/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/pthread-wmm_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:51:37,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:51:37,586 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:51:37,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:51:37,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:51:37,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:51:37,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:51:37,613 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:51:37,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:51:37,616 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:51:37,617 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:51:37,617 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:51:37,619 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:51:37,619 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:51:37,620 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:51:37,620 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:51:37,620 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:51:37,620 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:51:37,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:51:37,621 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:51:37,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:51:37,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:51:37,621 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:51:37,621 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:51:37,622 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:51:37,622 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:51:37,622 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:51:37,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:51:37,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:51:37,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:51:37,624 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:51:37,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:51:37,625 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:51:37,625 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:51:37,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:51:37,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:51:37,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:51:37,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:51:37,798 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:51:37,798 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:51:37,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:51:38,696 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:51:38,890 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:51:38,891 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:51:38,903 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e715fa8c7/36eb66091a714bf4adca3c52216d22ac/FLAG06efa267d [2023-08-03 23:51:38,914 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e715fa8c7/36eb66091a714bf4adca3c52216d22ac [2023-08-03 23:51:38,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:51:38,917 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:51:38,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:51:38,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:51:38,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:51:38,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:51:38" (1/1) ... [2023-08-03 23:51:38,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5844cdbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:38, skipping insertion in model container [2023-08-03 23:51:38,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:51:38" (1/1) ... [2023-08-03 23:51:38,944 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:51:39,034 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_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i[979,992] [2023-08-03 23:51:39,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:51:39,132 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:51:39,139 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_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i[979,992] [2023-08-03 23:51:39,145 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:51:39,146 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:51:39,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:51:39,198 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:51:39,199 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:51:39,203 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:51:39,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39 WrapperNode [2023-08-03 23:51:39,203 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:51:39,204 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:51:39,205 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:51:39,205 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:51:39,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,259 INFO L138 Inliner]: procedures = 175, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 128 [2023-08-03 23:51:39,259 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:51:39,260 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:51:39,260 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:51:39,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:51:39,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,278 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,294 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:51:39,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:51:39,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:51:39,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:51:39,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (1/1) ... [2023-08-03 23:51:39,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:51:39,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:51:39,322 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 23:51:39,336 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 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:51:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:51:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:51:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:51:39,348 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:51:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:51:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:51:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:51:39,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:51:39,349 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 23:51:39,434 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:51:39,435 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:51:39,588 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:51:39,710 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:51:39,711 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 23:51:39,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:51:39 BoogieIcfgContainer [2023-08-03 23:51:39,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:51:39,713 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:51:39,713 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:51:39,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:51:39,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:51:38" (1/3) ... [2023-08-03 23:51:39,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c5892f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:51:39, skipping insertion in model container [2023-08-03 23:51:39,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:51:39" (2/3) ... [2023-08-03 23:51:39,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20c5892f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:51:39, skipping insertion in model container [2023-08-03 23:51:39,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:51:39" (3/3) ... [2023-08-03 23:51:39,720 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix054_power.oepc_power.opt_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:51:39,726 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:51:39,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:51:39,732 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:51:39,732 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:51:39,766 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:51:39,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 101 transitions, 212 flow [2023-08-03 23:51:39,833 INFO L124 PetriNetUnfolderBase]: 14/216 cut-off events. [2023-08-03 23:51:39,833 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:51:39,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 216 events. 14/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 591 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-03 23:51:39,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 101 transitions, 212 flow [2023-08-03 23:51:39,839 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 74 transitions, 158 flow [2023-08-03 23:51:39,841 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:51:39,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 74 transitions, 158 flow [2023-08-03 23:51:39,848 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 74 transitions, 158 flow [2023-08-03 23:51:39,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 74 transitions, 158 flow [2023-08-03 23:51:39,863 INFO L124 PetriNetUnfolderBase]: 2/108 cut-off events. [2023-08-03 23:51:39,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:51:39,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 108 events. 2/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 153 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-03 23:51:39,865 INFO L119 LiptonReduction]: Number of co-enabled transitions 652 [2023-08-03 23:51:41,745 INFO L134 LiptonReduction]: Checked pairs total: 1516 [2023-08-03 23:51:41,746 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-03 23:51:41,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:51:41,758 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;@7f29384a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:51:41,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 23:51:41,761 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:51:41,761 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 23:51:41,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:51:41,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:41,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:51:41,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:41,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash 412020346, now seen corresponding path program 1 times [2023-08-03 23:51:41,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:41,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120663007] [2023-08-03 23:51:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:41,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:51:41,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120663007] [2023-08-03 23:51:41,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120663007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:51:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:51:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785843439] [2023-08-03 23:51:41,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:51:41,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:51:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:51:41,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 162 [2023-08-03 23:51:41,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 23:51:41,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:41,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 162 [2023-08-03 23:51:41,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:42,022 INFO L124 PetriNetUnfolderBase]: 72/155 cut-off events. [2023-08-03 23:51:42,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:51:42,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 155 events. 72/155 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 570 event pairs, 20 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 303. Up to 138 conditions per place. [2023-08-03 23:51:42,024 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 18 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-03 23:51:42,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 96 flow [2023-08-03 23:51:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:51:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:51:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2023-08-03 23:51:42,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2023-08-03 23:51:42,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 273 transitions. [2023-08-03 23:51:42,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 273 transitions. [2023-08-03 23:51:42,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:42,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 273 transitions. [2023-08-03 23:51:42,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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 23:51:42,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 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 23:51:42,044 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 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 23:51:42,045 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 46 flow. Second operand 3 states and 273 transitions. [2023-08-03 23:51:42,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 96 flow [2023-08-03 23:51:42,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:51:42,048 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 54 flow [2023-08-03 23:51:42,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2023-08-03 23:51:42,053 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-08-03 23:51:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 54 flow [2023-08-03 23:51:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 23:51:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:51:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:51:42,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:42,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -114989708, now seen corresponding path program 1 times [2023-08-03 23:51:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:42,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499101933] [2023-08-03 23:51:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:51:42,087 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:51:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:51:42,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:51:42,119 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:51:42,120 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 23:51:42,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 23:51:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:51:42,123 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:51:42,125 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 23:51:42,125 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:51:42,125 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:51:42,146 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:51:42,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:42,194 INFO L124 PetriNetUnfolderBase]: 30/446 cut-off events. [2023-08-03 23:51:42,194 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:51:42,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 446 events. 30/446 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1857 event pairs, 0 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 324. Up to 18 conditions per place. [2023-08-03 23:51:42,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:42,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 91 transitions, 206 flow [2023-08-03 23:51:42,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:51:42,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 91 transitions, 206 flow [2023-08-03 23:51:42,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 91 transitions, 206 flow [2023-08-03 23:51:42,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 91 transitions, 206 flow [2023-08-03 23:51:42,214 INFO L124 PetriNetUnfolderBase]: 3/203 cut-off events. [2023-08-03 23:51:42,214 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:51:42,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 203 events. 3/203 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 500 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 162. Up to 9 conditions per place. [2023-08-03 23:51:42,216 INFO L119 LiptonReduction]: Number of co-enabled transitions 1816 [2023-08-03 23:51:44,134 INFO L134 LiptonReduction]: Checked pairs total: 5820 [2023-08-03 23:51:44,135 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-03 23:51:44,136 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:51:44,136 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;@7f29384a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:51:44,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 23:51:44,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:51:44,140 INFO L124 PetriNetUnfolderBase]: 0/36 cut-off events. [2023-08-03 23:51:44,140 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 23:51:44,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:44,140 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-03 23:51:44,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:44,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1086092936, now seen corresponding path program 1 times [2023-08-03 23:51:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:44,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954358159] [2023-08-03 23:51:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:51:44,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:44,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954358159] [2023-08-03 23:51:44,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954358159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:44,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:51:44,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:51:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563704236] [2023-08-03 23:51:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:51:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:51:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:51:44,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 184 [2023-08-03 23:51:44,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 23:51:44,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:44,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 184 [2023-08-03 23:51:44,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:44,800 INFO L124 PetriNetUnfolderBase]: 4712/6886 cut-off events. [2023-08-03 23:51:44,800 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-08-03 23:51:44,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14263 conditions, 6886 events. 4712/6886 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 38522 event pairs, 3180 based on Foata normal form. 0/6122 useless extension candidates. Maximal degree in co-relation 3219. Up to 6628 conditions per place. [2023-08-03 23:51:44,835 INFO L140 encePairwiseOnDemand]: 181/184 looper letters, 29 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2023-08-03 23:51:44,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 160 flow [2023-08-03 23:51:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:51:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:51:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-03 23:51:44,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688405797101449 [2023-08-03 23:51:44,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-03 23:51:44,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-03 23:51:44,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:44,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-03 23:51:44,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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 23:51:44,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 23:51:44,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 184.0) internal successors, (736), 4 states have internal predecessors, (736), 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 23:51:44,845 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 86 flow. Second operand 3 states and 314 transitions. [2023-08-03 23:51:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 160 flow [2023-08-03 23:51:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 156 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:51:44,849 INFO L231 Difference]: Finished difference. Result has 43 places, 32 transitions, 94 flow [2023-08-03 23:51:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=32} [2023-08-03 23:51:44,849 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-03 23:51:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 32 transitions, 94 flow [2023-08-03 23:51:44,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 23:51:44,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:44,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:51:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:51:44,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:44,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2030681222, now seen corresponding path program 1 times [2023-08-03 23:51:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:44,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599529711] [2023-08-03 23:51:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:44,940 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 23:51:44,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599529711] [2023-08-03 23:51:44,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599529711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:51:44,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010429102] [2023-08-03 23:51:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:44,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:51:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:51:44,943 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 23:51:44,948 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 23:51:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:45,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:51:45,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:51:45,046 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 23:51:45,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:51:45,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010429102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:45,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:51:45,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:51:45,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431695946] [2023-08-03 23:51:45,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:51:45,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:51:45,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:51:45,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 184 [2023-08-03 23:51:45,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 32 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 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 23:51:45,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:45,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 184 [2023-08-03 23:51:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:45,636 INFO L124 PetriNetUnfolderBase]: 4672/6851 cut-off events. [2023-08-03 23:51:45,636 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-08-03 23:51:45,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14141 conditions, 6851 events. 4672/6851 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38896 event pairs, 1920 based on Foata normal form. 25/6152 useless extension candidates. Maximal degree in co-relation 3726. Up to 6499 conditions per place. [2023-08-03 23:51:45,662 INFO L140 encePairwiseOnDemand]: 180/184 looper letters, 36 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-08-03 23:51:45,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 200 flow [2023-08-03 23:51:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:51:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:51:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-08-03 23:51:45,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-03 23:51:45,666 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-08-03 23:51:45,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-08-03 23:51:45,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:45,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-08-03 23:51:45,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 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 23:51:45,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 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 23:51:45,669 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 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 23:51:45,669 INFO L175 Difference]: Start difference. First operand has 43 places, 32 transitions, 94 flow. Second operand 5 states and 506 transitions. [2023-08-03 23:51:45,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 200 flow [2023-08-03 23:51:45,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:51:45,671 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 108 flow [2023-08-03 23:51:45,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-03 23:51:45,673 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2023-08-03 23:51:45,673 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 108 flow [2023-08-03 23:51:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 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 23:51:45,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:45,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:51:45,678 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 23:51:45,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:51:45,878 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:45,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1112334628, now seen corresponding path program 1 times [2023-08-03 23:51:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:45,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638827770] [2023-08-03 23:51:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:45,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:51:45,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:45,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638827770] [2023-08-03 23:51:45,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638827770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:51:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85604901] [2023-08-03 23:51:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:45,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:51:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:51:45,923 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 23:51:45,927 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 23:51:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:45,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:51:45,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:51:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:51:46,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:51:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:51:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85604901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:51:46,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:51:46,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:51:46,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714729081] [2023-08-03 23:51:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:51:46,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:51:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:51:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:51:46,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 184 [2023-08-03 23:51:46,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 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 23:51:46,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:46,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 184 [2023-08-03 23:51:46,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:46,488 INFO L124 PetriNetUnfolderBase]: 4108/5937 cut-off events. [2023-08-03 23:51:46,489 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2023-08-03 23:51:46,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12331 conditions, 5937 events. 4108/5937 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31853 event pairs, 1600 based on Foata normal form. 5/5284 useless extension candidates. Maximal degree in co-relation 3201. Up to 5631 conditions per place. [2023-08-03 23:51:46,517 INFO L140 encePairwiseOnDemand]: 181/184 looper letters, 36 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-03 23:51:46,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 206 flow [2023-08-03 23:51:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:51:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:51:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 412 transitions. [2023-08-03 23:51:46,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2023-08-03 23:51:46,518 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 412 transitions. [2023-08-03 23:51:46,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 412 transitions. [2023-08-03 23:51:46,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:46,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 412 transitions. [2023-08-03 23:51:46,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 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 23:51:46,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 23:51:46,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 23:51:46,521 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 108 flow. Second operand 4 states and 412 transitions. [2023-08-03 23:51:46,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 206 flow [2023-08-03 23:51:46,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 201 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:51:46,522 INFO L231 Difference]: Finished difference. Result has 47 places, 31 transitions, 101 flow [2023-08-03 23:51:46,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=47, PETRI_TRANSITIONS=31} [2023-08-03 23:51:46,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 7 predicate places. [2023-08-03 23:51:46,523 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 31 transitions, 101 flow [2023-08-03 23:51:46,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 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 23:51:46,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:46,523 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:51:46,531 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 23:51:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:51:46,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:51:46,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:46,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1162472191, now seen corresponding path program 1 times [2023-08-03 23:51:46,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:46,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236424490] [2023-08-03 23:51:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:46,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:51:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236424490] [2023-08-03 23:51:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236424490] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:46,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:51:46,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:51:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140312192] [2023-08-03 23:51:46,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:51:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:51:46,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:51:46,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 184 [2023-08-03 23:51:46,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 31 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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 23:51:46,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:46,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 184 [2023-08-03 23:51:46,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:47,090 INFO L124 PetriNetUnfolderBase]: 2108/3243 cut-off events. [2023-08-03 23:51:47,090 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2023-08-03 23:51:47,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6917 conditions, 3243 events. 2108/3243 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16538 event pairs, 68 based on Foata normal form. 625/3460 useless extension candidates. Maximal degree in co-relation 2493. Up to 2550 conditions per place. [2023-08-03 23:51:47,097 INFO L140 encePairwiseOnDemand]: 182/184 looper letters, 0 selfloop transitions, 0 changer transitions 50/50 dead transitions. [2023-08-03 23:51:47,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 229 flow [2023-08-03 23:51:47,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:51:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:51:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 422 transitions. [2023-08-03 23:51:47,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733695652173914 [2023-08-03 23:51:47,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 422 transitions. [2023-08-03 23:51:47,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 422 transitions. [2023-08-03 23:51:47,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:47,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 422 transitions. [2023-08-03 23:51:47,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:51:47,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 23:51:47,101 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 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 23:51:47,101 INFO L175 Difference]: Start difference. First operand has 47 places, 31 transitions, 101 flow. Second operand 4 states and 422 transitions. [2023-08-03 23:51:47,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 229 flow [2023-08-03 23:51:47,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:51:47,105 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-03 23:51:47,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-03 23:51:47,106 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-03 23:51:47,106 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-03 23:51:47,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 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 23:51:47,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 23:51:47,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 23:51:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 23:51:47,107 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 23:51:47,107 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 23:51:47,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,136 INFO L124 PetriNetUnfolderBase]: 30/446 cut-off events. [2023-08-03 23:51:47,136 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:51:47,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 446 events. 30/446 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1857 event pairs, 0 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 324. Up to 18 conditions per place. [2023-08-03 23:51:47,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:51:47,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 118 transitions, 260 flow [2023-08-03 23:51:47,163 INFO L124 PetriNetUnfolderBase]: 30/446 cut-off events. [2023-08-03 23:51:47,164 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:51:47,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 446 events. 30/446 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1857 event pairs, 0 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 324. Up to 18 conditions per place. [2023-08-03 23:51:47,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 3436 [2023-08-03 23:51:49,290 INFO L134 LiptonReduction]: Checked pairs total: 10227 [2023-08-03 23:51:49,290 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-03 23:51:49,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:51:49,292 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;@7f29384a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:51:49,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:51:49,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:51:49,293 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 23:51:49,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:51:49,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:49,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:51:49,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:51:49,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash 22395103, now seen corresponding path program 1 times [2023-08-03 23:51:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:49,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903103361] [2023-08-03 23:51:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:49,359 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 23:51:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903103361] [2023-08-03 23:51:49,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903103361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:49,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:51:49,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:51:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991850275] [2023-08-03 23:51:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:49,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:51:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:51:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:51:49,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-03 23:51:49,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 23:51:49,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:49,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-03 23:51:49,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:51,344 INFO L124 PetriNetUnfolderBase]: 20420/29722 cut-off events. [2023-08-03 23:51:51,345 INFO L125 PetriNetUnfolderBase]: For 446/446 co-relation queries the response was YES. [2023-08-03 23:51:51,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58233 conditions, 29722 events. 20420/29722 cut-off events. For 446/446 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 193567 event pairs, 3926 based on Foata normal form. 837/26332 useless extension candidates. Maximal degree in co-relation 49593. Up to 26049 conditions per place. [2023-08-03 23:51:51,475 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 53 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-03 23:51:51,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 273 flow [2023-08-03 23:51:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:51:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:51:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-03 23:51:51,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492957746478874 [2023-08-03 23:51:51,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-03 23:51:51,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-03 23:51:51,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:51,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-03 23:51:51,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 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 23:51:51,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 23:51:51,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 23:51:51,478 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 102 flow. Second operand 3 states and 351 transitions. [2023-08-03 23:51:51,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 273 flow [2023-08-03 23:51:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 269 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:51:51,480 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 117 flow [2023-08-03 23:51:51,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-03 23:51:51,481 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-03 23:51:51,482 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 117 flow [2023-08-03 23:51:51,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 23:51:51,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:51,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:51:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 23:51:51,482 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:51:51,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 42003480, now seen corresponding path program 1 times [2023-08-03 23:51:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:51,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428350422] [2023-08-03 23:51:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:51,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:51:51,508 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 23:51:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:51:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428350422] [2023-08-03 23:51:51,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428350422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:51:51,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:51:51,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:51:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985391145] [2023-08-03 23:51:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:51:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:51:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:51:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:51:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:51:51,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 213 [2023-08-03 23:51:51,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 23:51:51,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:51:51,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 213 [2023-08-03 23:51:51,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:51:53,526 INFO L124 PetriNetUnfolderBase]: 20048/27633 cut-off events. [2023-08-03 23:51:53,526 INFO L125 PetriNetUnfolderBase]: For 2909/2909 co-relation queries the response was YES. [2023-08-03 23:51:53,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60620 conditions, 27633 events. 20048/27633 cut-off events. For 2909/2909 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 159621 event pairs, 15274 based on Foata normal form. 0/23492 useless extension candidates. Maximal degree in co-relation 39242. Up to 27351 conditions per place. [2023-08-03 23:51:53,626 INFO L140 encePairwiseOnDemand]: 210/213 looper letters, 37 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 23:51:53,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 45 transitions, 208 flow [2023-08-03 23:51:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:51:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:51:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-03 23:51:53,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5007824726134585 [2023-08-03 23:51:53,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-03 23:51:53,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-03 23:51:53,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:51:53,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-03 23:51:53,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 23:51:53,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 23:51:53,629 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 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 23:51:53,629 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 117 flow. Second operand 3 states and 320 transitions. [2023-08-03 23:51:53,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 45 transitions, 208 flow [2023-08-03 23:51:53,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:51:53,630 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 126 flow [2023-08-03 23:51:53,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2023-08-03 23:51:53,631 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2023-08-03 23:51:53,632 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 126 flow [2023-08-03 23:51:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 23:51:53,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:51:53,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:51:53,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:51:53,632 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:51:53,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:51:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 565449542, now seen corresponding path program 1 times [2023-08-03 23:51:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:51:53,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534350096] [2023-08-03 23:51:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:51:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:51:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:51:53,644 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:51:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:51:53,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:51:53,660 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:51:53,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:51:53,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:51:53,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:51:53,661 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:51:53,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:51:53,661 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 23:51:53,662 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:51:53,664 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:51:53,664 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:51:53,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:51:53 BasicIcfg [2023-08-03 23:51:53,710 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:51:53,710 INFO L158 Benchmark]: Toolchain (without parser) took 14793.37ms. Allocated memory was 555.7MB in the beginning and 2.1GB in the end (delta: 1.6GB). Free memory was 514.4MB in the beginning and 1.6GB in the end (delta: -1.0GB). Peak memory consumption was 523.9MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,711 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 381.7MB. Free memory was 335.2MB in the beginning and 335.1MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:51:53,711 INFO L158 Benchmark]: CACSL2BoogieTranslator took 285.83ms. Allocated memory is still 555.7MB. Free memory was 514.1MB in the beginning and 491.4MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,711 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.14ms. Allocated memory is still 555.7MB. Free memory was 491.4MB in the beginning and 488.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,711 INFO L158 Benchmark]: Boogie Preprocessor took 38.60ms. Allocated memory is still 555.7MB. Free memory was 488.9MB in the beginning and 487.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,711 INFO L158 Benchmark]: RCFGBuilder took 413.39ms. Allocated memory is still 555.7MB. Free memory was 487.2MB in the beginning and 519.9MB in the end (delta: -32.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,712 INFO L158 Benchmark]: TraceAbstraction took 13996.76ms. Allocated memory was 555.7MB in the beginning and 2.1GB in the end (delta: 1.6GB). Free memory was 518.9MB in the beginning and 1.6GB in the end (delta: -1.0GB). Peak memory consumption was 528.0MB. Max. memory is 16.0GB. [2023-08-03 23:51:53,713 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 381.7MB. Free memory was 335.2MB in the beginning and 335.1MB in the end (delta: 140.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 285.83ms. Allocated memory is still 555.7MB. Free memory was 514.1MB in the beginning and 491.4MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.14ms. Allocated memory is still 555.7MB. Free memory was 491.4MB in the beginning and 488.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.60ms. Allocated memory is still 555.7MB. Free memory was 488.9MB in the beginning and 487.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 413.39ms. Allocated memory is still 555.7MB. Free memory was 487.2MB in the beginning and 519.9MB in the end (delta: -32.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 13996.76ms. Allocated memory was 555.7MB in the beginning and 2.1GB in the end (delta: 1.6GB). Free memory was 518.9MB in the beginning and 1.6GB in the end (delta: -1.0GB). Peak memory consumption was 528.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 78 PlacesBefore, 23 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 652 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 61 TotalNumberOfCompositions, 1516 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 942, independent: 861, independent conditional: 0, independent unconditional: 861, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 337, independent: 327, independent conditional: 0, independent unconditional: 327, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 942, independent: 534, independent conditional: 0, independent unconditional: 534, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 337, unknown conditional: 0, unknown unconditional: 337] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 39, Positive conditional cache size: 0, Positive unconditional cache size: 39, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 99 PlacesBefore, 40 PlacesAfterwards, 91 TransitionsBefore, 31 TransitionsAfterwards, 1816 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 1 ChoiceCompositions, 66 TotalNumberOfCompositions, 5820 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2003, independent: 1832, independent conditional: 0, independent unconditional: 1832, dependent: 171, dependent conditional: 0, dependent unconditional: 171, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 825, independent: 798, independent conditional: 0, independent unconditional: 798, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2003, independent: 1034, independent conditional: 0, independent unconditional: 1034, dependent: 144, dependent conditional: 0, dependent unconditional: 144, unknown: 825, unknown conditional: 0, unknown unconditional: 825] , Statistics on independence cache: Total cache size (in pairs): 115, Positive cache size: 102, Positive conditional cache size: 0, Positive unconditional cache size: 102, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 123 PlacesBefore, 47 PlacesAfterwards, 118 TransitionsBefore, 39 TransitionsAfterwards, 3436 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 95 TotalNumberOfCompositions, 10227 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3520, independent: 3308, independent conditional: 0, independent unconditional: 3308, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1616, independent: 1577, independent conditional: 0, independent unconditional: 1577, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3520, independent: 1731, independent conditional: 0, independent unconditional: 1731, dependent: 173, dependent conditional: 0, dependent unconditional: 173, unknown: 1616, unknown conditional: 0, unknown unconditional: 1616] , Statistics on independence cache: Total cache size (in pairs): 139, Positive cache size: 120, Positive conditional cache size: 0, Positive unconditional cache size: 120, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p1_EAX = 0; [L711] 0 _Bool main$tmp_guard0; [L712] 0 _Bool main$tmp_guard1; [L714] 0 int x = 0; [L716] 0 int y = 0; [L717] 0 _Bool y$flush_delayed; [L718] 0 int y$mem_tmp; [L719] 0 _Bool y$r_buff0_thd0; [L720] 0 _Bool y$r_buff0_thd1; [L721] 0 _Bool y$r_buff0_thd2; [L722] 0 _Bool y$r_buff1_thd0; [L723] 0 _Bool y$r_buff1_thd1; [L724] 0 _Bool y$r_buff1_thd2; [L725] 0 _Bool y$read_delayed; [L726] 0 int *y$read_delayed_var; [L727] 0 int y$w_buff0; [L728] 0 _Bool y$w_buff0_used; [L729] 0 int y$w_buff1; [L730] 0 _Bool y$w_buff1_used; [L731] 0 _Bool weak$$choice0; [L732] 0 _Bool weak$$choice2; [L805] 0 pthread_t t1441[2]; [L806] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1441={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L806] COND TRUE 0 asdf<2 [L806] FCALL, FORK 0 pthread_create(&t1441[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1441[asdf], ((void *)0), P0, ((void *)0))=-2, t1441={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L736] 1 y$w_buff1 = y$w_buff0 [L737] 1 y$w_buff0 = 1 [L738] 1 y$w_buff1_used = y$w_buff0_used [L739] 1 y$w_buff0_used = (_Bool)1 [L740] CALL 1 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L740] RET 1 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L741] 1 y$r_buff1_thd0 = y$r_buff0_thd0 [L742] 1 y$r_buff1_thd1 = y$r_buff0_thd1 [L743] 1 y$r_buff1_thd2 = y$r_buff0_thd2 [L744] 1 y$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=1, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=1, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L806] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1441={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=1, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=1, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L806] COND TRUE 0 asdf<2 [L806] FCALL, FORK 0 pthread_create(&t1441[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1441[asdf], ((void *)0), P0, ((void *)0))=-1, t1441={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=1, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=1, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L736] 2 y$w_buff1 = y$w_buff0 [L737] 2 y$w_buff0 = 1 [L738] 2 y$w_buff1_used = y$w_buff0_used [L739] 2 y$w_buff0_used = (_Bool)1 [L740] CALL 2 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=1, y$r_buff0_thd2=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=1, y$w_buff0_used=1, y$w_buff1=1, y$w_buff1_used=1, y=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 115 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: 2.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 36 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=1, InterpolantAutomatonStates: 3, 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, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 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, 132 locations, 6 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: 5.0s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 162 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 126 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 332 IncrementalHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 3 mSDtfsCounter, 332 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 284 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 42/50 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, 132 locations, 6 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: 6.6s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 135 IncrementalHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 8 mSDtfsCounter, 135 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=2, InterpolantAutomatonStates: 6, 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, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-03 23:51:53,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...