-08-03 22:09:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837150699] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:09:13,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:09:13,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:09:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790628067] [2023-08-03 22:09:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:09:13,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:09:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:09:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:09:13,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 263 [2023-08-03 22:09:13,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:13,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:13,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 263 [2023-08-03 22:09:13,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:09:14,161 INFO L124 PetriNetUnfolderBase]: 9227/17663 cut-off events. [2023-08-03 22:09:14,162 INFO L125 PetriNetUnfolderBase]: For 5152/5152 co-relation queries the response was YES. [2023-08-03 22:09:14,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39481 conditions, 17663 events. 9227/17663 cut-off events. For 5152/5152 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 153114 event pairs, 1878 based on Foata normal form. 6359/21610 useless extension candidates. Maximal degree in co-relation 23914. Up to 12084 conditions per place. [2023-08-03 22:09:14,234 INFO L140 encePairwiseOnDemand]: 251/263 looper letters, 62 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2023-08-03 22:09:14,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 473 flow [2023-08-03 22:09:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:09:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:09:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 427 transitions. [2023-08-03 22:09:14,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541191381495564 [2023-08-03 22:09:14,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 427 transitions. [2023-08-03 22:09:14,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 427 transitions. [2023-08-03 22:09:14,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:09:14,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 427 transitions. [2023-08-03 22:09:14,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:14,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:14,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:14,237 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 220 flow. Second operand 3 states and 427 transitions. [2023-08-03 22:09:14,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 473 flow [2023-08-03 22:09:14,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 473 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:09:14,241 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 244 flow [2023-08-03 22:09:14,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-08-03 22:09:14,241 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-03 22:09:14,241 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 244 flow [2023-08-03 22:09:14,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:09:14,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:14,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:14,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 22:09:14,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION, f1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:09:14,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1520601719, now seen corresponding path program 1 times [2023-08-03 22:09:14,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:14,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340822753] [2023-08-03 22:09:14,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:09:14,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:09:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:09:14,275 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:09:14,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:09:14,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 22:09:14,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 22:09:14,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 22:09:14,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 22:09:14,275 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 22:09:14,276 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-03 22:09:14,278 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:09:14,278 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:09:14,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:09:14 BasicIcfg [2023-08-03 22:09:14,305 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:09:14,305 INFO L158 Benchmark]: Toolchain (without parser) took 23025.79ms. Allocated memory was 639.6MB in the beginning and 6.5GB in the end (delta: 5.9GB). Free memory was 592.8MB in the beginning and 5.1GB in the end (delta: -4.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. [2023-08-03 22:09:14,305 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 408.9MB. Free memory was 356.9MB in the beginning and 356.7MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:09:14,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 450.70ms. Allocated memory is still 639.6MB. Free memory was 592.8MB in the beginning and 554.4MB in the end (delta: 38.4MB). Peak memory consumption was 39.8MB. Max. memory is 16.0GB. [2023-08-03 22:09:14,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.94ms. Allocated memory is still 639.6MB. Free memory was 554.4MB in the beginning and 551.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:09:14,306 INFO L158 Benchmark]: Boogie Preprocessor took 25.40ms. Allocated memory is still 639.6MB. Free memory was 551.4MB in the beginning and 548.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:09:14,306 INFO L158 Benchmark]: RCFGBuilder took 482.76ms. Allocated memory is still 639.6MB. Free memory was 548.8MB in the beginning and 581.6MB in the end (delta: -32.8MB). Peak memory consumption was 10.3MB. Max. memory is 16.0GB. [2023-08-03 22:09:14,306 INFO L158 Benchmark]: TraceAbstraction took 22024.06ms. Allocated memory was 639.6MB in the beginning and 6.5GB in the end (delta: 5.9GB). Free memory was 580.7MB in the beginning and 5.1GB in the end (delta: -4.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. [2023-08-03 22:09:14,307 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 408.9MB. Free memory was 356.9MB in the beginning and 356.7MB in the end (delta: 126.