/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_safe001_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:01:43,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:01:43,105 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:01:43,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:01:43,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:01:43,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:01:43,114 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:01:43,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:01:43,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:01:43,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:01:43,147 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:01:43,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:01:43,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:01:43,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:01:43,148 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:01:43,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:01:43,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:01:43,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:01:43,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:01:43,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:01:43,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:01:43,150 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:01:43,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:01:43,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:01:43,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:01:43,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:01:43,152 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:01:43,153 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:01:43,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:01:43,153 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:01:43,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:01:43,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:01:43,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:01:43,154 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:01:43,154 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:01:43,155 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:01:43,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:01:43,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:01:43,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:01:43,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:01:43,423 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:01:43,423 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:01:43,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 00:01:44,757 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:01:45,042 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:01:45,042 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 00:01:45,069 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9555fa5dc/c7139fe1d1af46be8ee6fc925c7ad114/FLAGd05559b0e [2023-08-04 00:01:45,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9555fa5dc/c7139fe1d1af46be8ee6fc925c7ad114 [2023-08-04 00:01:45,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:01:45,092 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:01:45,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:01:45,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:01:45,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:01:45,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d95a55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45, skipping insertion in model container [2023-08-04 00:01:45,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,149 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:01:45,310 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_safe001_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:01:45,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:01:45,556 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:01:45,573 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_safe001_rmo.oepc_bound2.i[993,1006] [2023-08-04 00:01:45,581 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:01:45,583 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:01:45,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:01:45,668 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:01:45,668 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:01:45,673 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:01:45,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45 WrapperNode [2023-08-04 00:01:45,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:01:45,675 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:01:45,675 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:01:45,675 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:01:45,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,696 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,732 INFO L138 Inliner]: procedures = 176, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 197 [2023-08-04 00:01:45,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:01:45,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:01:45,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:01:45,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:01:45,742 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,758 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,758 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,787 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,790 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,806 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:01:45,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:01:45,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:01:45,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:01:45,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (1/1) ... [2023-08-04 00:01:45,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:01:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:01:45,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:01:45,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:01:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:01:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:01:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:01:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:01:45,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:01:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:01:45,904 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:01:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:01:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:01:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:01:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:01:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:01:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:01:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:01:45,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:01:45,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:01:45,907 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:01:46,055 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:01:46,056 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:01:46,610 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:01:46,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:01:46,939 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:01:46,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:01:46 BoogieIcfgContainer [2023-08-04 00:01:46,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:01:46,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:01:46,944 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:01:46,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:01:46,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:01:45" (1/3) ... [2023-08-04 00:01:46,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@818ca55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:01:46, skipping insertion in model container [2023-08-04 00:01:46,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:01:45" (2/3) ... [2023-08-04 00:01:46,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@818ca55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:01:46, skipping insertion in model container [2023-08-04 00:01:46,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:01:46" (3/3) ... [2023-08-04 00:01:46,951 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 00:01:46,959 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:01:46,968 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:01:46,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:01:46,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:01:47,042 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:01:47,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:01:47,257 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 00:01:47,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:01:47,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1962 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 00:01:47,266 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:01:47,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 00:01:47,275 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:01:47,289 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:01:47,293 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:01:47,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 00:01:47,325 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 00:01:47,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:01:47,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 625 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 00:01:47,330 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 00:01:52,681 INFO L134 LiptonReduction]: Checked pairs total: 3346 [2023-08-04 00:01:52,681 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 00:01:52,694 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:01:52,700 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;@6e51296d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:01:52,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:01:52,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:01:52,705 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 00:01:52,706 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:01:52,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:52,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:01:52,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:01:52,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 418551542, now seen corresponding path program 1 times [2023-08-04 00:01:52,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:52,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275762256] [2023-08-04 00:01:52,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:52,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:01:53,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:53,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275762256] [2023-08-04 00:01:53,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275762256] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:01:53,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:01:53,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:01:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089776697] [2023-08-04 00:01:53,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:01:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:01:53,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:01:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:01:53,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 241 [2023-08-04 00:01:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:53,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:53,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 241 [2023-08-04 00:01:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:53,259 INFO L124 PetriNetUnfolderBase]: 266/518 cut-off events. [2023-08-04 00:01:53,259 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 00:01:53,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1063 conditions, 518 events. 266/518 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2553 event pairs, 144 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 1044. Up to 450 conditions per place. [2023-08-04 00:01:53,267 INFO L140 encePairwiseOnDemand]: 238/241 looper letters, 20 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-04 00:01:53,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 115 flow [2023-08-04 00:01:53,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:01:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:01:53,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-04 00:01:53,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5546334716459198 [2023-08-04 00:01:53,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-04 00:01:53,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-04 00:01:53,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:53,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-04 00:01:53,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:53,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:53,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:53,297 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 65 flow. Second operand 3 states and 401 transitions. [2023-08-04 00:01:53,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 115 flow [2023-08-04 00:01:53,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:01:53,301 INFO L231 Difference]: Finished difference. Result has 35 places, 25 transitions, 73 flow [2023-08-04 00:01:53,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=35, PETRI_TRANSITIONS=25} [2023-08-04 00:01:53,306 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 00:01:53,306 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 25 transitions, 73 flow [2023-08-04 00:01:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:53,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:53,307 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:01:53,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:01:53,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:01:53,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:53,308 INFO L85 PathProgramCache]: Analyzing trace with hash 412405298, now seen corresponding path program 1 times [2023-08-04 00:01:53,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:53,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035716642] [2023-08-04 00:01:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:53,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:01:53,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:01:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:01:53,403 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:01:53,403 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:01:53,404 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:01:53,412 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:01:53,413 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:01:53,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:01:53,414 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:01:53,416 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:01:53,417 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:01:53,417 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:01:53,475 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:01:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:01:53,697 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:01:53,697 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:01:53,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9442 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:01:53,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:01:53,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-04 00:01:53,710 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:01:53,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:01:53,711 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:01:53,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-04 00:01:53,838 INFO L124 PetriNetUnfolderBase]: 12/608 cut-off events. [2023-08-04 00:01:53,838 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:01:53,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 608 events. 12/608 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2997 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 492. Up to 27 conditions per place. [2023-08-04 00:01:53,850 INFO L119 LiptonReduction]: Number of co-enabled transitions 3388 [2023-08-04 00:01:59,651 INFO L134 LiptonReduction]: Checked pairs total: 11404 [2023-08-04 00:01:59,651 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 00:01:59,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:01:59,654 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;@6e51296d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:01:59,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:01:59,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:01:59,669 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-04 00:01:59,675 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:01:59,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:59,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:59,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:01:59,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash -517326008, now seen corresponding path program 1 times [2023-08-04 00:01:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:59,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456584344] [2023-08-04 00:01:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:01:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:01:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:01:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456584344] [2023-08-04 00:01:59,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456584344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:01:59,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:01:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:01:59,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363966647] [2023-08-04 00:01:59,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:01:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:01:59,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:01:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:01:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:01:59,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:01:59,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:59,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:01:59,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:01:59,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:07,495 INFO L124 PetriNetUnfolderBase]: 36860/51486 cut-off events. [2023-08-04 00:02:07,496 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2023-08-04 00:02:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103757 conditions, 51486 events. 36860/51486 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 1675. Compared 343113 event pairs, 29454 based on Foata normal form. 0/50715 useless extension candidates. Maximal degree in co-relation 29642. Up to 47970 conditions per place. [2023-08-04 00:02:07,929 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 32 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 00:02:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 196 flow [2023-08-04 00:02:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:02:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:02:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-04 00:02:07,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691358024691358 [2023-08-04 00:02:07,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-04 00:02:07,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-04 00:02:07,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:07,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-04 00:02:07,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:07,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:07,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:07,942 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 120 flow. Second operand 3 states and 461 transitions. [2023-08-04 00:02:07,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 196 flow [2023-08-04 00:02:07,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 190 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:02:07,950 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 126 flow [2023-08-04 00:02:07,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-04 00:02:07,952 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-04 00:02:07,953 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 126 flow [2023-08-04 00:02:07,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:07,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:07,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:02:07,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:02:07,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:07,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:07,955 INFO L85 PathProgramCache]: Analyzing trace with hash -709314299, now seen corresponding path program 1 times [2023-08-04 00:02:07,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:07,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40039485] [2023-08-04 00:02:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:07,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:02:08,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40039485] [2023-08-04 00:02:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40039485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802292430] [2023-08-04 00:02:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:08,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:08,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:08,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:02:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:08,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:02:08,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:02:08,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:02:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802292430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:02:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:02:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156845746] [2023-08-04 00:02:08,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:02:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:02:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:02:08,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:02:08,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:08,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:08,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:02:08,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:15,348 INFO L124 PetriNetUnfolderBase]: 36848/51441 cut-off events. [2023-08-04 00:02:15,353 INFO L125 PetriNetUnfolderBase]: For 3231/3231 co-relation queries the response was YES. [2023-08-04 00:02:15,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103427 conditions, 51441 events. 36848/51441 cut-off events. For 3231/3231 co-relation queries the response was YES. Maximal size of possible extension queue 1673. Compared 341069 event pairs, 23904 based on Foata normal form. 9/50706 useless extension candidates. Maximal degree in co-relation 36931. Up to 47923 conditions per place. [2023-08-04 00:02:15,725 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 35 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-04 00:02:15,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 218 flow [2023-08-04 00:02:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:02:15,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:02:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-04 00:02:15,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518518518518518 [2023-08-04 00:02:15,728 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-04 00:02:15,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-04 00:02:15,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:15,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-04 00:02:15,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:15,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:15,734 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:15,734 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 126 flow. Second operand 5 states and 745 transitions. [2023-08-04 00:02:15,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 218 flow [2023-08-04 00:02:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:02:15,736 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 140 flow [2023-08-04 00:02:15,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-04 00:02:15,737 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-04 00:02:15,737 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 140 flow [2023-08-04 00:02:15,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:15,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:15,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:15,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:15,938 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 [2023-08-04 00:02:15,939 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:15,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:15,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1976900990, now seen corresponding path program 1 times [2023-08-04 00:02:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:15,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917466188] [2023-08-04 00:02:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:15,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:02:16,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:16,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917466188] [2023-08-04 00:02:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917466188] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:16,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141769108] [2023-08-04 00:02:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:16,018 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) [2023-08-04 00:02:16,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:02:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:16,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:02:16,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:02:16,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:02:16,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141769108] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:16,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:02:16,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:02:16,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866783088] [2023-08-04 00:02:16,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:16,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:02:16,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:02:16,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:16,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:02:16,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:16,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:16,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:02:16,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:22,809 INFO L124 PetriNetUnfolderBase]: 35806/50392 cut-off events. [2023-08-04 00:02:22,810 INFO L125 PetriNetUnfolderBase]: For 2986/2986 co-relation queries the response was YES. [2023-08-04 00:02:22,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101051 conditions, 50392 events. 35806/50392 cut-off events. For 2986/2986 co-relation queries the response was YES. Maximal size of possible extension queue 1710. Compared 340424 event pairs, 27838 based on Foata normal form. 0/49900 useless extension candidates. Maximal degree in co-relation 28960. Up to 46264 conditions per place. [2023-08-04 00:02:23,214 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 38 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 00:02:23,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 240 flow [2023-08-04 00:02:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:02:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:02:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 00:02:23,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753086419753086 [2023-08-04 00:02:23,217 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 00:02:23,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 00:02:23,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:23,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 00:02:23,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:23,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:23,221 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:23,221 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 140 flow. Second operand 3 states and 466 transitions. [2023-08-04 00:02:23,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 240 flow [2023-08-04 00:02:23,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 233 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:02:23,225 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 148 flow [2023-08-04 00:02:23,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-04 00:02:23,227 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-04 00:02:23,227 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 148 flow [2023-08-04 00:02:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:23,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:23,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:23,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:02:23,434 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 [2023-08-04 00:02:23,434 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:23,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash 682384972, now seen corresponding path program 1 times [2023-08-04 00:02:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157158279] [2023-08-04 00:02:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:23,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:02:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157158279] [2023-08-04 00:02:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157158279] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:23,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664175038] [2023-08-04 00:02:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:23,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:23,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:23,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:23,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:02:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:23,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:02:23,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:02:23,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:02:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:02:23,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664175038] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:02:23,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:02:23,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:02:23,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580564300] [2023-08-04 00:02:23,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:02:23,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:02:23,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:23,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:02:23,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:23,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:02:23,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:23,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:23,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:02:23,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:28,993 INFO L124 PetriNetUnfolderBase]: 28183/39128 cut-off events. [2023-08-04 00:02:28,994 INFO L125 PetriNetUnfolderBase]: For 2628/2628 co-relation queries the response was YES. [2023-08-04 00:02:29,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78858 conditions, 39128 events. 28183/39128 cut-off events. For 2628/2628 co-relation queries the response was YES. Maximal size of possible extension queue 1380. Compared 249092 event pairs, 17577 based on Foata normal form. 3/38942 useless extension candidates. Maximal degree in co-relation 28031. Up to 36121 conditions per place. [2023-08-04 00:02:29,283 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 36 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-04 00:02:29,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 233 flow [2023-08-04 00:02:29,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:02:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:02:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-08-04 00:02:29,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2023-08-04 00:02:29,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-08-04 00:02:29,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-08-04 00:02:29,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:29,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-08-04 00:02:29,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:29,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:29,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:29,293 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 148 flow. Second operand 4 states and 603 transitions. [2023-08-04 00:02:29,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 233 flow [2023-08-04 00:02:29,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:02:29,296 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 143 flow [2023-08-04 00:02:29,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:02:29,300 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:02:29,300 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 143 flow [2023-08-04 00:02:29,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:29,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:29,301 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:29,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:29,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:29,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:29,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:29,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1620314529, now seen corresponding path program 1 times [2023-08-04 00:02:29,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:29,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131429410] [2023-08-04 00:02:29,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:29,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:02:29,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:29,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131429410] [2023-08-04 00:02:29,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131429410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:29,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770714369] [2023-08-04 00:02:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:29,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:29,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:29,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:29,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:02:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:29,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:02:29,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:02:29,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:02:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770714369] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:29,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:02:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:02:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342937379] [2023-08-04 00:02:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:02:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:02:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:02:29,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:02:29,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:29,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:29,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:02:29,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:34,848 INFO L124 PetriNetUnfolderBase]: 27775/38761 cut-off events. [2023-08-04 00:02:34,848 INFO L125 PetriNetUnfolderBase]: For 2131/2131 co-relation queries the response was YES. [2023-08-04 00:02:34,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77997 conditions, 38761 events. 27775/38761 cut-off events. For 2131/2131 co-relation queries the response was YES. Maximal size of possible extension queue 1407. Compared 250986 event pairs, 7042 based on Foata normal form. 144/38716 useless extension candidates. Maximal degree in co-relation 27710. Up to 34755 conditions per place. [2023-08-04 00:02:35,102 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-04 00:02:35,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 297 flow [2023-08-04 00:02:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:02:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:02:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 760 transitions. [2023-08-04 00:02:35,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2023-08-04 00:02:35,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 760 transitions. [2023-08-04 00:02:35,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 760 transitions. [2023-08-04 00:02:35,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:35,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 760 transitions. [2023-08-04 00:02:35,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:35,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:35,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:35,111 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 143 flow. Second operand 5 states and 760 transitions. [2023-08-04 00:02:35,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 297 flow [2023-08-04 00:02:35,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 290 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:02:35,114 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 153 flow [2023-08-04 00:02:35,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-04 00:02:35,115 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-04 00:02:35,116 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 153 flow [2023-08-04 00:02:35,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:35,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:35,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:35,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:35,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:35,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1421649858, now seen corresponding path program 1 times [2023-08-04 00:02:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492811911] [2023-08-04 00:02:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:02:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:35,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492811911] [2023-08-04 00:02:35,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492811911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:35,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860419529] [2023-08-04 00:02:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:35,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:35,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:02:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:35,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:02:35,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:02:35,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:02:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:02:35,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860419529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:02:35,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:02:35,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:02:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238775956] [2023-08-04 00:02:35,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:02:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:02:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:02:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:35,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:02:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:35,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:02:35,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:39,577 INFO L124 PetriNetUnfolderBase]: 23296/32194 cut-off events. [2023-08-04 00:02:39,578 INFO L125 PetriNetUnfolderBase]: For 2629/2629 co-relation queries the response was YES. [2023-08-04 00:02:39,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65337 conditions, 32194 events. 23296/32194 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 1313. Compared 199744 event pairs, 13702 based on Foata normal form. 36/32077 useless extension candidates. Maximal degree in co-relation 23163. Up to 28852 conditions per place. [2023-08-04 00:02:39,787 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 00:02:39,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 283 flow [2023-08-04 00:02:39,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:02:39,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:02:39,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 614 transitions. [2023-08-04 00:02:39,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5685185185185185 [2023-08-04 00:02:39,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 614 transitions. [2023-08-04 00:02:39,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 614 transitions. [2023-08-04 00:02:39,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:39,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 614 transitions. [2023-08-04 00:02:39,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:39,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:39,794 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:39,794 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 153 flow. Second operand 4 states and 614 transitions. [2023-08-04 00:02:39,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 283 flow [2023-08-04 00:02:39,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 278 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:02:39,800 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 146 flow [2023-08-04 00:02:39,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-04 00:02:39,802 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-04 00:02:39,802 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 146 flow [2023-08-04 00:02:39,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:39,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:39,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:39,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:40,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:40,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:02:40,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1127745358, now seen corresponding path program 1 times [2023-08-04 00:02:40,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:40,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257695557] [2023-08-04 00:02:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:40,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:02:40,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257695557] [2023-08-04 00:02:40,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257695557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:02:40,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124489186] [2023-08-04 00:02:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:02:40,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:02:40,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:02:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:40,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:02:40,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:02:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:02:40,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:02:40,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124489186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:40,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:02:40,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:02:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110298616] [2023-08-04 00:02:40,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:40,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:02:40,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:40,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:02:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:02:40,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:02:40,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:40,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:40,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:02:40,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:02:42,853 INFO L124 PetriNetUnfolderBase]: 13312/18943 cut-off events. [2023-08-04 00:02:42,853 INFO L125 PetriNetUnfolderBase]: For 2170/2170 co-relation queries the response was YES. [2023-08-04 00:02:42,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39402 conditions, 18943 events. 13312/18943 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 766. Compared 114059 event pairs, 952 based on Foata normal form. 2304/21094 useless extension candidates. Maximal degree in co-relation 15389. Up to 13200 conditions per place. [2023-08-04 00:02:42,916 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-04 00:02:42,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 298 flow [2023-08-04 00:02:42,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:02:42,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:02:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 622 transitions. [2023-08-04 00:02:42,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575925925925926 [2023-08-04 00:02:42,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 622 transitions. [2023-08-04 00:02:42,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 622 transitions. [2023-08-04 00:02:42,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:02:42,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 622 transitions. [2023-08-04 00:02:42,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:42,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:42,924 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:42,924 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 146 flow. Second operand 4 states and 622 transitions. [2023-08-04 00:02:42,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 298 flow [2023-08-04 00:02:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 291 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:02:43,032 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 00:02:43,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 00:02:43,033 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:02:43,033 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 00:02:43,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:43,033 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:02:43,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:02:43,034 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:02:43,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:02:43,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:02:43,245 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:43,245 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:02:43,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:02:43,422 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:02:43,422 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:02:43,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9442 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:02:43,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:02:43,432 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 00:02:43,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:02:43,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:02:43,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:02:43,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 00:02:43,564 INFO L124 PetriNetUnfolderBase]: 66/1054 cut-off events. [2023-08-04 00:02:43,564 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:02:43,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1054 events. 66/1054 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6521 event pairs, 0 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 786. Up to 54 conditions per place. [2023-08-04 00:02:43,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 00:02:50,300 INFO L134 LiptonReduction]: Checked pairs total: 15941 [2023-08-04 00:02:50,301 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 00:02:50,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:02:50,308 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;@6e51296d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:02:50,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:02:50,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:02:50,314 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2023-08-04 00:02:50,314 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 00:02:50,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:02:50,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:02:50,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:02:50,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:02:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash 620473454, now seen corresponding path program 1 times [2023-08-04 00:02:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:02:50,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195685] [2023-08-04 00:02:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:02:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:02:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:02:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:02:50,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:02:50,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156195685] [2023-08-04 00:02:50,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156195685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:02:50,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:02:50,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:02:50,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7328434] [2023-08-04 00:02:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:02:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:02:50,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:02:50,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:02:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:02:50,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:02:50,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:02:50,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:02:50,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:02:50,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:03:18,194 INFO L124 PetriNetUnfolderBase]: 155552/208041 cut-off events. [2023-08-04 00:03:18,195 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2023-08-04 00:03:18,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410174 conditions, 208041 events. 155552/208041 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 5834. Compared 1428896 event pairs, 126978 based on Foata normal form. 5292/201723 useless extension candidates. Maximal degree in co-relation 117669. Up to 198414 conditions per place. [2023-08-04 00:03:19,413 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 37 selfloop transitions, 2 changer transitions 1/49 dead transitions. [2023-08-04 00:03:19,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 202 flow [2023-08-04 00:03:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:03:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:03:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 00:03:19,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-04 00:03:19,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 00:03:19,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 00:03:19,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:03:19,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 00:03:19,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:19,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:19,418 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:19,419 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 116 flow. Second operand 3 states and 468 transitions. [2023-08-04 00:03:19,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 202 flow [2023-08-04 00:03:19,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:03:19,420 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 124 flow [2023-08-04 00:03:19,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 00:03:19,421 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-04 00:03:19,421 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 124 flow [2023-08-04 00:03:19,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:19,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:03:19,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:03:19,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:03:19,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:03:19,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:03:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2036987653, now seen corresponding path program 1 times [2023-08-04 00:03:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:03:19,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895578663] [2023-08-04 00:03:19,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:19,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:03:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:03:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:03:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:03:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895578663] [2023-08-04 00:03:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895578663] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:03:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015862476] [2023-08-04 00:03:19,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:19,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:03:19,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:03:19,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:03:19,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:03:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:03:19,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:03:19,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:03:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:03:19,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:03:19,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015862476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:03:19,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:03:19,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:03:19,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692283886] [2023-08-04 00:03:19,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:03:19,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:03:19,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:03:19,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:03:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:03:19,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:03:19,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:19,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:03:19,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:03:19,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:03:42,822 INFO L124 PetriNetUnfolderBase]: 131638/176632 cut-off events. [2023-08-04 00:03:42,822 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 00:03:43,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347669 conditions, 176632 events. 131638/176632 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 5033. Compared 1206301 event pairs, 104770 based on Foata normal form. 0/170860 useless extension candidates. Maximal degree in co-relation 347632. Up to 167305 conditions per place. [2023-08-04 00:03:43,835 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 43 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 00:03:43,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 232 flow [2023-08-04 00:03:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:03:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:03:43,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 00:03:43,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-04 00:03:43,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 00:03:43,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 00:03:43,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:03:43,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 00:03:43,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:43,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:43,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:43,839 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 124 flow. Second operand 3 states and 471 transitions. [2023-08-04 00:03:43,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 232 flow [2023-08-04 00:03:43,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:03:43,840 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 134 flow [2023-08-04 00:03:43,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-04 00:03:43,841 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-08-04 00:03:43,841 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 134 flow [2023-08-04 00:03:43,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:43,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:03:43,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:03:43,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 00:03:44,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:03:44,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:03:44,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:03:44,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1041553529, now seen corresponding path program 1 times [2023-08-04 00:03:44,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:03:44,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538380923] [2023-08-04 00:03:44,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:44,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:03:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:03:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:03:44,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:03:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538380923] [2023-08-04 00:03:44,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538380923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:03:44,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084371721] [2023-08-04 00:03:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:03:44,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:03:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:03:44,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:03:44,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 00:03:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:03:44,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:03:44,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:03:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:03:44,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:03:44,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084371721] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:03:44,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:03:44,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:03:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202816975] [2023-08-04 00:03:44,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:03:44,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:03:44,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:03:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:03:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:03:44,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:03:44,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:03:44,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:03:44,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:03:44,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:06,435 INFO L124 PetriNetUnfolderBase]: 129222/171726 cut-off events. [2023-08-04 00:04:06,436 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 00:04:07,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339925 conditions, 171726 events. 129222/171726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 1149287 event pairs, 101118 based on Foata normal form. 0/165711 useless extension candidates. Maximal degree in co-relation 97808. Up to 159021 conditions per place. [2023-08-04 00:04:07,834 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 50 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 00:04:07,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 268 flow [2023-08-04 00:04:07,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:04:07,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:04:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 00:04:07,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-04 00:04:07,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 00:04:07,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 00:04:07,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:07,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 00:04:07,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 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) [2023-08-04 00:04:07,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:07,839 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:07,839 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 134 flow. Second operand 3 states and 477 transitions. [2023-08-04 00:04:07,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 268 flow [2023-08-04 00:04:07,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:04:07,843 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 144 flow [2023-08-04 00:04:07,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-08-04 00:04:07,844 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2023-08-04 00:04:07,844 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 144 flow [2023-08-04 00:04:07,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:07,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:07,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:07,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 00:04:08,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 00:04:08,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:04:08,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1676193584, now seen corresponding path program 1 times [2023-08-04 00:04:08,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:08,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764969605] [2023-08-04 00:04:08,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:04:08,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764969605] [2023-08-04 00:04:08,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764969605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:04:08,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31924842] [2023-08-04 00:04:08,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:08,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:04:08,150 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:04:08,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 00:04:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:08,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:04:08,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:04:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:04:08,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:04:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:04:08,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31924842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:04:08,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:04:08,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:04:08,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245161239] [2023-08-04 00:04:08,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:04:08,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:04:08,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:04:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:04:08,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 00:04:08,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:08,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:08,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 00:04:08,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:25,782 INFO L124 PetriNetUnfolderBase]: 101278/132404 cut-off events. [2023-08-04 00:04:25,783 INFO L125 PetriNetUnfolderBase]: For 9681/9681 co-relation queries the response was YES. [2023-08-04 00:04:26,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270998 conditions, 132404 events. 101278/132404 cut-off events. For 9681/9681 co-relation queries the response was YES. Maximal size of possible extension queue 3897. Compared 822145 event pairs, 66426 based on Foata normal form. 3/131498 useless extension candidates. Maximal degree in co-relation 96122. Up to 127384 conditions per place. [2023-08-04 00:04:26,590 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 42 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 00:04:26,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 252 flow [2023-08-04 00:04:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:04:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:04:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 609 transitions. [2023-08-04 00:04:26,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379858657243817 [2023-08-04 00:04:26,593 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 609 transitions. [2023-08-04 00:04:26,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 609 transitions. [2023-08-04 00:04:26,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:26,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 609 transitions. [2023-08-04 00:04:26,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:26,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:26,596 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:26,596 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 144 flow. Second operand 4 states and 609 transitions. [2023-08-04 00:04:26,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 252 flow [2023-08-04 00:04:26,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:04:26,602 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 156 flow [2023-08-04 00:04:26,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 00:04:26,603 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-08-04 00:04:26,603 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 156 flow [2023-08-04 00:04:26,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:26,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:26,604 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:26,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 00:04:26,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 00:04:26,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:04:26,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash -206733762, now seen corresponding path program 1 times [2023-08-04 00:04:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:26,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002145911] [2023-08-04 00:04:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:04:26,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:26,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002145911] [2023-08-04 00:04:26,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002145911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:04:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010327143] [2023-08-04 00:04:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:04:26,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:04:26,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 00:04:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:27,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:04:27,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:04:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:04:27,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:04:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 00:04:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010327143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:04:27,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:04:27,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:04:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345283750] [2023-08-04 00:04:27,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:04:27,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:04:27,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:04:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:04:27,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 00:04:27,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:27,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:27,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 00:04:27,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:41,982 INFO L124 PetriNetUnfolderBase]: 84352/109414 cut-off events. [2023-08-04 00:04:41,983 INFO L125 PetriNetUnfolderBase]: For 6957/6957 co-relation queries the response was YES. [2023-08-04 00:04:42,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223262 conditions, 109414 events. 84352/109414 cut-off events. For 6957/6957 co-relation queries the response was YES. Maximal size of possible extension queue 3567. Compared 663159 event pairs, 52642 based on Foata normal form. 36/108721 useless extension candidates. Maximal degree in co-relation 79068. Up to 104044 conditions per place. [2023-08-04 00:04:42,982 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 53 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 00:04:42,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 308 flow [2023-08-04 00:04:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:04:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:04:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:04:42,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477031802120141 [2023-08-04 00:04:42,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:04:42,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:04:42,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:42,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:04:42,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:42,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:42,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:42,989 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 156 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:04:42,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 308 flow [2023-08-04 00:04:42,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 301 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:04:42,998 INFO L231 Difference]: Finished difference. Result has 70 places, 47 transitions, 163 flow [2023-08-04 00:04:42,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2023-08-04 00:04:43,000 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-04 00:04:43,000 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 163 flow [2023-08-04 00:04:43,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:43,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:43,000 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:43,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 00:04:43,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:04:43,206 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:04:43,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash 266911529, now seen corresponding path program 1 times [2023-08-04 00:04:43,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:43,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072116894] [2023-08-04 00:04:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:04:43,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:43,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072116894] [2023-08-04 00:04:43,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072116894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:04:43,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326296608] [2023-08-04 00:04:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:43,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:04:43,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:04:43,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:04:43,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 00:04:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:43,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:04:43,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:04:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:04:43,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:04:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:04:43,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326296608] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:04:43,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:04:43,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:04:43,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264599020] [2023-08-04 00:04:43,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:04:43,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:04:43,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:04:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:04:43,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 00:04:43,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:43,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:43,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 00:04:43,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:04:56,544 INFO L124 PetriNetUnfolderBase]: 75688/96439 cut-off events. [2023-08-04 00:04:56,544 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 00:04:56,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199111 conditions, 96439 events. 75688/96439 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 3199. Compared 549770 event pairs, 35320 based on Foata normal form. 576/96862 useless extension candidates. Maximal degree in co-relation 70474. Up to 62836 conditions per place. [2023-08-04 00:04:57,167 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 65 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-04 00:04:57,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 363 flow [2023-08-04 00:04:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:04:57,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:04:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 00:04:57,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558303886925795 [2023-08-04 00:04:57,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 00:04:57,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 00:04:57,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:04:57,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 00:04:57,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:57,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:57,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:57,172 INFO L175 Difference]: Start difference. First operand has 70 places, 47 transitions, 163 flow. Second operand 4 states and 632 transitions. [2023-08-04 00:04:57,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 363 flow [2023-08-04 00:04:57,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 356 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:04:57,177 INFO L231 Difference]: Finished difference. Result has 72 places, 47 transitions, 170 flow [2023-08-04 00:04:57,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=47} [2023-08-04 00:04:57,178 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-04 00:04:57,178 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 47 transitions, 170 flow [2023-08-04 00:04:57,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:57,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:04:57,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:04:57,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:04:57,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 00:04:57,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:04:57,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:04:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -116137709, now seen corresponding path program 1 times [2023-08-04 00:04:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:04:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295948068] [2023-08-04 00:04:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:04:57,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:04:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:04:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:04:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:04:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295948068] [2023-08-04 00:04:57,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295948068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:04:57,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:04:57,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:04:57,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609261219] [2023-08-04 00:04:57,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:04:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:04:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:04:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:04:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:04:57,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 00:04:57,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 47 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:04:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:04:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 00:04:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:19,698 INFO L124 PetriNetUnfolderBase]: 135322/172463 cut-off events. [2023-08-04 00:05:19,699 INFO L125 PetriNetUnfolderBase]: For 46548/46548 co-relation queries the response was YES. [2023-08-04 00:05:20,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370177 conditions, 172463 events. 135322/172463 cut-off events. For 46548/46548 co-relation queries the response was YES. Maximal size of possible extension queue 5179. Compared 1011108 event pairs, 99112 based on Foata normal form. 4096/176547 useless extension candidates. Maximal degree in co-relation 273755. Up to 148673 conditions per place. [2023-08-04 00:05:21,022 INFO L140 encePairwiseOnDemand]: 276/283 looper letters, 65 selfloop transitions, 5 changer transitions 31/108 dead transitions. [2023-08-04 00:05:21,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 108 transitions, 564 flow [2023-08-04 00:05:21,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:05:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:05:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 797 transitions. [2023-08-04 00:05:21,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632508833922262 [2023-08-04 00:05:21,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 797 transitions. [2023-08-04 00:05:21,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 797 transitions. [2023-08-04 00:05:21,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:21,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 797 transitions. [2023-08-04 00:05:21,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 159.4) internal successors, (797), 5 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:21,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:21,028 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:21,028 INFO L175 Difference]: Start difference. First operand has 72 places, 47 transitions, 170 flow. Second operand 5 states and 797 transitions. [2023-08-04 00:05:21,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 108 transitions, 564 flow [2023-08-04 00:05:21,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 108 transitions, 550 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:05:21,187 INFO L231 Difference]: Finished difference. Result has 76 places, 51 transitions, 208 flow [2023-08-04 00:05:21,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=76, PETRI_TRANSITIONS=51} [2023-08-04 00:05:21,187 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 18 predicate places. [2023-08-04 00:05:21,187 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 51 transitions, 208 flow [2023-08-04 00:05:21,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:21,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:21,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:21,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:05:21,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:05:21,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -753091541, now seen corresponding path program 1 times [2023-08-04 00:05:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:21,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036575022] [2023-08-04 00:05:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:05:21,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:21,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036575022] [2023-08-04 00:05:21,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036575022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:05:21,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:05:21,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:05:21,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37660732] [2023-08-04 00:05:21,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:05:21,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:05:21,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:05:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:05:21,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 283 [2023-08-04 00:05:21,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 51 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:21,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:21,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 283 [2023-08-04 00:05:21,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:05:43,960 INFO L124 PetriNetUnfolderBase]: 122560/157752 cut-off events. [2023-08-04 00:05:43,960 INFO L125 PetriNetUnfolderBase]: For 84732/87939 co-relation queries the response was YES. [2023-08-04 00:05:44,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382350 conditions, 157752 events. 122560/157752 cut-off events. For 84732/87939 co-relation queries the response was YES. Maximal size of possible extension queue 5157. Compared 952069 event pairs, 35956 based on Foata normal form. 4002/159451 useless extension candidates. Maximal degree in co-relation 328107. Up to 123116 conditions per place. [2023-08-04 00:05:45,410 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 57 selfloop transitions, 3 changer transitions 29/100 dead transitions. [2023-08-04 00:05:45,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 100 transitions, 533 flow [2023-08-04 00:05:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:05:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:05:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 803 transitions. [2023-08-04 00:05:45,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674911660777385 [2023-08-04 00:05:45,412 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 803 transitions. [2023-08-04 00:05:45,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 803 transitions. [2023-08-04 00:05:45,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:05:45,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 803 transitions. [2023-08-04 00:05:45,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:45,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:45,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:45,416 INFO L175 Difference]: Start difference. First operand has 76 places, 51 transitions, 208 flow. Second operand 5 states and 803 transitions. [2023-08-04 00:05:45,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 100 transitions, 533 flow [2023-08-04 00:05:48,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 100 transitions, 524 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:05:48,082 INFO L231 Difference]: Finished difference. Result has 79 places, 53 transitions, 228 flow [2023-08-04 00:05:48,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=228, PETRI_PLACES=79, PETRI_TRANSITIONS=53} [2023-08-04 00:05:48,082 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2023-08-04 00:05:48,082 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 53 transitions, 228 flow [2023-08-04 00:05:48,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:48,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:05:48,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:05:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:05:48,083 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:05:48,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:05:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1414820194, now seen corresponding path program 1 times [2023-08-04 00:05:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:05:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246423087] [2023-08-04 00:05:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:05:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:05:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:05:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:05:48,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:05:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246423087] [2023-08-04 00:05:48,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246423087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:05:48,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:05:48,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:05:48,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746111769] [2023-08-04 00:05:48,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:05:48,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:05:48,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:05:48,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:05:48,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:05:48,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 283 [2023-08-04 00:05:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 53 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:05:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:05:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 283 [2023-08-04 00:05:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:06:10,110 INFO L124 PetriNetUnfolderBase]: 117522/153166 cut-off events. [2023-08-04 00:06:10,110 INFO L125 PetriNetUnfolderBase]: For 139136/140266 co-relation queries the response was YES. [2023-08-04 00:06:11,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404929 conditions, 153166 events. 117522/153166 cut-off events. For 139136/140266 co-relation queries the response was YES. Maximal size of possible extension queue 4830. Compared 985711 event pairs, 39878 based on Foata normal form. 3420/155476 useless extension candidates. Maximal degree in co-relation 404844. Up to 122110 conditions per place. [2023-08-04 00:06:11,650 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 75 selfloop transitions, 3 changer transitions 31/120 dead transitions. [2023-08-04 00:06:11,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 705 flow [2023-08-04 00:06:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:06:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:06:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 822 transitions. [2023-08-04 00:06:11,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5809187279151944 [2023-08-04 00:06:11,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 822 transitions. [2023-08-04 00:06:11,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 822 transitions. [2023-08-04 00:06:11,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:06:11,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 822 transitions. [2023-08-04 00:06:11,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:11,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:11,657 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:11,657 INFO L175 Difference]: Start difference. First operand has 79 places, 53 transitions, 228 flow. Second operand 5 states and 822 transitions. [2023-08-04 00:06:11,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 705 flow [2023-08-04 00:06:14,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 120 transitions, 698 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:06:14,206 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 250 flow [2023-08-04 00:06:14,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2023-08-04 00:06:14,206 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2023-08-04 00:06:14,206 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 250 flow [2023-08-04 00:06:14,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:14,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:06:14,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:06:14,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 00:06:14,207 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:06:14,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:06:14,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2005083797, now seen corresponding path program 1 times [2023-08-04 00:06:14,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:06:14,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260576280] [2023-08-04 00:06:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:06:14,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:06:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:06:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:06:14,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:06:14,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260576280] [2023-08-04 00:06:14,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260576280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:06:14,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:06:14,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:06:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296003936] [2023-08-04 00:06:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:06:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:06:14,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:06:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:06:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:06:14,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 00:06:14,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:06:14,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:06:14,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 00:06:14,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand