/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_safe030_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:24:59,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:24:59,624 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:24:59,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:24:59,631 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:24:59,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:24:59,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:24:59,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:24:59,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:24:59,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:24:59,672 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:24:59,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:24:59,673 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:24:59,674 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:24:59,675 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:24:59,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:24:59,675 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:24:59,675 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:24:59,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:24:59,676 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:24:59,676 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:24:59,676 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:24:59,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:24:59,677 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:24:59,678 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:24:59,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:24:59,679 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:24:59,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:24:59,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:24:59,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:24:59,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:24:59,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:24:59,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:24:59,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:24:59,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:24:59,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:24:59,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:24:59,682 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:24:59,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:24:59,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:24:59,682 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:24:59,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:24:59,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:24:59,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:24:59,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:24:59,930 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:24:59,933 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:24:59,935 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe030_tso_bound2.i [2023-08-04 07:25:01,069 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:25:01,362 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:25:01,362 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe030_tso_bound2.i [2023-08-04 07:25:01,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625c036cf/3a173698f7a449b48bf640cbb1e31c17/FLAGcc5492c48 [2023-08-04 07:25:01,402 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625c036cf/3a173698f7a449b48bf640cbb1e31c17 [2023-08-04 07:25:01,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:25:01,406 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:25:01,407 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:25:01,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:25:01,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:25:01,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,412 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c5d738c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01, skipping insertion in model container [2023-08-04 07:25:01,412 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,457 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:25:01,590 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_safe030_tso_bound2.i[945,958] [2023-08-04 07:25:01,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:25:01,734 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:25:01,747 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_safe030_tso_bound2.i[945,958] [2023-08-04 07:25:01,770 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:25:01,772 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:25:01,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:25:01,828 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:25:01,828 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:25:01,834 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:25:01,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01 WrapperNode [2023-08-04 07:25:01,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:25:01,835 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:25:01,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:25:01,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:25:01,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,871 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,896 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-08-04 07:25:01,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:25:01,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:25:01,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:25:01,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:25:01,905 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,908 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,918 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,927 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,929 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,930 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:25:01,933 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:25:01,933 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:25:01,933 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:25:01,934 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (1/1) ... [2023-08-04 07:25:01,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:25:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:01,961 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 07:25:01,966 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 07:25:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:25:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:25:01,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:25:01,995 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:25:01,995 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:25:01,995 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:25:01,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:25:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:25:01,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:25:01,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:25:01,997 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 07:25:02,119 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:25:02,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:25:02,274 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:25:02,281 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:25:02,281 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:25:02,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:25:02 BoogieIcfgContainer [2023-08-04 07:25:02,283 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:25:02,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:25:02,285 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:25:02,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:25:02,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:25:01" (1/3) ... [2023-08-04 07:25:02,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7201a4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:25:02, skipping insertion in model container [2023-08-04 07:25:02,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:25:01" (2/3) ... [2023-08-04 07:25:02,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7201a4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:25:02, skipping insertion in model container [2023-08-04 07:25:02,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:25:02" (3/3) ... [2023-08-04 07:25:02,290 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe030_tso_bound2.i [2023-08-04 07:25:02,296 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:25:02,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:25:02,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:25:02,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:25:02,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:25:02,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:25:02,502 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 07:25:02,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:02,509 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 1844 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 07:25:02,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:25:02,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 89 transitions, 187 flow [2023-08-04 07:25:02,516 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:25:02,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 89 transitions, 187 flow [2023-08-04 07:25:02,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 89 transitions, 187 flow [2023-08-04 07:25:02,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 89 transitions, 187 flow [2023-08-04 07:25:02,576 INFO L124 PetriNetUnfolderBase]: 22/309 cut-off events. [2023-08-04 07:25:02,577 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:02,578 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 1247 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 07:25:02,581 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-08-04 07:25:04,363 INFO L134 LiptonReduction]: Checked pairs total: 2848 [2023-08-04 07:25:04,363 INFO L136 LiptonReduction]: Total number of compositions: 74 [2023-08-04 07:25:04,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:25:04,387 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;@63376382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:25:04,388 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:25:04,392 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:25:04,393 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-04 07:25:04,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:04,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:04,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:25:04,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:04,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:04,399 INFO L85 PathProgramCache]: Analyzing trace with hash 350723821, now seen corresponding path program 1 times [2023-08-04 07:25:04,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:04,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830368363] [2023-08-04 07:25:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:04,603 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 07:25:04,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:04,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830368363] [2023-08-04 07:25:04,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830368363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:04,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:25:04,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:25:04,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575144901] [2023-08-04 07:25:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:04,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:04,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:25:04,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 178 [2023-08-04 07:25:04,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 07:25:04,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:04,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 178 [2023-08-04 07:25:04,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:04,747 INFO L124 PetriNetUnfolderBase]: 400/688 cut-off events. [2023-08-04 07:25:04,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:04,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 688 events. 400/688 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3494 event pairs, 222 based on Foata normal form. 0/610 useless extension candidates. Maximal degree in co-relation 1384. Up to 668 conditions per place. [2023-08-04 07:25:04,753 INFO L140 encePairwiseOnDemand]: 174/178 looper letters, 20 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 07:25:04,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 07:25:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:04,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-04 07:25:04,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580524344569289 [2023-08-04 07:25:04,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-04 07:25:04,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-04 07:25:04,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:04,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-04 07:25:04,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 07:25:04,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:04,777 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:04,778 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 57 flow. Second operand 3 states and 298 transitions. [2023-08-04 07:25:04,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 07:25:04,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:25:04,782 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 63 flow [2023-08-04 07:25:04,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 07:25:04,787 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 07:25:04,787 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 63 flow [2023-08-04 07:25:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 07:25:04,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:04,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:04,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:25:04,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:04,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:04,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1788956418, now seen corresponding path program 1 times [2023-08-04 07:25:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654340620] [2023-08-04 07:25:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:04,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:04,880 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 07:25:04,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:04,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654340620] [2023-08-04 07:25:04,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654340620] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:04,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453217591] [2023-08-04 07:25:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:04,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:04,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:04,884 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 07:25:04,895 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 07:25:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:04,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:25:04,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:04,992 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 07:25:04,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:25:04,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453217591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:04,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:25:04,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:25:04,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492011577] [2023-08-04 07:25:04,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:05,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 178 [2023-08-04 07:25:05,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 63 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 07:25:05,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:05,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 178 [2023-08-04 07:25:05,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:05,105 INFO L124 PetriNetUnfolderBase]: 338/566 cut-off events. [2023-08-04 07:25:05,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:25:05,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162 conditions, 566 events. 338/566 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2528 event pairs, 262 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 1146. Up to 529 conditions per place. [2023-08-04 07:25:05,112 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 22 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 07:25:05,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 123 flow [2023-08-04 07:25:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 07:25:05,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599250936329588 [2023-08-04 07:25:05,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 07:25:05,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 07:25:05,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:05,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 07:25:05,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 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 07:25:05,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:05,129 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:05,129 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 63 flow. Second operand 3 states and 299 transitions. [2023-08-04 07:25:05,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 123 flow [2023-08-04 07:25:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 119 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:25:05,131 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 67 flow [2023-08-04 07:25:05,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-04 07:25:05,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-04 07:25:05,132 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 67 flow [2023-08-04 07:25:05,133 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 07:25:05,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:05,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:05,141 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 07:25:05,339 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 07:25:05,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:05,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:05,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1207750942, now seen corresponding path program 1 times [2023-08-04 07:25:05,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:05,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98374227] [2023-08-04 07:25:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:05,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:05,463 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 07:25:05,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98374227] [2023-08-04 07:25:05,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98374227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:05,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379093592] [2023-08-04 07:25:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:05,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:05,471 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 07:25:05,485 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 07:25:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:05,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:25:05,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:05,561 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 07:25:05,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:25:05,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379093592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:05,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:25:05,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:25:05,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993911665] [2023-08-04 07:25:05,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:05,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:05,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:05,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:05,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 178 [2023-08-04 07:25:05,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 67 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 07:25:05,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:05,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 178 [2023-08-04 07:25:05,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:05,657 INFO L124 PetriNetUnfolderBase]: 314/532 cut-off events. [2023-08-04 07:25:05,658 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:25:05,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 532 events. 314/532 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2324 event pairs, 182 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 1097. Up to 407 conditions per place. [2023-08-04 07:25:05,660 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 24 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 07:25:05,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 135 flow [2023-08-04 07:25:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-08-04 07:25:05,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636704119850188 [2023-08-04 07:25:05,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-08-04 07:25:05,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-08-04 07:25:05,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:05,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-08-04 07:25:05,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 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 07:25:05,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:05,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 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 07:25:05,665 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 67 flow. Second operand 3 states and 301 transitions. [2023-08-04 07:25:05,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 135 flow [2023-08-04 07:25:05,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:25:05,666 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 71 flow [2023-08-04 07:25:05,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=35, PETRI_TRANSITIONS=23} [2023-08-04 07:25:05,667 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-04 07:25:05,667 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 71 flow [2023-08-04 07:25:05,667 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 07:25:05,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:05,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:05,676 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 07:25:05,872 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 07:25:05,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:05,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1152644410, now seen corresponding path program 1 times [2023-08-04 07:25:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:05,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637849413] [2023-08-04 07:25:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:05,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:05,943 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 07:25:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:05,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637849413] [2023-08-04 07:25:05,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637849413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:05,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457833525] [2023-08-04 07:25:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:05,946 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 07:25:05,948 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 07:25:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:06,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:25:06,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:06,040 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 07:25:06,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:25:06,055 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 07:25:06,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457833525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:25:06,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:25:06,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:25:06,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153786318] [2023-08-04 07:25:06,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:25:06,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:25:06,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:06,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:25:06,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:06,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 178 [2023-08-04 07:25:06,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:25:06,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:06,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 178 [2023-08-04 07:25:06,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:06,085 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:25:06,085 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:25:06,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 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 07:25:06,086 INFO L140 encePairwiseOnDemand]: 175/178 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:25:06,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:25:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:25:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:25:06,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-08-04 07:25:06,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196629213483146 [2023-08-04 07:25:06,088 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-08-04 07:25:06,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-08-04 07:25:06,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:06,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-08-04 07:25:06,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 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 07:25:06,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 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 07:25:06,091 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 178.0) internal successors, (890), 5 states have internal predecessors, (890), 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 07:25:06,091 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 71 flow. Second operand 4 states and 370 transitions. [2023-08-04 07:25:06,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:25:06,092 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 07:25:06,092 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:25:06,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, 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 07:25:06,094 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -12 predicate places. [2023-08-04 07:25:06,094 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:25:06,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:25:06,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:25:06,107 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 07:25:06,307 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 07:25:06,308 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:25:06,309 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:25:06,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:25:06,352 INFO L124 PetriNetUnfolderBase]: 30/412 cut-off events. [2023-08-04 07:25:06,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:06,353 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 1844 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 07:25:06,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:25:06,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 76 transitions, 167 flow [2023-08-04 07:25:06,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:25:06,354 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 07:25:06,354 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 07:25:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 167 flow [2023-08-04 07:25:06,369 INFO L124 PetriNetUnfolderBase]: 6/188 cut-off events. [2023-08-04 07:25:06,369 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:06,369 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 577 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 07:25:06,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 07:25:07,808 INFO L134 LiptonReduction]: Checked pairs total: 2123 [2023-08-04 07:25:07,809 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-04 07:25:07,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:25:07,811 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;@63376382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:25:07,811 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:25:07,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:25:07,814 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 07:25:07,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:07,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:07,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:25:07,814 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 07:25:07,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash -293650196, now seen corresponding path program 1 times [2023-08-04 07:25:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:07,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383153498] [2023-08-04 07:25:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:07,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:07,869 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 07:25:07,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:07,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383153498] [2023-08-04 07:25:07,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383153498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:07,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:25:07,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:25:07,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367627843] [2023-08-04 07:25:07,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:07,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:07,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:07,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:07,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:25:07,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 162 [2023-08-04 07:25:07,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 07:25:07,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:07,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 162 [2023-08-04 07:25:07,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:07,928 INFO L124 PetriNetUnfolderBase]: 160/352 cut-off events. [2023-08-04 07:25:07,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:07,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 352 events. 160/352 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1792 event pairs, 78 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 706. Up to 284 conditions per place. [2023-08-04 07:25:07,930 INFO L140 encePairwiseOnDemand]: 159/162 looper letters, 18 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 07:25:07,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 07:25:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:07,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2023-08-04 07:25:07,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2023-08-04 07:25:07,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2023-08-04 07:25:07,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2023-08-04 07:25:07,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:07,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2023-08-04 07:25:07,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 07:25:07,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:25:07,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:25:07,934 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 294 transitions. [2023-08-04 07:25:07,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 07:25:07,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:25:07,935 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 07:25:07,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=162, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 07:25:07,936 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 07:25:07,936 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 07:25:07,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 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 07:25:07,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:07,937 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:25:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:25:07,937 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 07:25:07,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:07,937 INFO L85 PathProgramCache]: Analyzing trace with hash -290903780, now seen corresponding path program 1 times [2023-08-04 07:25:07,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925178869] [2023-08-04 07:25:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:25:07,948 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:25:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:25:07,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:25:07,966 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:25:07,966 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:25:07,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:25:07,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:25:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:25:07,967 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:25:07,967 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:25:07,968 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:25:07,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:25:07,983 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:25:07,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 125 transitions, 286 flow [2023-08-04 07:25:08,096 INFO L124 PetriNetUnfolderBase]: 93/1302 cut-off events. [2023-08-04 07:25:08,096 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:25:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 1302 events. 93/1302 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8879 event pairs, 0 based on Foata normal form. 0/1143 useless extension candidates. Maximal degree in co-relation 943. Up to 54 conditions per place. [2023-08-04 07:25:08,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 125 transitions, 286 flow [2023-08-04 07:25:08,104 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 110 transitions, 244 flow [2023-08-04 07:25:08,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:25:08,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 110 transitions, 244 flow [2023-08-04 07:25:08,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 110 transitions, 244 flow [2023-08-04 07:25:08,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 110 transitions, 244 flow [2023-08-04 07:25:08,177 INFO L124 PetriNetUnfolderBase]: 66/965 cut-off events. [2023-08-04 07:25:08,177 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:25:08,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 965 events. 66/965 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6025 event pairs, 0 based on Foata normal form. 0/860 useless extension candidates. Maximal degree in co-relation 715. Up to 54 conditions per place. [2023-08-04 07:25:08,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 07:25:09,759 INFO L134 LiptonReduction]: Checked pairs total: 8262 [2023-08-04 07:25:09,759 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-04 07:25:09,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:25:09,762 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;@63376382, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:25:09,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:25:09,764 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:25:09,764 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:25:09,764 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:25:09,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:09,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:25:09,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:09,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash 619066150, now seen corresponding path program 1 times [2023-08-04 07:25:09,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453077620] [2023-08-04 07:25:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:09,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:09,814 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 07:25:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453077620] [2023-08-04 07:25:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453077620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:25:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:25:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943962126] [2023-08-04 07:25:09,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:09,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:09,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:25:09,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 202 [2023-08-04 07:25:09,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 100 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 07:25:09,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:09,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 202 [2023-08-04 07:25:09,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:13,649 INFO L124 PetriNetUnfolderBase]: 33046/48143 cut-off events. [2023-08-04 07:25:13,649 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 07:25:13,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 48143 events. 33046/48143 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 340326 event pairs, 26064 based on Foata normal form. 0/45265 useless extension candidates. Maximal degree in co-relation 26602. Up to 43520 conditions per place. [2023-08-04 07:25:13,964 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 07:25:13,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 07:25:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:13,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:13,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-04 07:25:13,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5957095709570958 [2023-08-04 07:25:13,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-04 07:25:13,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-04 07:25:13,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:13,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-04 07:25:13,967 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 07:25:13,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:13,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:13,970 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 100 flow. Second operand 3 states and 361 transitions. [2023-08-04 07:25:13,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 07:25:13,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:25:13,974 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 07:25:13,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, 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=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 07:25:13,976 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 07:25:13,977 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 07:25:13,977 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 07:25:13,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:13,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:25:13,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:13,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 458624032, now seen corresponding path program 1 times [2023-08-04 07:25:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:13,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067493221] [2023-08-04 07:25:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:14,023 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 07:25:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:14,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067493221] [2023-08-04 07:25:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067493221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:14,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949978083] [2023-08-04 07:25:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:14,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:14,025 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 07:25:14,057 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 07:25:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:14,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:25:14,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:14,108 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 07:25:14,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:25:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949978083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:14,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:25:14,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:25:14,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222597741] [2023-08-04 07:25:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:14,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 202 [2023-08-04 07:25:14,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 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 07:25:14,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:14,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 202 [2023-08-04 07:25:14,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:16,721 INFO L124 PetriNetUnfolderBase]: 31406/45017 cut-off events. [2023-08-04 07:25:16,721 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 07:25:16,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87898 conditions, 45017 events. 31406/45017 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 310303 event pairs, 24928 based on Foata normal form. 0/42712 useless extension candidates. Maximal degree in co-relation 87861. Up to 40987 conditions per place. [2023-08-04 07:25:16,967 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 07:25:16,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 07:25:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-04 07:25:16,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023102310231023 [2023-08-04 07:25:16,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-04 07:25:16,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-04 07:25:16,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:16,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-04 07:25:16,978 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 07:25:16,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:16,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:16,981 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 365 transitions. [2023-08-04 07:25:16,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 07:25:16,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:25:16,985 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 07:25:16,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 07:25:16,986 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 07:25:16,987 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 07:25:16,987 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 07:25:16,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:16,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:16,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:25:17,191 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 07:25:17,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:17,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:17,192 INFO L85 PathProgramCache]: Analyzing trace with hash -443605949, now seen corresponding path program 1 times [2023-08-04 07:25:17,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:17,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119096687] [2023-08-04 07:25:17,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:17,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:17,247 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 07:25:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119096687] [2023-08-04 07:25:17,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119096687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312339489] [2023-08-04 07:25:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:17,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:17,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:17,249 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 07:25:17,253 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 07:25:17,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:17,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:25:17,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:17,329 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 07:25:17,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:25:17,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312339489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:17,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:25:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:25:17,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146179825] [2023-08-04 07:25:17,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:17,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:17,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:17,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 202 [2023-08-04 07:25:17,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 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 07:25:17,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:17,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 202 [2023-08-04 07:25:17,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:19,941 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 07:25:19,942 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 07:25:20,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290352 event pairs, 23582 based on Foata normal form. 0/41482 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 07:25:20,222 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 07:25:20,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 07:25:20,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:20,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-04 07:25:20,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089108910891089 [2023-08-04 07:25:20,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-04 07:25:20,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-04 07:25:20,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:20,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-04 07:25:20,227 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 07:25:20,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:20,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:20,230 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 369 transitions. [2023-08-04 07:25:20,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 07:25:20,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:25:20,234 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 07:25:20,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-04 07:25:20,236 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 07:25:20,236 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 07:25:20,236 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 07:25:20,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:20,237 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 07:25:20,242 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 07:25:20,442 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 07:25:20,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:20,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 26069812, now seen corresponding path program 1 times [2023-08-04 07:25:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022597180] [2023-08-04 07:25:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:20,503 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 07:25:20,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:20,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022597180] [2023-08-04 07:25:20,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022597180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982836063] [2023-08-04 07:25:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:20,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:20,507 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 07:25:20,537 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 07:25:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:20,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:25:20,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:20,610 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 07:25:20,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:25:20,633 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 07:25:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982836063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:25:20,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:25:20,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:25:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449259707] [2023-08-04 07:25:20,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:25:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:25:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:25:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:20,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:25:20,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 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 07:25:20,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:20,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:25:20,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:22,667 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 07:25:22,667 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 07:25:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 214144 event pairs, 14820 based on Foata normal form. 3/33760 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 07:25:22,909 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 07:25:22,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 07:25:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:25:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:25:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-04 07:25:22,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829207920792079 [2023-08-04 07:25:22,911 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-04 07:25:22,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-04 07:25:22,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:22,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-04 07:25:22,912 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 07:25:22,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:22,916 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:22,917 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 471 transitions. [2023-08-04 07:25:22,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 07:25:22,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:25:22,926 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 07:25:22,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 07:25:22,928 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 07:25:22,928 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 07:25:22,928 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 07:25:22,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:22,928 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 07:25:22,936 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 07:25:23,132 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 07:25:23,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:23,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:23,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1664522385, now seen corresponding path program 1 times [2023-08-04 07:25:23,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:23,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986069980] [2023-08-04 07:25:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:23,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:23,198 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 07:25:23,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986069980] [2023-08-04 07:25:23,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986069980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:23,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810005440] [2023-08-04 07:25:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:23,200 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 07:25:23,203 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 07:25:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:23,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:25:23,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:23,290 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 07:25:23,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:25:23,313 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 07:25:23,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810005440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:25:23,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:25:23,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:25:23,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908964009] [2023-08-04 07:25:23,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:25:23,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:25:23,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:25:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:23,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:25:23,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 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 07:25:23,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:23,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:25:23,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:25,042 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 07:25:25,042 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 07:25:25,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160363 event pairs, 11902 based on Foata normal form. 27/26430 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 07:25:25,520 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 07:25:25,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 07:25:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:25:25,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:25:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 07:25:25,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928217821782178 [2023-08-04 07:25:25,523 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 07:25:25,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 07:25:25,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:25,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 07:25:25,524 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 07:25:25,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:25,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:25,526 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 479 transitions. [2023-08-04 07:25:25,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 07:25:25,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:25:25,541 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 07:25:25,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 07:25:25,542 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 07:25:25,542 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 07:25:25,543 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 07:25:25,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:25,543 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 07:25:25,551 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 07:25:25,748 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 07:25:25,748 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:25,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 581468209, now seen corresponding path program 1 times [2023-08-04 07:25:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:25,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016755637] [2023-08-04 07:25:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:25,810 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 07:25:25,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016755637] [2023-08-04 07:25:25,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016755637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:25,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10398192] [2023-08-04 07:25:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:25,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:25,812 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 07:25:25,815 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 07:25:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:25,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:25:25,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:25,917 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 07:25:25,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:25:25,930 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 07:25:25,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10398192] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:25:25,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:25:25,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:25:25,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895674785] [2023-08-04 07:25:25,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:25:25,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:25:25,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:25,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:25:25,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:25,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:25:25,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 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 07:25:25,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:25,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:25:25,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:27,303 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 07:25:27,303 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 07:25:27,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 128226 event pairs, 6886 based on Foata normal form. 243/23370 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 07:25:27,434 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 07:25:27,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 07:25:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:25:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:25:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 07:25:27,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027227722772277 [2023-08-04 07:25:27,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 07:25:27,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 07:25:27,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:27,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 07:25:27,439 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 07:25:27,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:27,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:25:27,440 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 487 transitions. [2023-08-04 07:25:27,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 07:25:27,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:25:27,444 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 07:25:27,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-04 07:25:27,445 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 07:25:27,445 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 07:25:27,445 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 07:25:27,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:27,446 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 07:25:27,451 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 07:25:27,651 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 07:25:27,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:27,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:27,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1973051485, now seen corresponding path program 1 times [2023-08-04 07:25:27,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:27,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150529740] [2023-08-04 07:25:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:27,865 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 07:25:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150529740] [2023-08-04 07:25:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150529740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:27,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:25:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:25:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227311040] [2023-08-04 07:25:27,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:25:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:25:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 07:25:27,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:27,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:25:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:38,658 INFO L124 PetriNetUnfolderBase]: 148796/187140 cut-off events. [2023-08-04 07:25:38,658 INFO L125 PetriNetUnfolderBase]: For 80545/80545 co-relation queries the response was YES. [2023-08-04 07:25:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 425051 conditions, 187140 events. 148796/187140 cut-off events. For 80545/80545 co-relation queries the response was YES. Maximal size of possible extension queue 5102. Compared 1014940 event pairs, 42339 based on Foata normal form. 4033/190797 useless extension candidates. Maximal degree in co-relation 231510. Up to 99910 conditions per place. [2023-08-04 07:25:39,806 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 60 selfloop transitions, 13 changer transitions 0/76 dead transitions. [2023-08-04 07:25:39,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 76 transitions, 444 flow [2023-08-04 07:25:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-04 07:25:39,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5973597359735974 [2023-08-04 07:25:39,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-04 07:25:39,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-04 07:25:39,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:39,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-04 07:25:39,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 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 07:25:39,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:39,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:39,810 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 362 transitions. [2023-08-04 07:25:39,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 76 transitions, 444 flow [2023-08-04 07:25:40,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 430 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:25:40,104 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 253 flow [2023-08-04 07:25:40,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=253, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-04 07:25:40,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 07:25:40,105 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 253 flow [2023-08-04 07:25:40,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 07:25:40,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:40,105 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 07:25:40,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:25:40,105 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:40,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash -418974506, now seen corresponding path program 1 times [2023-08-04 07:25:40,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:40,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532519946] [2023-08-04 07:25:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 07:25:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532519946] [2023-08-04 07:25:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532519946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:25:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685264704] [2023-08-04 07:25:40,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:25:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:25:40,299 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 07:25:40,301 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 07:25:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:40,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:25:40,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:25:40,439 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 07:25:40,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:25:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685264704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:25:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-04 07:25:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102156974] [2023-08-04 07:25:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:25:40,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 202 [2023-08-04 07:25:40,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 07:25:40,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:40,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 202 [2023-08-04 07:25:40,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:25:48,474 INFO L124 PetriNetUnfolderBase]: 85948/114392 cut-off events. [2023-08-04 07:25:48,474 INFO L125 PetriNetUnfolderBase]: For 124704/128258 co-relation queries the response was YES. [2023-08-04 07:25:48,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334960 conditions, 114392 events. 85948/114392 cut-off events. For 124704/128258 co-relation queries the response was YES. Maximal size of possible extension queue 4366. Compared 735155 event pairs, 18135 based on Foata normal form. 666/112552 useless extension candidates. Maximal degree in co-relation 216302. Up to 91323 conditions per place. [2023-08-04 07:25:49,366 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 65 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-08-04 07:25:49,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 560 flow [2023-08-04 07:25:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:25:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:25:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-04 07:25:49,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6155115511551155 [2023-08-04 07:25:49,368 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-04 07:25:49,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-04 07:25:49,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:25:49,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-04 07:25:49,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 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 07:25:49,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:49,370 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:25:49,370 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 253 flow. Second operand 3 states and 373 transitions. [2023-08-04 07:25:49,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 560 flow [2023-08-04 07:25:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 522 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:25:49,489 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 274 flow [2023-08-04 07:25:49,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-04 07:25:49,490 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-08-04 07:25:49,490 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 274 flow [2023-08-04 07:25:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 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 07:25:49,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:25:49,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:25:49,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 07:25:49,696 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,SelfDestructingSolverStorable13 [2023-08-04 07:25:49,696 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:25:49,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:25:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1299395880, now seen corresponding path program 1 times [2023-08-04 07:25:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:25:49,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420364405] [2023-08-04 07:25:49,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:25:49,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:25:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:25:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 07:25:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:25:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420364405] [2023-08-04 07:25:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420364405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:25:49,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:25:49,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:25:49,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029421246] [2023-08-04 07:25:49,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:25:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:25:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:25:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:25:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:25:49,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:25:49,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 07:25:49,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:25:49,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:25:49,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:26:05,206 INFO L124 PetriNetUnfolderBase]: 170228/223913 cut-off events. [2023-08-04 07:26:05,207 INFO L125 PetriNetUnfolderBase]: For 179822/179950 co-relation queries the response was YES. [2023-08-04 07:26:06,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675782 conditions, 223913 events. 170228/223913 cut-off events. For 179822/179950 co-relation queries the response was YES. Maximal size of possible extension queue 7353. Compared 1474554 event pairs, 49730 based on Foata normal form. 1623/224437 useless extension candidates. Maximal degree in co-relation 427984. Up to 102058 conditions per place. [2023-08-04 07:26:07,093 INFO L140 encePairwiseOnDemand]: 197/202 looper letters, 85 selfloop transitions, 8 changer transitions 0/104 dead transitions. [2023-08-04 07:26:07,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 677 flow [2023-08-04 07:26:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:26:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:26:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2023-08-04 07:26:07,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6336633663366337 [2023-08-04 07:26:07,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2023-08-04 07:26:07,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2023-08-04 07:26:07,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:26:07,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2023-08-04 07:26:07,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 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 07:26:07,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:26:07,098 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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 07:26:07,098 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 274 flow. Second operand 3 states and 384 transitions. [2023-08-04 07:26:07,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 677 flow [2023-08-04 07:26:07,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 664 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:26:07,320 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 349 flow [2023-08-04 07:26:07,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-04 07:26:07,321 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-04 07:26:07,321 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 349 flow [2023-08-04 07:26:07,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 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 07:26:07,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:26:07,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:26:07,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:26:07,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:26:07,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:26:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 758263081, now seen corresponding path program 1 times [2023-08-04 07:26:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:26:07,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538121068] [2023-08-04 07:26:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:26:07,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:26:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:26:07,434 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 07:26:07,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:26:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538121068] [2023-08-04 07:26:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538121068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:26:07,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:26:07,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:26:07,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920120148] [2023-08-04 07:26:07,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:26:07,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:26:07,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:26:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:26:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:26:07,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:26:07,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 349 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:26:07,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:26:07,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:26:07,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:26:24,083 INFO L124 PetriNetUnfolderBase]: 205921/260503 cut-off events. [2023-08-04 07:26:24,084 INFO L125 PetriNetUnfolderBase]: For 328966/328966 co-relation queries the response was YES. [2023-08-04 07:26:25,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892968 conditions, 260503 events. 205921/260503 cut-off events. For 328966/328966 co-relation queries the response was YES. Maximal size of possible extension queue 7415. Compared 1505676 event pairs, 24857 based on Foata normal form. 21/260466 useless extension candidates. Maximal degree in co-relation 334226. Up to 145817 conditions per place. [2023-08-04 07:26:25,924 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 103 selfloop transitions, 25 changer transitions 0/131 dead transitions. [2023-08-04 07:26:25,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 131 transitions, 941 flow [2023-08-04 07:26:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:26:25,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:26:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-04 07:26:25,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891089108910891 [2023-08-04 07:26:25,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-04 07:26:25,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-04 07:26:25,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:26:25,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-04 07:26:25,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 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 07:26:25,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:26:25,929 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:26:25,929 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 349 flow. Second operand 4 states and 476 transitions. [2023-08-04 07:26:25,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 131 transitions, 941 flow [2023-08-04 07:26:28,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 131 transitions, 913 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:26:28,772 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 551 flow [2023-08-04 07:26:28,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=551, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2023-08-04 07:26:28,773 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2023-08-04 07:26:28,773 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 551 flow [2023-08-04 07:26:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:26:28,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:26:28,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:26:28,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 07:26:28,773 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:26:28,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:26:28,774 INFO L85 PathProgramCache]: Analyzing trace with hash -579635396, now seen corresponding path program 1 times [2023-08-04 07:26:28,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:26:28,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405507894] [2023-08-04 07:26:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:26:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:26:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:26:28,897 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 07:26:28,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:26:28,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405507894] [2023-08-04 07:26:28,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405507894] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:26:28,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:26:28,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:26:28,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393433270] [2023-08-04 07:26:28,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:26:28,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:26:28,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:26:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:26:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:26:28,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:26:28,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 551 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 07:26:28,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:26:28,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:26:28,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:26:58,556 INFO L124 PetriNetUnfolderBase]: 309422/393256 cut-off events. [2023-08-04 07:26:58,556 INFO L125 PetriNetUnfolderBase]: For 785436/785436 co-relation queries the response was YES. [2023-08-04 07:27:00,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571795 conditions, 393256 events. 309422/393256 cut-off events. For 785436/785436 co-relation queries the response was YES. Maximal size of possible extension queue 11929. Compared 2454002 event pairs, 40612 based on Foata normal form. 1623/394780 useless extension candidates. Maximal degree in co-relation 1031026. Up to 181016 conditions per place. [2023-08-04 07:27:01,949 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 127 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2023-08-04 07:27:01,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 169 transitions, 1374 flow [2023-08-04 07:27:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:27:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:27:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 07:27:01,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027227722772277 [2023-08-04 07:27:01,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 07:27:01,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 07:27:01,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:27:01,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 07:27:01,953 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 07:27:01,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:27:01,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:27:01,955 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 551 flow. Second operand 4 states and 487 transitions. [2023-08-04 07:27:01,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 169 transitions, 1374 flow [2023-08-04 07:27:02,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 169 transitions, 1374 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:27:02,815 INFO L231 Difference]: Finished difference. Result has 81 places, 105 transitions, 913 flow [2023-08-04 07:27:02,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=913, PETRI_PLACES=81, PETRI_TRANSITIONS=105} [2023-08-04 07:27:02,816 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2023-08-04 07:27:02,816 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 105 transitions, 913 flow [2023-08-04 07:27:02,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 07:27:02,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:27:02,816 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:27:02,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 07:27:02,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:27:02,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:27:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1473956605, now seen corresponding path program 1 times [2023-08-04 07:27:02,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:27:02,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383395234] [2023-08-04 07:27:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:27:02,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:27:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:27:02,919 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 07:27:02,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:27:02,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383395234] [2023-08-04 07:27:02,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383395234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:27:02,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:27:02,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:27:02,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076173282] [2023-08-04 07:27:02,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:27:02,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:27:02,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:27:02,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:27:02,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:27:02,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:27:02,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 105 transitions, 913 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:27:02,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:27:02,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:27:02,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:27:33,283 INFO L124 PetriNetUnfolderBase]: 309033/391988 cut-off events. [2023-08-04 07:27:33,283 INFO L125 PetriNetUnfolderBase]: For 1234936/1234936 co-relation queries the response was YES. [2023-08-04 07:27:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814698 conditions, 391988 events. 309033/391988 cut-off events. For 1234936/1234936 co-relation queries the response was YES. Maximal size of possible extension queue 11896. Compared 2437514 event pairs, 45693 based on Foata normal form. 21/391981 useless extension candidates. Maximal degree in co-relation 1814564. Up to 229684 conditions per place. [2023-08-04 07:27:36,985 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 129 selfloop transitions, 57 changer transitions 0/189 dead transitions. [2023-08-04 07:27:36,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 189 transitions, 1867 flow [2023-08-04 07:27:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:27:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:27:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-04 07:27:36,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014851485148515 [2023-08-04 07:27:36,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-04 07:27:36,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-04 07:27:36,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:27:36,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-04 07:27:36,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 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 07:27:36,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:27:36,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:27:36,990 INFO L175 Difference]: Start difference. First operand has 81 places, 105 transitions, 913 flow. Second operand 4 states and 486 transitions. [2023-08-04 07:27:36,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 189 transitions, 1867 flow [2023-08-04 07:27:41,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 189 transitions, 1867 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:27:41,216 INFO L231 Difference]: Finished difference. Result has 87 places, 129 transitions, 1415 flow [2023-08-04 07:27:41,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1415, PETRI_PLACES=87, PETRI_TRANSITIONS=129} [2023-08-04 07:27:41,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 36 predicate places. [2023-08-04 07:27:41,217 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 129 transitions, 1415 flow [2023-08-04 07:27:41,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:27:41,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:27:41,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:27:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 07:27:41,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:27:41,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:27:41,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1659169241, now seen corresponding path program 1 times [2023-08-04 07:27:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:27:41,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835853006] [2023-08-04 07:27:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:27:41,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:27:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:27:41,323 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 07:27:41,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:27:41,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835853006] [2023-08-04 07:27:41,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835853006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:27:41,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:27:41,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:27:41,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501218722] [2023-08-04 07:27:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:27:41,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:27:41,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:27:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:27:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:27:41,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:27:41,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 129 transitions, 1415 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:27:41,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:27:41,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:27:41,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:28:17,322 INFO L124 PetriNetUnfolderBase]: 308463/391214 cut-off events. [2023-08-04 07:28:17,322 INFO L125 PetriNetUnfolderBase]: For 2199846/2199846 co-relation queries the response was YES. [2023-08-04 07:28:20,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077017 conditions, 391214 events. 308463/391214 cut-off events. For 2199846/2199846 co-relation queries the response was YES. Maximal size of possible extension queue 11873. Compared 2415923 event pairs, 53700 based on Foata normal form. 23/391220 useless extension candidates. Maximal degree in co-relation 1494606. Up to 229770 conditions per place. [2023-08-04 07:28:21,440 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 128 selfloop transitions, 73 changer transitions 0/204 dead transitions. [2023-08-04 07:28:21,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 204 transitions, 2391 flow [2023-08-04 07:28:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:28:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:28:21,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2023-08-04 07:28:21,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.599009900990099 [2023-08-04 07:28:21,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2023-08-04 07:28:21,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2023-08-04 07:28:21,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:28:21,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2023-08-04 07:28:21,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 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 07:28:21,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:28:21,444 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:28:21,444 INFO L175 Difference]: Start difference. First operand has 87 places, 129 transitions, 1415 flow. Second operand 4 states and 484 transitions. [2023-08-04 07:28:21,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 204 transitions, 2391 flow [2023-08-04 07:28:28,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 204 transitions, 2391 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:28:28,067 INFO L231 Difference]: Finished difference. Result has 93 places, 147 transitions, 1989 flow [2023-08-04 07:28:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1989, PETRI_PLACES=93, PETRI_TRANSITIONS=147} [2023-08-04 07:28:28,068 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2023-08-04 07:28:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 147 transitions, 1989 flow [2023-08-04 07:28:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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 07:28:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:28:28,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:28:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 07:28:28,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:28:28,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:28:28,069 INFO L85 PathProgramCache]: Analyzing trace with hash 556765314, now seen corresponding path program 1 times [2023-08-04 07:28:28,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:28:28,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537212963] [2023-08-04 07:28:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:28:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:28:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:28:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:28:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:28:28,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537212963] [2023-08-04 07:28:28,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537212963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:28:28,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:28:28,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:28:28,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715987734] [2023-08-04 07:28:28,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:28:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:28:28,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:28:28,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:28:28,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:28:28,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 202 [2023-08-04 07:28:28,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 147 transitions, 1989 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 07:28:28,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:28:28,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 202 [2023-08-04 07:28:28,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:29:30,515 INFO L124 PetriNetUnfolderBase]: 440898/562727 cut-off events. [2023-08-04 07:29:30,515 INFO L125 PetriNetUnfolderBase]: For 4455209/4455209 co-relation queries the response was YES. [2023-08-04 07:29:34,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3298093 conditions, 562727 events. 440898/562727 cut-off events. For 4455209/4455209 co-relation queries the response was YES. Maximal size of possible extension queue 17965. Compared 3692229 event pairs, 57280 based on Foata normal form. 1577/564102 useless extension candidates. Maximal degree in co-relation 2390304. Up to 245730 conditions per place. [2023-08-04 07:29:36,318 INFO L140 encePairwiseOnDemand]: 188/202 looper letters, 159 selfloop transitions, 85 changer transitions 0/247 dead transitions. [2023-08-04 07:29:36,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 247 transitions, 3513 flow [2023-08-04 07:29:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:29:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:29:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-08-04 07:29:36,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5965346534653465 [2023-08-04 07:29:36,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-08-04 07:29:36,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-08-04 07:29:36,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:29:36,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-08-04 07:29:36,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 07:29:36,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:29:36,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 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 07:29:36,323 INFO L175 Difference]: Start difference. First operand has 93 places, 147 transitions, 1989 flow. Second operand 4 states and 482 transitions. [2023-08-04 07:29:36,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 247 transitions, 3513 flow [2023-08-04 07:29:45,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 247 transitions, 3497 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-04 07:29:45,626 INFO L231 Difference]: Finished difference. Result has 99 places, 183 transitions, 3047 flow [2023-08-04 07:29:45,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3047, PETRI_PLACES=99, PETRI_TRANSITIONS=183} [2023-08-04 07:29:45,627 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2023-08-04 07:29:45,627 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 183 transitions, 3047 flow [2023-08-04 07:29:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 07:29:45,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:29:45,628 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 07:29:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 07:29:45,628 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:29:45,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:29:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash -670250264, now seen corresponding path program 1 times [2023-08-04 07:29:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:29:45,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054011345] [2023-08-04 07:29:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:29:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:29:45,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:29:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054011345] [2023-08-04 07:29:45,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054011345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:29:45,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078417708] [2023-08-04 07:29:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:29:45,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:29:45,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:29:45,725 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 07:29:45,756 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 07:29:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:29:45,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 07:29:45,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:29:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:29:45,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:29:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:29:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078417708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:29:46,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:29:46,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 6] total 11 [2023-08-04 07:29:46,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764802615] [2023-08-04 07:29:46,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:29:46,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-04 07:29:46,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:29:46,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-04 07:29:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-04 07:29:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-04 07:29:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 183 transitions, 3047 flow. Second operand has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 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 07:29:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:29:46,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-04 07:29:46,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:30:51,617 INFO L124 PetriNetUnfolderBase]: 430783/552603 cut-off events. [2023-08-04 07:30:51,617 INFO L125 PetriNetUnfolderBase]: For 7664287/7664287 co-relation queries the response was YES. [2023-08-04 07:30:56,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3587971 conditions, 552603 events. 430783/552603 cut-off events. For 7664287/7664287 co-relation queries the response was YES. Maximal size of possible extension queue 18990. Compared 3701430 event pairs, 12343 based on Foata normal form. 11548/564105 useless extension candidates. Maximal degree in co-relation 3587792. Up to 205333 conditions per place. [2023-08-04 07:30:57,627 INFO L140 encePairwiseOnDemand]: 181/202 looper letters, 604 selfloop transitions, 338 changer transitions 62/1007 dead transitions. [2023-08-04 07:30:57,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1007 transitions, 16379 flow [2023-08-04 07:30:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 07:30:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 07:30:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1882 transitions. [2023-08-04 07:30:57,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823019801980198 [2023-08-04 07:30:57,632 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1882 transitions. [2023-08-04 07:30:57,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1882 transitions. [2023-08-04 07:30:57,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:30:57,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1882 transitions. [2023-08-04 07:30:57,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 117.625) internal successors, (1882), 16 states have internal predecessors, (1882), 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 07:30:57,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 202.0) internal successors, (3434), 17 states have internal predecessors, (3434), 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 07:30:57,641 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 202.0) internal successors, (3434), 17 states have internal predecessors, (3434), 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 07:30:57,641 INFO L175 Difference]: Start difference. First operand has 99 places, 183 transitions, 3047 flow. Second operand 16 states and 1882 transitions. [2023-08-04 07:30:57,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 1007 transitions, 16379 flow [2023-08-04 07:31:24,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 1007 transitions, 16379 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:31:24,425 INFO L231 Difference]: Finished difference. Result has 128 places, 522 transitions, 9986 flow [2023-08-04 07:31:24,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=3047, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9986, PETRI_PLACES=128, PETRI_TRANSITIONS=522} [2023-08-04 07:31:24,426 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2023-08-04 07:31:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 522 transitions, 9986 flow [2023-08-04 07:31:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 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 07:31:24,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:31:24,426 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] [2023-08-04 07:31:24,434 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 07:31:24,633 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,SelfDestructingSolverStorable20 [2023-08-04 07:31:24,634 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:31:24,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:31:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1254404102, now seen corresponding path program 1 times [2023-08-04 07:31:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:31:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038794397] [2023-08-04 07:31:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:31:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:24,759 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 07:31:24,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:31:24,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038794397] [2023-08-04 07:31:24,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038794397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:31:24,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476782764] [2023-08-04 07:31:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:31:24,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:31:24,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:31:24,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:31:24,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:31:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:31:24,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-04 07:31:24,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:31:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:31:24,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:31:25,155 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 07:31:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476782764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:31:25,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:31:25,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 7] total 15 [2023-08-04 07:31:25,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370001967] [2023-08-04 07:31:25,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:31:25,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 07:31:25,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:31:25,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 07:31:25,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-08-04 07:31:25,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 202 [2023-08-04 07:31:25,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 522 transitions, 9986 flow. Second operand has 16 states, 16 states have (on average 95.0625) internal successors, (1521), 16 states have internal predecessors, (1521), 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 07:31:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:31:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 202 [2023-08-04 07:31:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:33:50,587 INFO L124 PetriNetUnfolderBase]: 584606/748402 cut-off events. [2023-08-04 07:33:50,587 INFO L125 PetriNetUnfolderBase]: For 14342651/14342651 co-relation queries the response was YES.