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 450.70ms. Allocated memory is still 639.6MB. Free memory was 592.8MB in the beginning and 554.4MB in the end (delta: 38.4MB). Peak memory consumption was 39.8MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.94ms. Allocated memory is still 639.6MB. Free memory was 554.4MB in the beginning and 551.4MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.40ms. Allocated memory is still 639.6MB. Free memory was 551.4MB in the beginning and 548.8MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 482.76ms. Allocated memory is still 639.6MB. Free memory was 548.8MB in the beginning and 581.6MB in the end (delta: -32.8MB). Peak memory consumption was 10.3MB. Max. memory is 16.0GB. * TraceAbstraction took 22024.06ms. Allocated memory was 639.6MB in the beginning and 6.5GB in the end (delta: 5.9GB). Free memory was 580.7MB in the beginning and 5.1GB in the end (delta: -4.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 730]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [730] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 114 PlacesBefore, 34 PlacesAfterwards, 116 TransitionsBefore, 32 TransitionsAfterwards, 2886 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 4 ChoiceCompositions, 95 TotalNumberOfCompositions, 6582 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4201, independent: 4036, independent conditional: 0, independent unconditional: 4036, dependent: 165, dependent conditional: 0, dependent unconditional: 165, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1556, independent: 1532, independent conditional: 0, independent unconditional: 1532, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4201, independent: 2504, independent conditional: 0, independent unconditional: 2504, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 1556, unknown conditional: 0, unknown unconditional: 1556] , Statistics on independence cache: Total cache size (in pairs): 156, Positive cache size: 144, Positive conditional cache size: 0, Positive unconditional cache size: 144, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.7s, 146 PlacesBefore, 54 PlacesAfterwards, 151 TransitionsBefore, 53 TransitionsAfterwards, 8076 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 110 TotalNumberOfCompositions, 22243 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11518, independent: 11263, independent conditional: 0, independent unconditional: 11263, dependent: 255, dependent conditional: 0, dependent unconditional: 255, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4074, independent: 4027, independent conditional: 0, independent unconditional: 4027, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11518, independent: 7236, independent conditional: 0, independent unconditional: 7236, dependent: 208, dependent conditional: 0, dependent unconditional: 208, unknown: 4074, unknown conditional: 0, unknown unconditional: 4074] , Statistics on independence cache: Total cache size (in pairs): 371, Positive cache size: 351, Positive conditional cache size: 0, Positive unconditional cache size: 351, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 146 PlacesBefore, 55 PlacesAfterwards, 151 TransitionsBefore, 55 TransitionsAfterwards, 8076 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 5 ChoiceCompositions, 112 TotalNumberOfCompositions, 23210 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11872, independent: 11608, independent conditional: 0, independent unconditional: 11608, dependent: 264, dependent conditional: 0, dependent unconditional: 264, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4125, independent: 4073, independent conditional: 0, independent unconditional: 4073, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11872, independent: 7535, independent conditional: 0, independent unconditional: 7535, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 4125, unknown conditional: 0, unknown unconditional: 4125] , Statistics on independence cache: Total cache size (in pairs): 413, Positive cache size: 388, Positive conditional cache size: 0, Positive unconditional cache size: 388, Negative cache size: 25, Negative conditional cache size: 0, Negative unconditional cache size: 25, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1351] 0 int g; [L1352] 0 pthread_mutex_t mut = { { 0, 0, 0, PTHREAD_MUTEX_TIMED_NP, 0, { { 0, 0 } } } }; [L1353] 0 pthread_cond_t cond = { { {0}, {0}, {0, 0}, {0, 0}, 0, 0, {0, 0} } }; [L1373] 0 pthread_t t1[2]; [L1374] 0 pthread_t t2[2]; [L1375] 0 int asdf=0; VAL [\old(argc)=1152, argc=1152, argv={1150:1151}, argv={1150:1151}, asdf=0, cond={4:0}, g=0, mut={3:0}, t1={6:0}, t2={5:0}] [L1375] COND TRUE 0 asdf<2 [L1375] FCALL, FORK 0 pthread_create(&t1[asdf],((void *)0),f1,((void *)0)) VAL [\old(argc)=1152, argc=1152, argv={1150:1151}, argv={1150:1151}, asdf=0, cond={4:0}, g=0, mut={3:0}, pthread_create(&t1[asdf],((void *)0),f1,((void *)0))=-2, t1={6:0}, t2={5:0}] [L1375] 0 asdf++ VAL [\old(argc)=1152, argc=1152, argv={1150:1151}, argv={1150:1151}, asdf=1, cond={4:0}, g=0, mut={3:0}, t1={6:0}, t2={5:0}] [L1375] COND TRUE 0 asdf<2 [L1356] 1 g = 1 VAL [cond={4:0}, g=1, mut={3:0}, ptr={0:0}, ptr={0:0}] [L1375] FCALL, FORK 0 pthread_create(&t1[asdf],((void *)0),f1,((void *)0)) VAL [\old(argc)=1152, argc=1152, argv={1150:1151}, argv={1150:1151}, asdf=1, cond={4:0}, g=1, mut={3:0}, pthread_create(&t1[asdf],((void *)0),f1,((void *)0))=-1, t1={6:0}, t2={5:0}] [L1356] 2 g = 1 VAL [cond={4:0}, g=1, mut={3:0}, ptr={0:0}, ptr={0:0}] [L1358] CALL 1 __VERIFIER_assert(g == 1) [L19] COND FALSE 1 !(!(cond)) [L1358] RET 1 __VERIFIER_assert(g == 1) [L1360] 1 g = 0 VAL [cond={4:0}, g=0, mut={3:0}, ptr={0:0}, ptr={0:0}] [L1362] 1 return ((void *)0); [L1358] CALL 2 __VERIFIER_assert(g == 1) [L19] COND TRUE 2 !(cond) [L19] 2 reach_error() VAL [\old(cond)=1, cond=1, cond={4:0}, g=0, mut={3:0}] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 138 locations, 4 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: 2.8s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 166 locations, 5 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: 7.7s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 215 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 396 IncrementalHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 2 mSDtfsCounter, 396 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=0, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 501 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 66/79 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 166 locations, 5 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: 11.4s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 140 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 98 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 375 IncrementalHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 5 mSDtfsCounter, 375 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=3, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 181 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 2/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 22:09:14,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...