/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_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:23:35,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:23:35,413 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:23:35,417 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:23:35,417 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:23:35,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:23:35,418 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:23:35,450 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:23:35,451 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:23:35,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:23:35,455 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:23:35,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:23:35,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:23:35,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:23:35,457 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:23:35,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:23:35,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:23:35,458 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:23:35,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:23:35,458 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:23:35,458 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:23:35,459 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:23:35,459 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:23:35,459 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:23:35,459 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:23:35,460 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:23:35,460 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:23:35,460 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:23:35,461 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:23:35,461 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:23:35,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:23:35,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:23:35,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:23:35,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:23:35,463 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:23:35,464 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:23:35,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:23:35,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:23:35,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:23:35,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:23:35,736 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:23:35,737 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:23:35,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:23:36,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:23:37,210 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:23:37,211 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:23:37,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd898ffbc/ad9ab5512f3c43aeb56c9b398a9b10aa/FLAGb07b204f9 [2023-08-04 07:23:37,237 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd898ffbc/ad9ab5512f3c43aeb56c9b398a9b10aa [2023-08-04 07:23:37,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:23:37,241 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:23:37,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:23:37,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:23:37,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:23:37,245 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12a9f90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37, skipping insertion in model container [2023-08-04 07:23:37,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,297 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:23:37,417 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_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:23:37,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:23:37,547 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:23:37,558 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:23:37,567 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:23:37,569 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:23:37,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:23:37,613 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:23:37,613 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:23:37,619 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:23:37,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37 WrapperNode [2023-08-04 07:23:37,620 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:23:37,621 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:23:37,621 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:23:37,621 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:23:37,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,639 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,659 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-04 07:23:37,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:23:37,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:23:37,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:23:37,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:23:37,668 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,671 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,671 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,686 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:23:37,687 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:23:37,687 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:23:37,687 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:23:37,688 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (1/1) ... [2023-08-04 07:23:37,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:23:37,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:37,714 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 07:23:37,716 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 07:23:37,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:23:37,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:23:37,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:23:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:23:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:23:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:23:37,742 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:23:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:23:37,742 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:23:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:23:37,742 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:23:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:23:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:23:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:23:37,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:23:37,744 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 07:23:37,879 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:23:37,881 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:23:38,061 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:23:38,067 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:23:38,067 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:23:38,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:23:38 BoogieIcfgContainer [2023-08-04 07:23:38,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:23:38,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:23:38,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:23:38,074 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:23:38,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:23:37" (1/3) ... [2023-08-04 07:23:38,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174b2050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:23:38, skipping insertion in model container [2023-08-04 07:23:38,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:23:37" (2/3) ... [2023-08-04 07:23:38,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174b2050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:23:38, skipping insertion in model container [2023-08-04 07:23:38,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:23:38" (3/3) ... [2023-08-04 07:23:38,076 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe028_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:23:38,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:23:38,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:23:38,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:23:38,094 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:23:38,138 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:23:38,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 105 transitions, 225 flow [2023-08-04 07:23:38,264 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 07:23:38,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:38,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 412 events. 30/412 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1834 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-04 07:23:38,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 105 transitions, 225 flow [2023-08-04 07:23:38,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 90 transitions, 189 flow [2023-08-04 07:23:38,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:23:38,293 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 90 transitions, 189 flow [2023-08-04 07:23:38,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 90 transitions, 189 flow [2023-08-04 07:23:38,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 90 transitions, 189 flow [2023-08-04 07:23:38,339 INFO L124 PetriNetUnfolderBase]: 22/309 cut-off events. [2023-08-04 07:23:38,340 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:38,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 309 events. 22/309 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1232 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 187. Up to 16 conditions per place. [2023-08-04 07:23:38,344 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-04 07:23:40,137 INFO L134 LiptonReduction]: Checked pairs total: 2446 [2023-08-04 07:23:40,138 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 07:23:40,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:23:40,171 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;@7cd7c69c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:23:40,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:23:40,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:23:40,177 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-08-04 07:23:40,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:23:40,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:40,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 351706777, now seen corresponding path program 1 times [2023-08-04 07:23:40,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672839454] [2023-08-04 07:23:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:40,480 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 07:23:40,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:40,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672839454] [2023-08-04 07:23:40,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672839454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:40,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:23:40,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:23:40,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815208594] [2023-08-04 07:23:40,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:40,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:40,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:40,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:40,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:23:40,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 179 [2023-08-04 07:23:40,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 07:23:40,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:40,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 179 [2023-08-04 07:23:40,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:40,649 INFO L124 PetriNetUnfolderBase]: 400/733 cut-off events. [2023-08-04 07:23:40,650 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 07:23:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 733 events. 400/733 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3491 event pairs, 222 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1429. Up to 668 conditions per place. [2023-08-04 07:23:40,656 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 20 selfloop transitions, 2 changer transitions 1/25 dead transitions. [2023-08-04 07:23:40,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 07:23:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:40,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 300 transitions. [2023-08-04 07:23:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5586592178770949 [2023-08-04 07:23:40,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 300 transitions. [2023-08-04 07:23:40,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 300 transitions. [2023-08-04 07:23:40,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:40,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 300 transitions. [2023-08-04 07:23:40,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 07:23:40,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:40,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:40,683 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 53 flow. Second operand 3 states and 300 transitions. [2023-08-04 07:23:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 07:23:40,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:23:40,687 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 61 flow [2023-08-04 07:23:40,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:23:40,691 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 07:23:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 61 flow [2023-08-04 07:23:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 07:23:40,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:23:40,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:40,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:40,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1311044647, now seen corresponding path program 1 times [2023-08-04 07:23:40,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062984970] [2023-08-04 07:23:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:40,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:40,765 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 07:23:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:40,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062984970] [2023-08-04 07:23:40,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062984970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:40,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930411188] [2023-08-04 07:23:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:40,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:40,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:40,770 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 07:23:40,772 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 07:23:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:40,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:23:40,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:40,866 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 07:23:40,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:23:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930411188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:40,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:23:40,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:23:40,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827018993] [2023-08-04 07:23:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:40,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:40,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:40,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 179 [2023-08-04 07:23:40,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:23:40,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:40,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 179 [2023-08-04 07:23:40,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:40,977 INFO L124 PetriNetUnfolderBase]: 338/599 cut-off events. [2023-08-04 07:23:40,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:23:40,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1195 conditions, 599 events. 338/599 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2579 event pairs, 202 based on Foata normal form. 0/553 useless extension candidates. Maximal degree in co-relation 1179. Up to 529 conditions per place. [2023-08-04 07:23:40,982 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 22 selfloop transitions, 2 changer transitions 1/27 dead transitions. [2023-08-04 07:23:40,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 121 flow [2023-08-04 07:23:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:40,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:40,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-08-04 07:23:40,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5623836126629422 [2023-08-04 07:23:40,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-08-04 07:23:40,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-08-04 07:23:40,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:40,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-08-04 07:23:40,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 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 07:23:40,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:40,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:40,990 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 61 flow. Second operand 3 states and 302 transitions. [2023-08-04 07:23:40,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 121 flow [2023-08-04 07:23:40,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:23:40,992 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 65 flow [2023-08-04 07:23:40,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-04 07:23:40,992 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-08-04 07:23:40,993 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 65 flow [2023-08-04 07:23:40,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 07:23:40,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:40,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:41,009 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 07:23:41,199 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 07:23:41,199 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:41,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash 867914047, now seen corresponding path program 1 times [2023-08-04 07:23:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:41,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181701020] [2023-08-04 07:23:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:41,293 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 07:23:41,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:41,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181701020] [2023-08-04 07:23:41,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181701020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:41,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276759380] [2023-08-04 07:23:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:41,303 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 07:23:41,310 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 07:23:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:41,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:23:41,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:41,394 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 07:23:41,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:23:41,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276759380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:41,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:23:41,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:23:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908137796] [2023-08-04 07:23:41,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:41,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:41,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 179 [2023-08-04 07:23:41,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:23:41,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:41,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 179 [2023-08-04 07:23:41,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:41,487 INFO L124 PetriNetUnfolderBase]: 314/523 cut-off events. [2023-08-04 07:23:41,487 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:23:41,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 523 events. 314/523 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2040 event pairs, 209 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1088. Up to 407 conditions per place. [2023-08-04 07:23:41,490 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 24 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 07:23:41,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 133 flow [2023-08-04 07:23:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-04 07:23:41,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661080074487895 [2023-08-04 07:23:41,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-04 07:23:41,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-04 07:23:41,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:41,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-04 07:23:41,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 07:23:41,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:41,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 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 07:23:41,497 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 65 flow. Second operand 3 states and 304 transitions. [2023-08-04 07:23:41,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 133 flow [2023-08-04 07:23:41,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:23:41,499 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 69 flow [2023-08-04 07:23:41,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-04 07:23:41,500 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-04 07:23:41,500 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 69 flow [2023-08-04 07:23:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:23:41,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:41,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:41,506 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 07:23:41,706 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 07:23:41,706 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:41,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:41,707 INFO L85 PathProgramCache]: Analyzing trace with hash 327020895, now seen corresponding path program 1 times [2023-08-04 07:23:41,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:41,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329673846] [2023-08-04 07:23:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:41,797 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 07:23:41,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:41,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329673846] [2023-08-04 07:23:41,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329673846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:41,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679720920] [2023-08-04 07:23:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:41,800 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 07:23:41,823 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 07:23:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:41,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:23:41,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:41,916 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 07:23:41,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:23:41,939 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 07:23:41,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679720920] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:23:41,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:23:41,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:23:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794257224] [2023-08-04 07:23:41,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:23:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:23:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:23:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:41,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 179 [2023-08-04 07:23:41,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:23:41,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:41,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 179 [2023-08-04 07:23:41,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:41,976 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:23:41,978 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:41,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:23:41,981 INFO L140 encePairwiseOnDemand]: 176/179 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:23:41,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:23:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:23:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:23:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2023-08-04 07:23:41,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223463687150838 [2023-08-04 07:23:41,983 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2023-08-04 07:23:41,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2023-08-04 07:23:41,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:41,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2023-08-04 07:23:41,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 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 07:23:41,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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 07:23:41,987 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 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 07:23:41,987 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 69 flow. Second operand 4 states and 374 transitions. [2023-08-04 07:23:41,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:23:41,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:23:41,988 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:23:41,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 07:23:41,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -11 predicate places. [2023-08-04 07:23:41,990 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:23:41,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:23:41,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:23:42,006 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 07:23:42,206 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 07:23:42,206 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:23:42,208 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:23:42,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 105 transitions, 225 flow [2023-08-04 07:23:42,260 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 07:23:42,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:42,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 412 events. 30/412 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1834 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 241. Up to 16 conditions per place. [2023-08-04 07:23:42,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 105 transitions, 225 flow [2023-08-04 07:23:42,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 77 transitions, 169 flow [2023-08-04 07:23:42,262 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:23:42,262 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 77 transitions, 169 flow [2023-08-04 07:23:42,262 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 77 transitions, 169 flow [2023-08-04 07:23:42,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 77 transitions, 169 flow [2023-08-04 07:23:42,274 INFO L124 PetriNetUnfolderBase]: 6/188 cut-off events. [2023-08-04 07:23:42,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:42,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 188 events. 6/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 586 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2023-08-04 07:23:42,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 1042 [2023-08-04 07:23:43,793 INFO L134 LiptonReduction]: Checked pairs total: 1839 [2023-08-04 07:23:43,793 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 07:23:43,794 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:23:43,795 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;@7cd7c69c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:23:43,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:23:43,797 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:23:43,797 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 07:23:43,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:43,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:43,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:23:43,797 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:23:43,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:43,798 INFO L85 PathProgramCache]: Analyzing trace with hash -203976338, now seen corresponding path program 1 times [2023-08-04 07:23:43,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:43,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849706540] [2023-08-04 07:23:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:43,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:43,822 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 07:23:43,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:43,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849706540] [2023-08-04 07:23:43,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849706540] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:43,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:23:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:23:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315875645] [2023-08-04 07:23:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:43,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:23:43,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 165 [2023-08-04 07:23:43,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 07:23:43,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:43,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 165 [2023-08-04 07:23:43,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:43,877 INFO L124 PetriNetUnfolderBase]: 160/313 cut-off events. [2023-08-04 07:23:43,877 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 07:23:43,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 313 events. 160/313 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1317 event pairs, 78 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 631. Up to 284 conditions per place. [2023-08-04 07:23:43,879 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 18 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-04 07:23:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 07:23:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-04 07:23:43,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-08-04 07:23:43,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-04 07:23:43,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-04 07:23:43,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:43,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-04 07:23:43,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 07:23:43,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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 07:23:43,884 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 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 07:23:43,884 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 59 flow. Second operand 3 states and 297 transitions. [2023-08-04 07:23:43,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 07:23:43,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:23:43,885 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 67 flow [2023-08-04 07:23:43,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:23:43,886 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 07:23:43,886 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 67 flow [2023-08-04 07:23:43,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 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 07:23:43,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:43,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:23:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:23:43,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:23:43,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash -212493158, now seen corresponding path program 1 times [2023-08-04 07:23:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329397202] [2023-08-04 07:23:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:23:43,900 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:23:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:23:43,919 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:23:43,919 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:23:43,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:23:43,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:23:43,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:23:43,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:23:43,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:23:43,921 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:23:43,921 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:23:43,921 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:23:43,941 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:23:43,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 125 transitions, 286 flow [2023-08-04 07:23:44,038 INFO L124 PetriNetUnfolderBase]: 93/1298 cut-off events. [2023-08-04 07:23:44,038 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:23:44,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 1298 events. 93/1298 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8843 event pairs, 0 based on Foata normal form. 0/1139 useless extension candidates. Maximal degree in co-relation 939. Up to 54 conditions per place. [2023-08-04 07:23:44,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 125 transitions, 286 flow [2023-08-04 07:23:44,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 110 transitions, 244 flow [2023-08-04 07:23:44,046 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:23:44,046 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 110 transitions, 244 flow [2023-08-04 07:23:44,046 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 110 transitions, 244 flow [2023-08-04 07:23:44,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 110 transitions, 244 flow [2023-08-04 07:23:44,110 INFO L124 PetriNetUnfolderBase]: 66/961 cut-off events. [2023-08-04 07:23:44,110 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:23:44,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 961 events. 66/961 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5972 event pairs, 0 based on Foata normal form. 0/856 useless extension candidates. Maximal degree in co-relation 711. Up to 54 conditions per place. [2023-08-04 07:23:44,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 3716 [2023-08-04 07:23:45,811 INFO L134 LiptonReduction]: Checked pairs total: 6802 [2023-08-04 07:23:45,811 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-04 07:23:45,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:23:45,813 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;@7cd7c69c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:23:45,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:23:45,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:23:45,815 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 07:23:45,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:23:45,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:45,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:23:45,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:45,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash 623745175, now seen corresponding path program 1 times [2023-08-04 07:23:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525696663] [2023-08-04 07:23:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:45,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:45,882 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 07:23:45,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:45,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525696663] [2023-08-04 07:23:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525696663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:45,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:23:45,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:23:45,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611507995] [2023-08-04 07:23:45,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:45,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:45,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:23:45,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 205 [2023-08-04 07:23:45,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 07:23:45,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:45,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 205 [2023-08-04 07:23:45,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:49,556 INFO L124 PetriNetUnfolderBase]: 33046/46805 cut-off events. [2023-08-04 07:23:49,556 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 07:23:49,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92196 conditions, 46805 events. 33046/46805 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1496. Compared 310259 event pairs, 26064 based on Foata normal form. 0/44563 useless extension candidates. Maximal degree in co-relation 26071. Up to 43520 conditions per place. [2023-08-04 07:23:49,843 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 07:23:49,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2023-08-04 07:23:49,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:49,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-04 07:23:49,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869918699186992 [2023-08-04 07:23:49,845 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-04 07:23:49,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-04 07:23:49,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:49,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-04 07:23:49,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 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 07:23:49,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:49,848 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:49,849 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 96 flow. Second operand 3 states and 361 transitions. [2023-08-04 07:23:49,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2023-08-04 07:23:49,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:23:49,851 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 108 flow [2023-08-04 07:23:49,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 07:23:49,853 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 07:23:49,853 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 108 flow [2023-08-04 07:23:49,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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 07:23:49,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:49,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:23:49,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:49,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -437835391, now seen corresponding path program 1 times [2023-08-04 07:23:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:49,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468189044] [2023-08-04 07:23:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:49,905 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 07:23:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468189044] [2023-08-04 07:23:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468189044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630987895] [2023-08-04 07:23:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:49,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:49,913 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 07:23:49,916 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 07:23:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:49,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:23:49,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:49,988 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 07:23:49,988 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:23:49,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630987895] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:49,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:23:49,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:23:49,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41381859] [2023-08-04 07:23:49,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:49,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:49,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:49,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:49,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:49,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 205 [2023-08-04 07:23:50,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 07:23:50,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:50,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 205 [2023-08-04 07:23:50,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:52,507 INFO L124 PetriNetUnfolderBase]: 31406/44609 cut-off events. [2023-08-04 07:23:52,507 INFO L125 PetriNetUnfolderBase]: For 1215/1215 co-relation queries the response was YES. [2023-08-04 07:23:52,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87490 conditions, 44609 events. 31406/44609 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 294629 event pairs, 24928 based on Foata normal form. 0/42556 useless extension candidates. Maximal degree in co-relation 87453. Up to 40987 conditions per place. [2023-08-04 07:23:52,744 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 07:23:52,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 200 flow [2023-08-04 07:23:52,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-04 07:23:52,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2023-08-04 07:23:52,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-04 07:23:52,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-04 07:23:52,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:52,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-04 07:23:52,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 07:23:52,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:52,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:52,748 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 108 flow. Second operand 3 states and 365 transitions. [2023-08-04 07:23:52,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 200 flow [2023-08-04 07:23:52,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:23:52,749 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 118 flow [2023-08-04 07:23:52,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-04 07:23:52,750 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-04 07:23:52,750 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 118 flow [2023-08-04 07:23:52,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 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 07:23:52,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:52,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:52,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:23:52,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:52,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:52,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2043088357, now seen corresponding path program 1 times [2023-08-04 07:23:52,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:52,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020900045] [2023-08-04 07:23:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:53,018 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 07:23:53,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020900045] [2023-08-04 07:23:53,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020900045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:53,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717284078] [2023-08-04 07:23:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:53,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:53,020 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 07:23:53,024 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 07:23:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:53,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:23:53,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:53,104 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 07:23:53,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:23:53,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717284078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:23:53,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:23:53,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:23:53,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915236102] [2023-08-04 07:23:53,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:23:53,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:23:53,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:23:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:53,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 205 [2023-08-04 07:23:53,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 07:23:53,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:53,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 205 [2023-08-04 07:23:53,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:55,771 INFO L124 PetriNetUnfolderBase]: 30734/43106 cut-off events. [2023-08-04 07:23:55,771 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 07:23:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85361 conditions, 43106 events. 30734/43106 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1508. Compared 279179 event pairs, 23582 based on Foata normal form. 0/41374 useless extension candidates. Maximal degree in co-relation 24260. Up to 37757 conditions per place. [2023-08-04 07:23:56,005 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 41 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 07:23:56,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 228 flow [2023-08-04 07:23:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:23:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:23:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 07:23:56,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2023-08-04 07:23:56,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 07:23:56,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 07:23:56,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:56,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 07:23:56,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 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 07:23:56,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:56,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:23:56,013 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 118 flow. Second operand 3 states and 369 transitions. [2023-08-04 07:23:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 228 flow [2023-08-04 07:23:56,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:23:56,020 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 128 flow [2023-08-04 07:23:56,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-04 07:23:56,022 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-04 07:23:56,022 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 128 flow [2023-08-04 07:23:56,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 07:23:56,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:56,023 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 07:23:56,029 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 07:23:56,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:56,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:56,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:56,228 INFO L85 PathProgramCache]: Analyzing trace with hash 48640353, now seen corresponding path program 1 times [2023-08-04 07:23:56,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:56,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388345854] [2023-08-04 07:23:56,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:56,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:56,303 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 07:23:56,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388345854] [2023-08-04 07:23:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388345854] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:56,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182049522] [2023-08-04 07:23:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:56,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:56,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:56,305 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 07:23:56,332 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 07:23:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:56,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:23:56,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:56,408 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 07:23:56,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:23:56,431 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 07:23:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182049522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:23:56,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:23:56,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:23:56,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058642846] [2023-08-04 07:23:56,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:23:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:23:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:23:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:56,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 07:23:56,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 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 07:23:56,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:56,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 07:23:56,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:23:58,456 INFO L124 PetriNetUnfolderBase]: 24232/33704 cut-off events. [2023-08-04 07:23:58,456 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2023-08-04 07:23:58,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 33704 events. 24232/33704 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 207069 event pairs, 14820 based on Foata normal form. 3/33679 useless extension candidates. Maximal degree in co-relation 24747. Up to 31258 conditions per place. [2023-08-04 07:23:58,703 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 36 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-08-04 07:23:58,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 07:23:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:23:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:23:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-04 07:23:58,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574390243902439 [2023-08-04 07:23:58,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-04 07:23:58,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-04 07:23:58,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:23:58,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-04 07:23:58,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 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 07:23:58,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:23:58,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:23:58,711 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 128 flow. Second operand 4 states and 471 transitions. [2023-08-04 07:23:58,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 07:23:58,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:23:58,716 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 140 flow [2023-08-04 07:23:58,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 07:23:58,718 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-04 07:23:58,718 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 140 flow [2023-08-04 07:23:58,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.6) internal successors, (558), 5 states have internal predecessors, (558), 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 07:23:58,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:23:58,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:23:58,726 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 07:23:58,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:58,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:23:58,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:23:58,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2023285364, now seen corresponding path program 1 times [2023-08-04 07:23:58,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:23:58,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915042701] [2023-08-04 07:23:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:58,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:23:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:58,979 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 07:23:58,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:23:58,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915042701] [2023-08-04 07:23:58,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915042701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:23:58,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218020887] [2023-08-04 07:23:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:23:58,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:23:58,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:23:58,981 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 07:23:58,983 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 07:23:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:23:59,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:23:59,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:23:59,074 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 07:23:59,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:23:59,090 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 07:23:59,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218020887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:23:59,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:23:59,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:23:59,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609872664] [2023-08-04 07:23:59,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:23:59,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:23:59,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:23:59,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:23:59,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:23:59,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 07:23:59,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 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 07:23:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:23:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 07:23:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:00,912 INFO L124 PetriNetUnfolderBase]: 19198/26422 cut-off events. [2023-08-04 07:24:00,912 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 07:24:00,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54308 conditions, 26422 events. 19198/26422 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 153895 event pairs, 11902 based on Foata normal form. 27/26448 useless extension candidates. Maximal degree in co-relation 19274. Up to 23785 conditions per place. [2023-08-04 07:24:01,037 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 44 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 07:24:01,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 268 flow [2023-08-04 07:24:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:24:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:24:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 07:24:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841463414634146 [2023-08-04 07:24:01,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 07:24:01,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 07:24:01,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:01,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 07:24:01,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 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 07:24:01,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:01,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:01,043 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 140 flow. Second operand 4 states and 479 transitions. [2023-08-04 07:24:01,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 268 flow [2023-08-04 07:24:01,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 261 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:24:01,051 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 147 flow [2023-08-04 07:24:01,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2023-08-04 07:24:01,052 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-04 07:24:01,052 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 147 flow [2023-08-04 07:24:01,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 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 07:24:01,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:01,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:24:01,063 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 07:24:01,258 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 07:24:01,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:01,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:01,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1561522235, now seen corresponding path program 1 times [2023-08-04 07:24:01,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:01,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915962502] [2023-08-04 07:24:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:01,329 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 07:24:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915962502] [2023-08-04 07:24:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915962502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:24:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935631595] [2023-08-04 07:24:01,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:01,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:24:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:24:01,331 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 07:24:01,355 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 07:24:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:01,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:24:01,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:24:01,427 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 07:24:01,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:24:01,440 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 07:24:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935631595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:24:01,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:24:01,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:24:01,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473357703] [2023-08-04 07:24:01,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:24:01,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:24:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:24:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:24:01,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2023-08-04 07:24:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 07:24:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:01,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2023-08-04 07:24:01,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:02,792 INFO L124 PetriNetUnfolderBase]: 17362/23128 cut-off events. [2023-08-04 07:24:02,793 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 07:24:02,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48673 conditions, 23128 events. 17362/23128 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 124279 event pairs, 6886 based on Foata normal form. 243/23370 useless extension candidates. Maximal degree in co-relation 17270. Up to 11794 conditions per place. [2023-08-04 07:24:02,903 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 52 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-08-04 07:24:02,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 307 flow [2023-08-04 07:24:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:24:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:24:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 07:24:02,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2023-08-04 07:24:02,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 07:24:02,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 07:24:02,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:02,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 07:24:02,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 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 07:24:02,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:02,922 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:02,922 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 147 flow. Second operand 4 states and 487 transitions. [2023-08-04 07:24:02,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 307 flow [2023-08-04 07:24:02,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 300 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:24:02,927 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 154 flow [2023-08-04 07:24:02,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-04 07:24:02,927 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 07:24:02,927 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 154 flow [2023-08-04 07:24:02,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.0) internal successors, (560), 5 states have internal predecessors, (560), 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 07:24:02,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:02,928 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] [2023-08-04 07:24:02,948 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 07:24:03,133 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 07:24:03,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:03,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:03,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1202553228, now seen corresponding path program 1 times [2023-08-04 07:24:03,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:03,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51424434] [2023-08-04 07:24:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:03,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:03,328 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 07:24:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51424434] [2023-08-04 07:24:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51424434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:24:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:24:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:24:03,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127852603] [2023-08-04 07:24:03,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:24:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:24:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:24:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:24:03,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2023-08-04 07:24:03,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 07:24:03,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:03,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2023-08-04 07:24:03,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:06,699 INFO L124 PetriNetUnfolderBase]: 45682/57479 cut-off events. [2023-08-04 07:24:06,699 INFO L125 PetriNetUnfolderBase]: For 28692/28692 co-relation queries the response was YES. [2023-08-04 07:24:06,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131597 conditions, 57479 events. 45682/57479 cut-off events. For 28692/28692 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 275815 event pairs, 14230 based on Foata normal form. 36/57492 useless extension candidates. Maximal degree in co-relation 97255. Up to 56085 conditions per place. [2023-08-04 07:24:07,005 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 58 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-08-04 07:24:07,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 404 flow [2023-08-04 07:24:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:24:07,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:24:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 07:24:07,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2023-08-04 07:24:07,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 07:24:07,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 07:24:07,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:07,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 07:24:07,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:24:07,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:24:07,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 07:24:07,010 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 154 flow. Second operand 3 states and 370 transitions. [2023-08-04 07:24:07,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 404 flow [2023-08-04 07:24:07,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:24:07,033 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 180 flow [2023-08-04 07:24:07,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 07:24:07,034 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 07:24:07,034 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 180 flow [2023-08-04 07:24:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 07:24:07,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:07,034 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] [2023-08-04 07:24:07,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:24:07,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:07,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1375556585, now seen corresponding path program 1 times [2023-08-04 07:24:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:07,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817821829] [2023-08-04 07:24:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:07,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:07,196 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 07:24:07,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:07,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817821829] [2023-08-04 07:24:07,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817821829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:24:07,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:24:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:24:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194878404] [2023-08-04 07:24:07,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:24:07,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:24:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:24:07,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:24:07,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2023-08-04 07:24:07,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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 07:24:07,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:07,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2023-08-04 07:24:07,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:09,872 INFO L124 PetriNetUnfolderBase]: 33112/44910 cut-off events. [2023-08-04 07:24:09,872 INFO L125 PetriNetUnfolderBase]: For 22234/22234 co-relation queries the response was YES. [2023-08-04 07:24:10,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105190 conditions, 44910 events. 33112/44910 cut-off events. For 22234/22234 co-relation queries the response was YES. Maximal size of possible extension queue 2068. Compared 284735 event pairs, 3326 based on Foata normal form. 1233/45234 useless extension candidates. Maximal degree in co-relation 52254. Up to 21857 conditions per place. [2023-08-04 07:24:10,146 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 67 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-08-04 07:24:10,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 479 flow [2023-08-04 07:24:10,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:24:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:24:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2023-08-04 07:24:10,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2023-08-04 07:24:10,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2023-08-04 07:24:10,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2023-08-04 07:24:10,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:10,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2023-08-04 07:24:10,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 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 07:24:10,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:10,151 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 205.0) internal successors, (1025), 5 states have internal predecessors, (1025), 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 07:24:10,151 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 180 flow. Second operand 4 states and 494 transitions. [2023-08-04 07:24:10,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 479 flow [2023-08-04 07:24:10,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:24:10,164 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 234 flow [2023-08-04 07:24:10,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2023-08-04 07:24:10,166 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2023-08-04 07:24:10,166 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 234 flow [2023-08-04 07:24:10,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 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 07:24:10,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:10,166 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 07:24:10,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 07:24:10,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:10,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash 307392850, now seen corresponding path program 1 times [2023-08-04 07:24:10,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:10,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382373976] [2023-08-04 07:24:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:10,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:10,290 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 07:24:10,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:10,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382373976] [2023-08-04 07:24:10,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382373976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:24:10,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:24:10,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:24:10,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897810285] [2023-08-04 07:24:10,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:24:10,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:24:10,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:10,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:24:10,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:24:10,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2023-08-04 07:24:10,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 234 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:24:10,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:10,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2023-08-04 07:24:10,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:13,881 INFO L124 PetriNetUnfolderBase]: 38897/51397 cut-off events. [2023-08-04 07:24:13,881 INFO L125 PetriNetUnfolderBase]: For 53312/53312 co-relation queries the response was YES. [2023-08-04 07:24:14,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141914 conditions, 51397 events. 38897/51397 cut-off events. For 53312/53312 co-relation queries the response was YES. Maximal size of possible extension queue 2526. Compared 300003 event pairs, 8191 based on Foata normal form. 1024/51085 useless extension candidates. Maximal degree in co-relation 103889. Up to 39352 conditions per place. [2023-08-04 07:24:14,162 INFO L140 encePairwiseOnDemand]: 196/205 looper letters, 99 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2023-08-04 07:24:14,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 122 transitions, 797 flow [2023-08-04 07:24:14,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:24:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:24:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-04 07:24:14,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765853658536585 [2023-08-04 07:24:14,164 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-04 07:24:14,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-04 07:24:14,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:14,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-04 07:24:14,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 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 07:24:14,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 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 07:24:14,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 205.0) internal successors, (1230), 6 states have internal predecessors, (1230), 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 07:24:14,168 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 234 flow. Second operand 5 states and 591 transitions. [2023-08-04 07:24:14,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 122 transitions, 797 flow [2023-08-04 07:24:14,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 780 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:24:14,185 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 338 flow [2023-08-04 07:24:14,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=338, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2023-08-04 07:24:14,185 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 25 predicate places. [2023-08-04 07:24:14,185 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 338 flow [2023-08-04 07:24:14,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:24:14,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:14,186 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 07:24:14,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:24:14,186 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:14,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash 731949200, now seen corresponding path program 1 times [2023-08-04 07:24:14,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:14,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86028273] [2023-08-04 07:24:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:24:14,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:14,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86028273] [2023-08-04 07:24:14,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86028273] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:24:14,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009471132] [2023-08-04 07:24:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:14,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:24:14,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:24:14,317 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 07:24:14,319 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 07:24:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:14,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 07:24:14,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:24:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:24:14,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:24:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:24:14,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009471132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:24:14,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:24:14,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-04 07:24:14,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40948429] [2023-08-04 07:24:14,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:24:14,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 07:24:14,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:14,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 07:24:14,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-04 07:24:15,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-08-04 07:24:15,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 338 flow. Second operand has 15 states, 15 states have (on average 94.26666666666667) internal successors, (1414), 15 states have internal predecessors, (1414), 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 07:24:15,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:15,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-08-04 07:24:15,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:28,107 INFO L124 PetriNetUnfolderBase]: 134604/174781 cut-off events. [2023-08-04 07:24:28,108 INFO L125 PetriNetUnfolderBase]: For 276130/276130 co-relation queries the response was YES. [2023-08-04 07:24:28,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 597106 conditions, 174781 events. 134604/174781 cut-off events. For 276130/276130 co-relation queries the response was YES. Maximal size of possible extension queue 6356. Compared 1069844 event pairs, 2408 based on Foata normal form. 4541/179309 useless extension candidates. Maximal degree in co-relation 475688. Up to 71192 conditions per place. [2023-08-04 07:24:29,097 INFO L140 encePairwiseOnDemand]: 188/205 looper letters, 283 selfloop transitions, 199 changer transitions 234/719 dead transitions. [2023-08-04 07:24:29,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 719 transitions, 4985 flow [2023-08-04 07:24:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-04 07:24:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-04 07:24:29,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3583 transitions. [2023-08-04 07:24:29,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296378418329638 [2023-08-04 07:24:29,106 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3583 transitions. [2023-08-04 07:24:29,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3583 transitions. [2023-08-04 07:24:29,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:29,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3583 transitions. [2023-08-04 07:24:29,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 108.57575757575758) internal successors, (3583), 33 states have internal predecessors, (3583), 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 07:24:29,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 205.0) internal successors, (6970), 34 states have internal predecessors, (6970), 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 07:24:29,126 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 205.0) internal successors, (6970), 34 states have internal predecessors, (6970), 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 07:24:29,126 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 338 flow. Second operand 33 states and 3583 transitions. [2023-08-04 07:24:29,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 719 transitions, 4985 flow [2023-08-04 07:24:29,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 719 transitions, 4968 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:24:29,814 INFO L231 Difference]: Finished difference. Result has 124 places, 269 transitions, 2088 flow [2023-08-04 07:24:29,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2088, PETRI_PLACES=124, PETRI_TRANSITIONS=269} [2023-08-04 07:24:29,815 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 75 predicate places. [2023-08-04 07:24:29,815 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 269 transitions, 2088 flow [2023-08-04 07:24:29,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 94.26666666666667) internal successors, (1414), 15 states have internal predecessors, (1414), 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 07:24:29,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:24:29,815 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 07:24:29,821 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 07:24:30,017 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,SelfDestructingSolverStorable15 [2023-08-04 07:24:30,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:24:30,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:24:30,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1982910799, now seen corresponding path program 1 times [2023-08-04 07:24:30,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:24:30,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722289155] [2023-08-04 07:24:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:30,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:24:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:24:30,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:24:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722289155] [2023-08-04 07:24:30,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722289155] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:24:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701382523] [2023-08-04 07:24:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:24:30,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:24:30,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:24:30,198 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 07:24:30,201 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 07:24:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:24:30,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-04 07:24:30,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:24:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:24:30,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:24:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:24:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701382523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:24:30,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:24:30,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2023-08-04 07:24:30,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915699639] [2023-08-04 07:24:30,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:24:30,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 07:24:30,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:24:30,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 07:24:30,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-04 07:24:30,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 205 [2023-08-04 07:24:30,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 269 transitions, 2088 flow. Second operand has 18 states, 18 states have (on average 93.77777777777777) internal successors, (1688), 18 states have internal predecessors, (1688), 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 07:24:30,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:24:30,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 205 [2023-08-04 07:24:30,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:24:57,318 INFO L124 PetriNetUnfolderBase]: 191049/249592 cut-off events. [2023-08-04 07:24:57,319 INFO L125 PetriNetUnfolderBase]: For 1828201/1828201 co-relation queries the response was YES. [2023-08-04 07:24:58,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1211124 conditions, 249592 events. 191049/249592 cut-off events. For 1828201/1828201 co-relation queries the response was YES. Maximal size of possible extension queue 9719. Compared 1637278 event pairs, 1304 based on Foata normal form. 3197/252776 useless extension candidates. Maximal degree in co-relation 1158527. Up to 102955 conditions per place. [2023-08-04 07:24:59,719 INFO L140 encePairwiseOnDemand]: 188/205 looper letters, 684 selfloop transitions, 747 changer transitions 402/1836 dead transitions. [2023-08-04 07:24:59,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1836 transitions, 17566 flow [2023-08-04 07:24:59,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-04 07:24:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-04 07:24:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 5964 transitions. [2023-08-04 07:24:59,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387533875338754 [2023-08-04 07:24:59,731 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 5964 transitions. [2023-08-04 07:24:59,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 5964 transitions. [2023-08-04 07:24:59,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:24:59,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 5964 transitions. [2023-08-04 07:24:59,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 110.44444444444444) internal successors, (5964), 54 states have internal predecessors, (5964), 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 07:24:59,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 205.0) internal successors, (11275), 55 states have internal predecessors, (11275), 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 07:24:59,778 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 205.0) internal successors, (11275), 55 states have internal predecessors, (11275), 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 07:24:59,778 INFO L175 Difference]: Start difference. First operand has 124 places, 269 transitions, 2088 flow. Second operand 54 states and 5964 transitions. [2023-08-04 07:24:59,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1836 transitions, 17566 flow [2023-08-04 07:28:02,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 1836 transitions, 14774 flow, removed 1357 selfloop flow, removed 13 redundant places. [2023-08-04 07:28:02,748 INFO L231 Difference]: Finished difference. Result has 173 places, 937 transitions, 8502 flow [2023-08-04 07:28:02,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=8502, PETRI_PLACES=173, PETRI_TRANSITIONS=937} [2023-08-04 07:28:02,749 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 124 predicate places. [2023-08-04 07:28:02,749 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 937 transitions, 8502 flow [2023-08-04 07:28:02,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.77777777777777) internal successors, (1688), 18 states have internal predecessors, (1688), 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 07:28:02,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:28:02,750 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, 1, 1, 1] [2023-08-04 07:28:02,757 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 07:28:02,956 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,SelfDestructingSolverStorable16 [2023-08-04 07:28:02,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:28:02,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:28:02,956 INFO L85 PathProgramCache]: Analyzing trace with hash 150064246, now seen corresponding path program 1 times [2023-08-04 07:28:02,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:28:02,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586531621] [2023-08-04 07:28:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:28:02,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:28:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:28:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 07:28:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:28:03,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586531621] [2023-08-04 07:28:03,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586531621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:28:03,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:28:03,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 07:28:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452322308] [2023-08-04 07:28:03,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:28:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:28:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:28:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:28:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:28:03,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 205 [2023-08-04 07:28:03,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 937 transitions, 8502 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 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 07:28:03,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:28:03,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 205 [2023-08-04 07:28:03,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand