/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:21:09,531 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:21:09,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:21:09,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:21:09,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:21:09,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:21:09,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:21:09,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:21:09,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:21:09,645 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:21:09,646 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:21:09,646 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:21:09,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:21:09,648 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:21:09,648 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:21:09,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:21:09,649 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:21:09,649 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:21:09,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:21:09,649 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:21:09,650 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:21:09,650 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:21:09,650 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:21:09,650 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:21:09,651 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:21:09,652 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:21:09,652 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:21:09,652 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:21:09,653 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:21:09,653 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:21:09,654 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:21:09,654 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:21:09,655 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:21:09,655 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:21:09,655 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:21:09,655 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:21:09,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:21:09,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:21:09,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:21:09,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:21:09,904 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:21:09,904 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:21:09,905 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.opt_bound2.i [2023-08-04 07:21:11,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:21:11,265 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:21:11,265 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.opt_bound2.i [2023-08-04 07:21:11,280 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae8b0f48/61a403acb3a6492087c86874b261f48f/FLAG37e64aa27 [2023-08-04 07:21:11,291 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ae8b0f48/61a403acb3a6492087c86874b261f48f [2023-08-04 07:21:11,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:21:11,294 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:21:11,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:21:11,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:21:11,298 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:21:11,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:11,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24a0a3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11, skipping insertion in model container [2023-08-04 07:21:11,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:11,372 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:21:11,558 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.opt_bound2.i[994,1007] [2023-08-04 07:21:11,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:21:11,815 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:21:11,830 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe027_power.opt_bound2.i[994,1007] [2023-08-04 07:21:11,849 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:21:11,851 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 07:21:11,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:21:11,933 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:21:11,934 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:21:11,939 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:21:11,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11 WrapperNode [2023-08-04 07:21:11,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:21:11,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:21:11,942 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:21:11,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:21:11,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:11,980 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,013 INFO L138 Inliner]: procedures = 177, calls = 88, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 227 [2023-08-04 07:21:12,014 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:21:12,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:21:12,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:21:12,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:21:12,022 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,085 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:21:12,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:21:12,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:21:12,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:21:12,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (1/1) ... [2023-08-04 07:21:12,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:21:12,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:21:12,134 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) [2023-08-04 07:21:12,162 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 [2023-08-04 07:21:12,196 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:21:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:21:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:21:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:21:12,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:21:12,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:21:12,198 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:21:12,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:21:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:21:12,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:21:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:21:12,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:21:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:21:12,199 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:21:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:21:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:21:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:21:12,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:21:12,201 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:21:12,382 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:21:12,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:21:12,805 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:21:13,169 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:21:13,169 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:21:13,171 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:21:13 BoogieIcfgContainer [2023-08-04 07:21:13,172 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:21:13,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:21:13,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:21:13,179 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:21:13,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:21:11" (1/3) ... [2023-08-04 07:21:13,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ec1b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:21:13, skipping insertion in model container [2023-08-04 07:21:13,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:21:11" (2/3) ... [2023-08-04 07:21:13,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ec1b01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:21:13, skipping insertion in model container [2023-08-04 07:21:13,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:21:13" (3/3) ... [2023-08-04 07:21:13,182 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe027_power.opt_bound2.i [2023-08-04 07:21:13,189 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:21:13,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:21:13,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 07:21:13,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:21:13,275 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:21:13,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 174 transitions, 368 flow [2023-08-04 07:21:13,533 INFO L124 PetriNetUnfolderBase]: 62/934 cut-off events. [2023-08-04 07:21:13,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:13,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 934 events. 62/934 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5602 event pairs, 0 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 571. Up to 32 conditions per place. [2023-08-04 07:21:13,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 174 transitions, 368 flow [2023-08-04 07:21:13,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 173 transitions, 364 flow [2023-08-04 07:21:13,554 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:21:13,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 173 transitions, 364 flow [2023-08-04 07:21:13,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 173 transitions, 364 flow [2023-08-04 07:21:13,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 173 transitions, 364 flow [2023-08-04 07:21:13,706 INFO L124 PetriNetUnfolderBase]: 62/933 cut-off events. [2023-08-04 07:21:13,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:13,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 933 events. 62/933 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5586 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 569. Up to 32 conditions per place. [2023-08-04 07:21:13,724 INFO L119 LiptonReduction]: Number of co-enabled transitions 3796 [2023-08-04 07:21:21,386 INFO L134 LiptonReduction]: Checked pairs total: 9922 [2023-08-04 07:21:21,386 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-04 07:21:21,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:21:21,403 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;@546daf37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:21:21,403 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:21:21,407 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:21:21,407 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:21:21,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:21,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:21:21,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:21:21,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:21:21,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:21:21,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1033410440, now seen corresponding path program 1 times [2023-08-04 07:21:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:21:21,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273967826] [2023-08-04 07:21:21,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:21,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:21:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:21:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:21:21,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:21:21,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273967826] [2023-08-04 07:21:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273967826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:21:21,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:21:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:21:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085435955] [2023-08-04 07:21:21,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:21:21,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:21:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:21:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:21:21,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:21:21,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 322 [2023-08-04 07:21:21,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2023-08-04 07:21:21,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:21:21,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 322 [2023-08-04 07:21:21,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:21:25,192 INFO L124 PetriNetUnfolderBase]: 14237/20203 cut-off events. [2023-08-04 07:21:25,193 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-08-04 07:21:25,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40570 conditions, 20203 events. 14237/20203 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 113735 event pairs, 9968 based on Foata normal form. 600/17839 useless extension candidates. Maximal degree in co-relation 40556. Up to 19930 conditions per place. [2023-08-04 07:21:25,321 INFO L140 encePairwiseOnDemand]: 318/322 looper letters, 36 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 07:21:25,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 182 flow [2023-08-04 07:21:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:21:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:21:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2023-08-04 07:21:25,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082815734989649 [2023-08-04 07:21:25,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2023-08-04 07:21:25,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2023-08-04 07:21:25,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:21:25,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2023-08-04 07:21:25,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 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) [2023-08-04 07:21:25,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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) [2023-08-04 07:21:25,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 322.0) internal successors, (1288), 4 states have internal predecessors, (1288), 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) [2023-08-04 07:21:25,359 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 98 flow. Second operand 3 states and 491 transitions. [2023-08-04 07:21:25,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 182 flow [2023-08-04 07:21:25,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 182 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:21:25,365 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 104 flow [2023-08-04 07:21:25,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2023-08-04 07:21:25,370 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-04 07:21:25,371 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 104 flow [2023-08-04 07:21:25,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 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) [2023-08-04 07:21:25,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:21:25,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:21:25,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:21:25,372 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:21:25,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:21:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1760506104, now seen corresponding path program 1 times [2023-08-04 07:21:25,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:21:25,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178643178] [2023-08-04 07:21:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:25,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:21:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:21:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:21:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:21:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178643178] [2023-08-04 07:21:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178643178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:21:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494316456] [2023-08-04 07:21:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:21:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:21:25,518 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) [2023-08-04 07:21:25,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:21:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:21:25,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:21:25,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:21:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:21:25,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:21:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:21:25,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494316456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:21:25,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:21:25,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:21:25,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641019251] [2023-08-04 07:21:25,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:21:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:21:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:21:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:21:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:21:25,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 322 [2023-08-04 07:21:25,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 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) [2023-08-04 07:21:25,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:21:25,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 322 [2023-08-04 07:21:25,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:21:25,782 INFO L124 PetriNetUnfolderBase]: 6/20 cut-off events. [2023-08-04 07:21:25,782 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:21:25,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 20 events. 6/20 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 4/24 useless extension candidates. Maximal degree in co-relation 51. Up to 14 conditions per place. [2023-08-04 07:21:25,782 INFO L140 encePairwiseOnDemand]: 319/322 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-04 07:21:25,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 11 transitions, 53 flow [2023-08-04 07:21:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:21:25,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:21:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 07:21:25,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720496894409938 [2023-08-04 07:21:25,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 07:21:25,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 07:21:25,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:21:25,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 07:21:25,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 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) [2023-08-04 07:21:25,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 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) [2023-08-04 07:21:25,790 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 322.0) internal successors, (1610), 5 states have internal predecessors, (1610), 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) [2023-08-04 07:21:25,790 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 104 flow. Second operand 4 states and 608 transitions. [2023-08-04 07:21:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 11 transitions, 53 flow [2023-08-04 07:21:25,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 11 transitions, 47 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:21:25,791 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 07:21:25,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=322, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 07:21:25,791 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -32 predicate places. [2023-08-04 07:21:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 07:21:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 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) [2023-08-04 07:21:25,794 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 07:21:25,795 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 07:21:25,795 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 07:21:25,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:21:26,002 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 [2023-08-04 07:21:26,003 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:21:26,005 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 07:21:26,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 174 transitions, 368 flow [2023-08-04 07:21:26,097 INFO L124 PetriNetUnfolderBase]: 62/934 cut-off events. [2023-08-04 07:21:26,097 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:26,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 934 events. 62/934 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5602 event pairs, 0 based on Foata normal form. 0/824 useless extension candidates. Maximal degree in co-relation 571. Up to 32 conditions per place. [2023-08-04 07:21:26,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 174 transitions, 368 flow [2023-08-04 07:21:26,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 143 transitions, 306 flow [2023-08-04 07:21:26,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:21:26,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 143 transitions, 306 flow [2023-08-04 07:21:26,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 143 transitions, 306 flow [2023-08-04 07:21:26,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 143 transitions, 306 flow [2023-08-04 07:21:26,140 INFO L124 PetriNetUnfolderBase]: 14/438 cut-off events. [2023-08-04 07:21:26,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:26,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 438 events. 14/438 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1883 event pairs, 0 based on Foata normal form. 0/408 useless extension candidates. Maximal degree in co-relation 323. Up to 16 conditions per place. [2023-08-04 07:21:26,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 2196 [2023-08-04 07:21:32,628 INFO L134 LiptonReduction]: Checked pairs total: 5949 [2023-08-04 07:21:32,628 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 07:21:32,630 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:21:32,631 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;@546daf37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:21:32,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:21:32,636 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:21:32,636 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 07:21:32,636 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:32,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:21:32,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:21:32,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:21:32,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:21:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1146381648, now seen corresponding path program 1 times [2023-08-04 07:21:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:21:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729944387] [2023-08-04 07:21:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:32,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:21:32,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:21:32,669 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:21:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:21:32,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:21:32,712 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:21:32,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:21:32,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:21:32,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:21:32,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:21:32,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 07:21:32,718 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:21:32,719 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:21:32,719 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:21:32,719 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:21:32,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:21:32,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 204 transitions, 456 flow [2023-08-04 07:21:33,316 INFO L124 PetriNetUnfolderBase]: 282/4232 cut-off events. [2023-08-04 07:21:33,316 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:21:33,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 4232 events. 282/4232 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40389 event pairs, 0 based on Foata normal form. 0/3743 useless extension candidates. Maximal degree in co-relation 3081. Up to 162 conditions per place. [2023-08-04 07:21:33,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 204 transitions, 456 flow [2023-08-04 07:21:33,353 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 203 transitions, 450 flow [2023-08-04 07:21:33,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:21:33,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 203 transitions, 450 flow [2023-08-04 07:21:33,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 203 transitions, 450 flow [2023-08-04 07:21:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 203 transitions, 450 flow [2023-08-04 07:21:33,757 INFO L124 PetriNetUnfolderBase]: 282/4231 cut-off events. [2023-08-04 07:21:33,757 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-04 07:21:33,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 4231 events. 282/4231 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40460 event pairs, 0 based on Foata normal form. 0/3742 useless extension candidates. Maximal degree in co-relation 3078. Up to 162 conditions per place. [2023-08-04 07:21:33,840 INFO L119 LiptonReduction]: Number of co-enabled transitions 9152 [2023-08-04 07:21:43,584 INFO L134 LiptonReduction]: Checked pairs total: 28834 [2023-08-04 07:21:43,584 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-04 07:21:43,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:21:43,587 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;@546daf37, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:21:43,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:21:43,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:21:43,590 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-04 07:21:43,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:21:43,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:21:43,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:21:43,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 07:21:43,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:21:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1519026376, now seen corresponding path program 1 times [2023-08-04 07:21:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:21:43,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408394068] [2023-08-04 07:21:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:21:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:21:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:21:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:21:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408394068] [2023-08-04 07:21:43,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408394068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:21:43,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:21:43,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:21:43,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983091252] [2023-08-04 07:21:43,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:21:43,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:21:43,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:21:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:21:43,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:21:43,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 362 [2023-08-04 07:21:43,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2023-08-04 07:21:43,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:21:43,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 362 [2023-08-04 07:21:43,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand