/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:03:44,694 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:03:44,773 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:03:44,778 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:03:44,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:03:44,779 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:03:44,780 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:03:44,809 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:03:44,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:03:44,813 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:03:44,814 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:03:44,814 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:03:44,815 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:03:44,816 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:03:44,816 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:03:44,816 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:03:44,816 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:03:44,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:03:44,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:03:44,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:03:44,817 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:03:44,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:03:44,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:03:44,818 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:03:44,818 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:03:44,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:03:44,818 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:03:44,819 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:03:44,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:03:44,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:03:44,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:03:44,821 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:03:44,821 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:03:44,822 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:03:44,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:03:44,822 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:03:44,822 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:03:45,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:03:45,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:03:45,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:03:45,054 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:03:45,055 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:03:45,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 07:03:46,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:03:46,421 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:03:46,421 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 07:03:46,442 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9753d13e/5959a0df45444a2bb4f853632719af61/FLAG002b4ef07 [2023-08-04 07:03:46,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9753d13e/5959a0df45444a2bb4f853632719af61 [2023-08-04 07:03:46,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:03:46,457 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:03:46,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:03:46,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:03:46,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:03:46,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:03:46" (1/1) ... [2023-08-04 07:03:46,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbcb609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:46, skipping insertion in model container [2023-08-04 07:03:46,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:03:46" (1/1) ... [2023-08-04 07:03:46,504 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:03:46,644 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_safe016_rmo.opt_bound2.i[949,962] [2023-08-04 07:03:46,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:03:46,903 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:03:46,915 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_safe016_rmo.opt_bound2.i[949,962] [2023-08-04 07:03:46,922 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:03:46,924 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:03:46,957 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:03:46,993 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:03:46,994 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:03:47,000 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:03:47,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47 WrapperNode [2023-08-04 07:03:47,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:03:47,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:03:47,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:03:47,002 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:03:47,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,023 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,048 INFO L138 Inliner]: procedures = 177, calls = 89, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 216 [2023-08-04 07:03:47,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:03:47,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:03:47,049 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:03:47,049 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:03:47,057 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,062 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:03:47,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:03:47,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:03:47,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:03:47,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (1/1) ... [2023-08-04 07:03:47,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:03:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:03:47,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:03:47,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:03:47,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:03:47,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:03:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:03:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:03:47,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:03:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:03:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:03:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:03:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:03:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:03:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:03:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:03:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:03:47,168 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:03:47,293 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:03:47,295 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:03:47,719 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:03:47,998 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:03:47,998 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:03:48,003 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:03:48 BoogieIcfgContainer [2023-08-04 07:03:48,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:03:48,007 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:03:48,007 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:03:48,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:03:48,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:03:46" (1/3) ... [2023-08-04 07:03:48,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de99ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:03:48, skipping insertion in model container [2023-08-04 07:03:48,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:03:47" (2/3) ... [2023-08-04 07:03:48,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de99ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:03:48, skipping insertion in model container [2023-08-04 07:03:48,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:03:48" (3/3) ... [2023-08-04 07:03:48,014 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_rmo.opt_bound2.i [2023-08-04 07:03:48,021 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:03:48,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:03:48,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:03:48,031 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:03:48,113 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:03:48,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:03:48,395 INFO L124 PetriNetUnfolderBase]: 62/931 cut-off events. [2023-08-04 07:03:48,395 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:03:48,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 931 events. 62/931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5567 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 568. Up to 32 conditions per place. [2023-08-04 07:03:48,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:03:48,413 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 154 transitions, 320 flow [2023-08-04 07:03:48,417 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:03:48,434 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 154 transitions, 320 flow [2023-08-04 07:03:48,437 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 154 transitions, 320 flow [2023-08-04 07:03:48,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 154 transitions, 320 flow [2023-08-04 07:03:48,531 INFO L124 PetriNetUnfolderBase]: 46/692 cut-off events. [2023-08-04 07:03:48,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:03:48,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 692 events. 46/692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3682 event pairs, 0 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 442. Up to 32 conditions per place. [2023-08-04 07:03:48,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 2978 [2023-08-04 07:03:55,428 INFO L134 LiptonReduction]: Checked pairs total: 7763 [2023-08-04 07:03:55,428 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 07:03:55,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:03:55,446 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;@b220c1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:03:55,446 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:03:55,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:03:55,455 INFO L124 PetriNetUnfolderBase]: 4/59 cut-off events. [2023-08-04 07:03:55,455 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:03:55,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:03:55,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:03:55,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:03:55,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:03:55,461 INFO L85 PathProgramCache]: Analyzing trace with hash -607778543, now seen corresponding path program 1 times [2023-08-04 07:03:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:03:55,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123240563] [2023-08-04 07:03:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:03:55,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:03:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:03:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:03:55,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:03:55,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123240563] [2023-08-04 07:03:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123240563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:03:55,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:03:55,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:03:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70418588] [2023-08-04 07:03:55,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:03:55,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:03:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:03:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:03:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:03:55,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:03:55,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:55,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:03:55,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:03:55,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:03:58,048 INFO L124 PetriNetUnfolderBase]: 10275/14638 cut-off events. [2023-08-04 07:03:58,049 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 07:03:58,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29419 conditions, 14638 events. 10275/14638 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 82952 event pairs, 7092 based on Foata normal form. 500/13954 useless extension candidates. Maximal degree in co-relation 29405. Up to 14520 conditions per place. [2023-08-04 07:03:58,140 INFO L140 encePairwiseOnDemand]: 295/299 looper letters, 33 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-04 07:03:58,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 164 flow [2023-08-04 07:03:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:03:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:03:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:03:58,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451505016722408 [2023-08-04 07:03:58,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:03:58,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:03:58,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:03:58,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:03:58,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:58,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:58,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:58,179 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 84 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:03:58,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 164 flow [2023-08-04 07:03:58,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:03:58,184 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 88 flow [2023-08-04 07:03:58,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-04 07:03:58,191 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 07:03:58,191 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 88 flow [2023-08-04 07:03:58,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:03:58,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:03:58,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:03:58,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:03:58,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:03:58,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:03:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1248301945, now seen corresponding path program 1 times [2023-08-04 07:03:58,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:03:58,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914378571] [2023-08-04 07:03:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:03:58,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:03:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:03:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:03:58,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:03:58,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914378571] [2023-08-04 07:03:58,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914378571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:03:58,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923107513] [2023-08-04 07:03:58,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:03:58,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:03:58,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:03:58,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:03:58,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:03:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:03:58,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:03:58,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:03:58,512 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 07:03:58,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:03:58,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923107513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:03:58,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:03:58,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:03:58,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376414555] [2023-08-04 07:03:58,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:03:58,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:03:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:03:58,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:03:58,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:03:58,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:03:58,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 88 flow. Second operand has 3 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 07:03:58,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:03:58,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:03:58,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:00,011 INFO L124 PetriNetUnfolderBase]: 7656/10767 cut-off events. [2023-08-04 07:04:00,014 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 07:04:00,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21660 conditions, 10767 events. 7656/10767 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 56496 event pairs, 5406 based on Foata normal form. 0/10238 useless extension candidates. Maximal degree in co-relation 21643. Up to 10629 conditions per place. [2023-08-04 07:04:00,091 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 07:04:00,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 180 flow [2023-08-04 07:04:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-04 07:04:00,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462653288740246 [2023-08-04 07:04:00,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-04 07:04:00,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-04 07:04:00,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:00,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-04 07:04:00,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:00,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:00,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:00,099 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 88 flow. Second operand 3 states and 490 transitions. [2023-08-04 07:04:00,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 180 flow [2023-08-04 07:04:00,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:04:00,101 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 92 flow [2023-08-04 07:04:00,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-04 07:04:00,102 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 07:04:00,102 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 92 flow [2023-08-04 07:04:00,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:04:00,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:00,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:00,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:04:00,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:00,308 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:00,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:00,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1550376658, now seen corresponding path program 1 times [2023-08-04 07:04:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609238637] [2023-08-04 07:04:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:00,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:00,436 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 07:04:00,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:00,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609238637] [2023-08-04 07:04:00,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609238637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:00,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241113694] [2023-08-04 07:04:00,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:00,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:00,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:00,443 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 07:04:00,461 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 07:04:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:00,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:04:00,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:00,600 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 07:04:00,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:04:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241113694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:00,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:04:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:04:00,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187950029] [2023-08-04 07:04:00,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:00,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:04:00,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:00,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:00,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:04:00,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:01,889 INFO L124 PetriNetUnfolderBase]: 6552/9041 cut-off events. [2023-08-04 07:04:01,890 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-04 07:04:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18302 conditions, 9041 events. 6552/9041 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44946 event pairs, 5800 based on Foata normal form. 0/8656 useless extension candidates. Maximal degree in co-relation 18285. Up to 8783 conditions per place. [2023-08-04 07:04:01,935 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 39 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 07:04:01,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 196 flow [2023-08-04 07:04:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-04 07:04:01,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496098104793757 [2023-08-04 07:04:01,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-04 07:04:01,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-04 07:04:01,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:01,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-04 07:04:01,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:01,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:01,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:01,942 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 92 flow. Second operand 3 states and 493 transitions. [2023-08-04 07:04:01,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 196 flow [2023-08-04 07:04:01,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:04:01,946 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 96 flow [2023-08-04 07:04:01,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-04 07:04:01,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 07:04:01,947 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 96 flow [2023-08-04 07:04:01,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:01,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:01,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:01,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:04:02,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:04:02,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:02,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1160134764, now seen corresponding path program 1 times [2023-08-04 07:04:02,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:02,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161421815] [2023-08-04 07:04:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:02,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:02,267 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 07:04:02,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:02,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161421815] [2023-08-04 07:04:02,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161421815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:02,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529526932] [2023-08-04 07:04:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:02,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:02,270 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 07:04:02,272 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 07:04:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:02,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:04:02,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:04:02,405 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:04:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529526932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:02,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:04:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:04:02,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043574511] [2023-08-04 07:04:02,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:02,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:02,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:04:02,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:02,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:02,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:04:02,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:03,487 INFO L124 PetriNetUnfolderBase]: 5976/8241 cut-off events. [2023-08-04 07:04:03,487 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-08-04 07:04:03,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16859 conditions, 8241 events. 5976/8241 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40056 event pairs, 3960 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 16841. Up to 6943 conditions per place. [2023-08-04 07:04:03,526 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 42 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 07:04:03,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 212 flow [2023-08-04 07:04:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:03,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 07:04:03,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529542920847269 [2023-08-04 07:04:03,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 07:04:03,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 07:04:03,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:03,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 07:04:03,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:03,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:03,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:03,532 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 96 flow. Second operand 3 states and 496 transitions. [2023-08-04 07:04:03,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 212 flow [2023-08-04 07:04:03,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:04:03,534 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 100 flow [2023-08-04 07:04:03,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-04 07:04:03,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-04 07:04:03,535 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 100 flow [2023-08-04 07:04:03,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:03,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:03,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:03,545 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 07:04:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:03,741 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:03,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:03,741 INFO L85 PathProgramCache]: Analyzing trace with hash -928433020, now seen corresponding path program 1 times [2023-08-04 07:04:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:03,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192031920] [2023-08-04 07:04:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:03,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:04:03,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:03,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192031920] [2023-08-04 07:04:03,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192031920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:03,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012103925] [2023-08-04 07:04:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:03,803 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 07:04:03,805 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 07:04:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:03,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:04:03,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:04:03,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:04:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:04:03,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012103925] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:04:03,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:04:03,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:04:03,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697362389] [2023-08-04 07:04:03,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:04:03,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:04:03,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:04:03,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:04,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 299 [2023-08-04 07:04:04,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:04,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:04,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 299 [2023-08-04 07:04:04,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:04,032 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-08-04 07:04:04,032 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:04,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 21 events. 6/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 07:04:04,033 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 07:04:04,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 51 flow [2023-08-04 07:04:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:04:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:04:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 07:04:04,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083612040133779 [2023-08-04 07:04:04,035 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 07:04:04,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 07:04:04,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:04,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 07:04:04,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:04,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:04,039 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:04,039 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 100 flow. Second operand 4 states and 608 transitions. [2023-08-04 07:04:04,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 51 flow [2023-08-04 07:04:04,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 12 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:04:04,040 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 07:04:04,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 07:04:04,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -23 predicate places. [2023-08-04 07:04:04,042 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 07:04:04,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:04,045 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:04:04,053 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 07:04:04,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:04,251 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:04:04,253 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:04:04,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:04:04,339 INFO L124 PetriNetUnfolderBase]: 62/931 cut-off events. [2023-08-04 07:04:04,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:04,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 931 events. 62/931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5567 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 568. Up to 32 conditions per place. [2023-08-04 07:04:04,342 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:04:04,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 141 transitions, 302 flow [2023-08-04 07:04:04,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:04:04,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 07:04:04,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 07:04:04,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 141 transitions, 302 flow [2023-08-04 07:04:04,376 INFO L124 PetriNetUnfolderBase]: 14/435 cut-off events. [2023-08-04 07:04:04,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:04,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 435 events. 14/435 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1860 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 320. Up to 16 conditions per place. [2023-08-04 07:04:04,380 INFO L119 LiptonReduction]: Number of co-enabled transitions 2226 [2023-08-04 07:04:08,882 INFO L134 LiptonReduction]: Checked pairs total: 5949 [2023-08-04 07:04:08,882 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 07:04:08,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:04:08,884 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;@b220c1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:04:08,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:04:08,888 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:04:08,888 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:04:08,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:08,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:08,888 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:04:08,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:04:08,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:08,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2081588819, now seen corresponding path program 1 times [2023-08-04 07:04:08,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:08,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961081759] [2023-08-04 07:04:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:08,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:04:08,911 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:04:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:04:08,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:04:08,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:04:08,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:04:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:04:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:04:08,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:04:08,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:04:08,945 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:04:08,947 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:04:08,947 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:04:08,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:04:08,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:04:09,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 07:04:09,449 INFO L124 PetriNetUnfolderBase]: 282/4226 cut-off events. [2023-08-04 07:04:09,450 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:04:09,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4515 conditions, 4226 events. 282/4226 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40170 event pairs, 0 based on Foata normal form. 0/3743 useless extension candidates. Maximal degree in co-relation 3075. Up to 162 conditions per place. [2023-08-04 07:04:09,470 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 07:04:09,478 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 184 transitions, 400 flow [2023-08-04 07:04:09,478 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:04:09,478 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 184 transitions, 400 flow [2023-08-04 07:04:09,479 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 184 transitions, 400 flow [2023-08-04 07:04:09,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 184 transitions, 400 flow [2023-08-04 07:04:09,840 INFO L124 PetriNetUnfolderBase]: 201/3052 cut-off events. [2023-08-04 07:04:09,840 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:04:09,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 3052 events. 201/3052 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 26708 event pairs, 0 based on Foata normal form. 0/2731 useless extension candidates. Maximal degree in co-relation 2280. Up to 162 conditions per place. [2023-08-04 07:04:09,889 INFO L119 LiptonReduction]: Number of co-enabled transitions 7520 [2023-08-04 07:04:15,972 INFO L134 LiptonReduction]: Checked pairs total: 26908 [2023-08-04 07:04:15,972 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-04 07:04:15,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:04:15,974 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;@b220c1c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:04:15,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:04:15,980 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:04:15,980 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2023-08-04 07:04:15,981 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:04:15,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:15,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:15,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:15,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:15,981 INFO L85 PathProgramCache]: Analyzing trace with hash 535202091, now seen corresponding path program 1 times [2023-08-04 07:04:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791837961] [2023-08-04 07:04:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:04:16,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:16,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791837961] [2023-08-04 07:04:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791837961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:04:16,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:04:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557854375] [2023-08-04 07:04:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:16,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:16,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:16,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:16,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:04:16,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 337 [2023-08-04 07:04:16,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:16,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:16,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 337 [2023-08-04 07:04:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand