/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_safe003_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:34:14,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:34:14,121 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:34:14,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:34:14,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:34:14,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:34:14,128 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:34:14,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:34:14,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:34:14,159 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:34:14,160 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:34:14,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:34:14,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:34:14,162 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:34:14,162 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:34:14,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:34:14,162 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:34:14,163 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:34:14,163 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:34:14,163 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:34:14,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:34:14,164 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:34:14,164 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:34:14,164 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:34:14,164 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:34:14,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:34:14,165 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:34:14,165 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:34:14,165 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:34:14,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:34:14,166 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:34:14,167 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:34:14,167 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:34:14,168 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:34:14,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:34:14,168 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:34:14,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:34:14,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:34:14,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:34:14,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:34:14,438 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:34:14,438 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:34:14,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe003_tso_bound2.i [2023-08-04 06:34:15,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:34:15,967 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:34:15,967 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe003_tso_bound2.i [2023-08-04 06:34:15,985 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e1895a0/dd89ed435ae5450b8d394362036659ae/FLAGf091b2609 [2023-08-04 06:34:15,999 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e1895a0/dd89ed435ae5450b8d394362036659ae [2023-08-04 06:34:16,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:34:16,004 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:34:16,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:34:16,005 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:34:16,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:34:16,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638c39fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16, skipping insertion in model container [2023-08-04 06:34:16,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,071 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:34:16,239 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_safe003_tso_bound2.i[945,958] [2023-08-04 06:34:16,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:34:16,443 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:34:16,453 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_safe003_tso_bound2.i[945,958] [2023-08-04 06:34:16,473 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:34:16,474 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:34:16,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:34:16,532 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:34:16,533 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:34:16,538 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:34:16,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16 WrapperNode [2023-08-04 06:34:16,539 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:34:16,540 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:34:16,540 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:34:16,540 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:34:16,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,596 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-08-04 06:34:16,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:34:16,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:34:16,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:34:16,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:34:16,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,614 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,621 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:34:16,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:34:16,622 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:34:16,622 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:34:16,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (1/1) ... [2023-08-04 06:34:16,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:34:16,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:16,648 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 06:34:16,650 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 06:34:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:34:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:34:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:34:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:34:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:34:16,680 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:34:16,680 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:34:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:34:16,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:34:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:34:16,681 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:34:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:34:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:34:16,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:34:16,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:34:16,682 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 06:34:16,783 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:34:16,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:34:16,916 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:34:16,922 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:34:16,923 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:34:16,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:34:16 BoogieIcfgContainer [2023-08-04 06:34:16,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:34:16,926 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:34:16,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:34:16,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:34:16,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:34:16" (1/3) ... [2023-08-04 06:34:16,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662bc9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:34:16, skipping insertion in model container [2023-08-04 06:34:16,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:34:16" (2/3) ... [2023-08-04 06:34:16,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662bc9e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:34:16, skipping insertion in model container [2023-08-04 06:34:16,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:34:16" (3/3) ... [2023-08-04 06:34:16,932 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe003_tso_bound2.i [2023-08-04 06:34:16,938 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:34:16,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:34:16,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:34:16,944 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:34:16,990 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:34:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 06:34:17,145 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 06:34:17,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:17,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1842 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-04 06:34:17,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 06:34:17,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 91 transitions, 191 flow [2023-08-04 06:34:17,170 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:34:17,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 94 places, 91 transitions, 191 flow [2023-08-04 06:34:17,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 94 places, 91 transitions, 191 flow [2023-08-04 06:34:17,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 91 transitions, 191 flow [2023-08-04 06:34:17,224 INFO L124 PetriNetUnfolderBase]: 22/311 cut-off events. [2023-08-04 06:34:17,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:17,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 311 events. 22/311 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1251 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 189. Up to 16 conditions per place. [2023-08-04 06:34:17,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 1620 [2023-08-04 06:34:19,062 INFO L134 LiptonReduction]: Checked pairs total: 2939 [2023-08-04 06:34:19,062 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-04 06:34:19,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:34:19,078 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;@2e0c4dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:34:19,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:34:19,082 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:34:19,082 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-08-04 06:34:19,083 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:19,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:19,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:34:19,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:19,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash 357342394, now seen corresponding path program 1 times [2023-08-04 06:34:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:19,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633717053] [2023-08-04 06:34:19,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:19,291 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 06:34:19,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633717053] [2023-08-04 06:34:19,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633717053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:19,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:34:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019691699] [2023-08-04 06:34:19,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:19,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:19,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:34:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 183 [2023-08-04 06:34:19,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 57 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 06:34:19,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:19,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 183 [2023-08-04 06:34:19,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:19,504 INFO L124 PetriNetUnfolderBase]: 400/751 cut-off events. [2023-08-04 06:34:19,504 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 06:34:19,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1460 conditions, 751 events. 400/751 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3807 event pairs, 222 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 1447. Up to 668 conditions per place. [2023-08-04 06:34:19,511 INFO L140 encePairwiseOnDemand]: 179/183 looper letters, 20 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-04 06:34:19,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 107 flow [2023-08-04 06:34:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2023-08-04 06:34:19,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537340619307832 [2023-08-04 06:34:19,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2023-08-04 06:34:19,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2023-08-04 06:34:19,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:19,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2023-08-04 06:34:19,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,538 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,539 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 57 flow. Second operand 3 states and 304 transitions. [2023-08-04 06:34:19,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 107 flow [2023-08-04 06:34:19,542 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 06:34:19,543 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 63 flow [2023-08-04 06:34:19,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, 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 06:34:19,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 06:34:19,548 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 63 flow [2023-08-04 06:34:19,548 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 06:34:19,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:19,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:19,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:34:19,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:19,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:19,550 INFO L85 PathProgramCache]: Analyzing trace with hash 646482320, now seen corresponding path program 1 times [2023-08-04 06:34:19,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:19,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529396590] [2023-08-04 06:34:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:19,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:19,651 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 06:34:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529396590] [2023-08-04 06:34:19,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529396590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716761233] [2023-08-04 06:34:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:19,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:19,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:19,657 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 06:34:19,661 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 06:34:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:19,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:34:19,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:19,745 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 06:34:19,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:34:19,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716761233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:19,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:34:19,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:34:19,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270467265] [2023-08-04 06:34:19,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:19,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:19,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:19,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:19,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 183 [2023-08-04 06:34:19,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:19,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 183 [2023-08-04 06:34:19,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:19,843 INFO L124 PetriNetUnfolderBase]: 338/604 cut-off events. [2023-08-04 06:34:19,843 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 06:34:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1200 conditions, 604 events. 338/604 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2739 event pairs, 262 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 1184. Up to 529 conditions per place. [2023-08-04 06:34:19,847 INFO L140 encePairwiseOnDemand]: 180/183 looper letters, 22 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 06:34:19,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 123 flow [2023-08-04 06:34:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:19,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-04 06:34:19,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 06:34:19,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-04 06:34:19,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-04 06:34:19,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:19,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-04 06:34:19,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,870 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 63 flow. Second operand 3 states and 305 transitions. [2023-08-04 06:34:19,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 123 flow [2023-08-04 06:34:19,871 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 06:34:19,872 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 67 flow [2023-08-04 06:34:19,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, 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 06:34:19,873 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-04 06:34:19,873 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 67 flow [2023-08-04 06:34:19,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:19,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:19,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:19,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 06:34:20,079 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 06:34:20,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:20,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:20,080 INFO L85 PathProgramCache]: Analyzing trace with hash 538820375, now seen corresponding path program 1 times [2023-08-04 06:34:20,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:20,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013143996] [2023-08-04 06:34:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:20,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:20,187 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 06:34:20,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013143996] [2023-08-04 06:34:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013143996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:20,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550081720] [2023-08-04 06:34:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:20,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:20,193 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 06:34:20,215 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 06:34:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:20,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:34:20,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:20,283 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 06:34:20,283 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:34:20,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550081720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:20,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:34:20,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:34:20,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446137932] [2023-08-04 06:34:20,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:20,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:20,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:20,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 183 [2023-08-04 06:34:20,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 23 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:20,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 183 [2023-08-04 06:34:20,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:20,377 INFO L124 PetriNetUnfolderBase]: 314/532 cut-off events. [2023-08-04 06:34:20,377 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 06:34:20,378 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 48. Compared 2342 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 06:34:20,380 INFO L140 encePairwiseOnDemand]: 180/183 looper letters, 24 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 06:34:20,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 135 flow [2023-08-04 06:34:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:20,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-08-04 06:34:20,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5591985428051002 [2023-08-04 06:34:20,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-08-04 06:34:20,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-08-04 06:34:20,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:20,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-08-04 06:34:20,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,386 INFO L175 Difference]: Start difference. First operand has 34 places, 23 transitions, 67 flow. Second operand 3 states and 307 transitions. [2023-08-04 06:34:20,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 135 flow [2023-08-04 06:34:20,387 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 06:34:20,388 INFO L231 Difference]: Finished difference. Result has 35 places, 23 transitions, 71 flow [2023-08-04 06:34:20,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, 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 06:34:20,389 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-08-04 06:34:20,389 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 23 transitions, 71 flow [2023-08-04 06:34:20,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:20,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:20,397 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 06:34:20,595 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 06:34:20,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:20,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1691162617, now seen corresponding path program 1 times [2023-08-04 06:34:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:20,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446669240] [2023-08-04 06:34:20,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:20,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:20,657 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 06:34:20,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446669240] [2023-08-04 06:34:20,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446669240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:20,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776567247] [2023-08-04 06:34:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:20,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:20,660 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 06:34:20,682 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 06:34:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:20,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:20,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:20,775 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 06:34:20,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:20,794 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 06:34:20,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776567247] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:20,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:20,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:34:20,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125730682] [2023-08-04 06:34:20,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:20,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:34:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:34:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:20,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 183 [2023-08-04 06:34:20,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 23 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:20,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 183 [2023-08-04 06:34:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:20,855 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:34:20,855 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:20,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:34:20,855 INFO L140 encePairwiseOnDemand]: 180/183 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:34:20,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:34:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-08-04 06:34:20,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163934426229508 [2023-08-04 06:34:20,858 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-08-04 06:34:20,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-08-04 06:34:20,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:20,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-08-04 06:34:20,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,862 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,862 INFO L175 Difference]: Start difference. First operand has 35 places, 23 transitions, 71 flow. Second operand 4 states and 378 transitions. [2023-08-04 06:34:20,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:34:20,862 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 06:34:20,862 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:34:20,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=183, 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 06:34:20,863 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -12 predicate places. [2023-08-04 06:34:20,863 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:34:20,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.6) internal successors, (478), 5 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:20,866 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:34:20,875 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 06:34:21,072 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 06:34:21,072 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:34:21,074 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:34:21,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 06:34:21,108 INFO L124 PetriNetUnfolderBase]: 30/414 cut-off events. [2023-08-04 06:34:21,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:21,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439 conditions, 414 events. 30/414 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1842 event pairs, 0 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 243. Up to 16 conditions per place. [2023-08-04 06:34:21,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 106 transitions, 227 flow [2023-08-04 06:34:21,110 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 78 transitions, 171 flow [2023-08-04 06:34:21,110 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:34:21,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 06:34:21,111 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 78 transitions, 171 flow [2023-08-04 06:34:21,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 78 transitions, 171 flow [2023-08-04 06:34:21,121 INFO L124 PetriNetUnfolderBase]: 6/190 cut-off events. [2023-08-04 06:34:21,122 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 190 events. 6/190 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 585 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-04 06:34:21,123 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 06:34:22,524 INFO L134 LiptonReduction]: Checked pairs total: 2194 [2023-08-04 06:34:22,524 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 06:34:22,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:34:22,531 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;@2e0c4dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:34:22,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:34:22,534 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:34:22,534 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 06:34:22,535 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:22,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:22,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:34:22,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:34:22,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:22,535 INFO L85 PathProgramCache]: Analyzing trace with hash -61867689, now seen corresponding path program 1 times [2023-08-04 06:34:22,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:22,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827104355] [2023-08-04 06:34:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:22,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:34:22,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:34:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:34:22,571 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:34:22,571 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:34:22,572 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:34:22,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:34:22,572 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:34:22,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:34:22,572 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:34:22,573 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:34:22,573 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:34:22,573 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:34:22,589 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:34:22,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 06:34:22,688 INFO L124 PetriNetUnfolderBase]: 93/1304 cut-off events. [2023-08-04 06:34:22,688 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:34:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402 conditions, 1304 events. 93/1304 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8852 event pairs, 0 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 945. Up to 54 conditions per place. [2023-08-04 06:34:22,693 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 127 transitions, 290 flow [2023-08-04 06:34:22,696 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 112 transitions, 248 flow [2023-08-04 06:34:22,696 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:34:22,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 06:34:22,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 112 transitions, 248 flow [2023-08-04 06:34:22,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 112 transitions, 248 flow [2023-08-04 06:34:22,770 INFO L124 PetriNetUnfolderBase]: 66/967 cut-off events. [2023-08-04 06:34:22,770 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:34:22,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1039 conditions, 967 events. 66/967 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5981 event pairs, 0 based on Foata normal form. 0/862 useless extension candidates. Maximal degree in co-relation 717. Up to 54 conditions per place. [2023-08-04 06:34:22,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 06:34:24,425 INFO L134 LiptonReduction]: Checked pairs total: 8213 [2023-08-04 06:34:24,425 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-04 06:34:24,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:34:24,427 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;@2e0c4dcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:34:24,427 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:34:24,429 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:34:24,429 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-04 06:34:24,429 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:34:24,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:24,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 06:34:24,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:24,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 635137405, now seen corresponding path program 1 times [2023-08-04 06:34:24,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:24,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063012441] [2023-08-04 06:34:24,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:24,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:24,457 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 06:34:24,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:24,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063012441] [2023-08-04 06:34:24,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063012441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:24,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:24,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:34:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049463732] [2023-08-04 06:34:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:24,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:34:24,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 06:34:24,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 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 06:34:24,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:24,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 06:34:24,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:27,841 INFO L124 PetriNetUnfolderBase]: 33046/47771 cut-off events. [2023-08-04 06:34:27,841 INFO L125 PetriNetUnfolderBase]: For 1425/1425 co-relation queries the response was YES. [2023-08-04 06:34:27,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93162 conditions, 47771 events. 33046/47771 cut-off events. For 1425/1425 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 334506 event pairs, 26064 based on Foata normal form. 0/45422 useless extension candidates. Maximal degree in co-relation 26554. Up to 43520 conditions per place. [2023-08-04 06:34:28,296 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 06:34:28,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 06:34:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 06:34:28,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841269841269842 [2023-08-04 06:34:28,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 06:34:28,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 06:34:28,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:28,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 06:34:28,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:28,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:28,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:28,304 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 368 transitions. [2023-08-04 06:34:28,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 06:34:28,307 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 06:34:28,308 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 06:34:28,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:28,310 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 06:34:28,311 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 06:34:28,311 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 06:34:28,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:28,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:34:28,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:28,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1304025778, now seen corresponding path program 1 times [2023-08-04 06:34:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:28,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165036348] [2023-08-04 06:34:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:28,366 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 06:34:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165036348] [2023-08-04 06:34:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165036348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:28,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775766429] [2023-08-04 06:34:28,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:28,368 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 06:34:28,395 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 06:34:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:28,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:34:28,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:28,457 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 06:34:28,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:34:28,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775766429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:28,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:34:28,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:34:28,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091715941] [2023-08-04 06:34:28,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:28,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:28,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:28,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 06:34:28,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:28,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:28,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 06:34:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:31,126 INFO L124 PetriNetUnfolderBase]: 31406/44873 cut-off events. [2023-08-04 06:34:31,127 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-08-04 06:34:31,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87754 conditions, 44873 events. 31406/44873 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 1588. Compared 307341 event pairs, 24928 based on Foata normal form. 0/42773 useless extension candidates. Maximal degree in co-relation 87717. Up to 40987 conditions per place. [2023-08-04 06:34:31,331 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 06:34:31,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 06:34:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 06:34:31,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2023-08-04 06:34:31,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 06:34:31,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 06:34:31,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:31,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 06:34:31,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:31,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:31,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:31,337 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 371 transitions. [2023-08-04 06:34:31,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 06:34:31,338 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 06:34:31,338 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 06:34:31,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:31,339 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 06:34:31,339 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 06:34:31,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:31,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:31,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:31,349 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 06:34:31,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:31,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:31,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -226714101, now seen corresponding path program 1 times [2023-08-04 06:34:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535419080] [2023-08-04 06:34:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:31,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:31,593 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 06:34:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535419080] [2023-08-04 06:34:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535419080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96687922] [2023-08-04 06:34:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:31,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:31,595 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 06:34:31,597 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 06:34:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:31,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:34:31,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:31,772 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 06:34:31,773 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:34:31,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96687922] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:31,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:34:31,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:34:31,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256644394] [2023-08-04 06:34:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:31,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:31,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:31,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 210 [2023-08-04 06:34:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 210 [2023-08-04 06:34:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:34,341 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 06:34:34,341 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 06:34:34,438 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 290758 event pairs, 23582 based on Foata normal form. 0/41615 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 06:34:34,584 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 06:34:34,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 06:34:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-04 06:34:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-08-04 06:34:34,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-04 06:34:34,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-04 06:34:34,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:34,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-04 06:34:34,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:34,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:34,594 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:34,594 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 375 transitions. [2023-08-04 06:34:34,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 06:34:34,597 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 06:34:34,598 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 06:34:34,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:34,600 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 06:34:34,600 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 06:34:34,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:34,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:34,601 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 06:34:34,610 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 06:34:34,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:34,810 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:34,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash -274389445, now seen corresponding path program 1 times [2023-08-04 06:34:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:34,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008469042] [2023-08-04 06:34:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:34,860 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 06:34:34,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008469042] [2023-08-04 06:34:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008469042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943619349] [2023-08-04 06:34:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:34,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:34,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:34,863 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 06:34:34,870 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 06:34:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:34,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:34,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:34,958 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 06:34:34,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:34,976 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 06:34:34,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943619349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:34,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:34,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 06:34:34,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231127264] [2023-08-04 06:34:34,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:34,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:34:34,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:34:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:34:34,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 06:34:34,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:34,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:34,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 06:34:34,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:36,996 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 06:34:36,996 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 06:34:37,129 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 1259. Compared 214196 event pairs, 14820 based on Foata normal form. 3/33860 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 06:34:37,435 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 06:34:37,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 06:34:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 06:34:37,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702380952380952 [2023-08-04 06:34:37,437 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 06:34:37,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 06:34:37,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:37,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 06:34:37,438 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 06:34:37,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:37,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:37,440 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 479 transitions. [2023-08-04 06:34:37,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 06:34:37,444 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 06:34:37,445 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 06:34:37,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:37,446 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 06:34:37,446 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 06:34:37,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:37,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:37,446 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 06:34:37,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 06:34:37,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:37,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:37,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash -376891699, now seen corresponding path program 1 times [2023-08-04 06:34:37,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:37,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225076021] [2023-08-04 06:34:37,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:37,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:37,740 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 06:34:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225076021] [2023-08-04 06:34:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225076021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851496845] [2023-08-04 06:34:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:37,742 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 06:34:37,744 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 06:34:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:37,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:37,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:37,824 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 06:34:37,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:37,845 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 06:34:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851496845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:37,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:34:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753043840] [2023-08-04 06:34:37,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:37,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:34:37,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:37,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:34:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:37,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 06:34:37,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:37,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:37,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 06:34:37,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:39,546 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 06:34:39,546 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 06:34:39,595 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 160124 event pairs, 11902 based on Foata normal form. 27/26503 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 06:34:39,677 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 06:34:39,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 06:34:39,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:39,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 06:34:39,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797619047619048 [2023-08-04 06:34:39,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 06:34:39,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 06:34:39,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:39,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 06:34:39,681 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 06:34:39,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:39,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:39,683 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 487 transitions. [2023-08-04 06:34:39,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 06:34:39,687 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 06:34:39,689 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 06:34:39,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:39,690 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 06:34:39,690 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 06:34:39,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:39,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:39,691 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 06:34:39,698 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 06:34:39,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:39,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:39,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1490527575, now seen corresponding path program 1 times [2023-08-04 06:34:39,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:39,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791304554] [2023-08-04 06:34:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:39,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:39,955 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 06:34:39,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:39,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791304554] [2023-08-04 06:34:39,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791304554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:34:39,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067156030] [2023-08-04 06:34:39,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:39,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:34:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:34:39,957 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 06:34:39,984 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 06:34:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:40,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:34:40,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:34:40,070 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 06:34:40,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:34:40,083 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 06:34:40,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067156030] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:34:40,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:34:40,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:34:40,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393549632] [2023-08-04 06:34:40,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:34:40,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:34:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:34:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:34:40,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 210 [2023-08-04 06:34:40,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:40,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:40,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 210 [2023-08-04 06:34:40,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:41,554 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 06:34:41,554 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 06:34:41,601 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 128303 event pairs, 6886 based on Foata normal form. 243/23443 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 06:34:41,660 INFO L140 encePairwiseOnDemand]: 206/210 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 06:34:41,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 06:34:41,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 495 transitions. [2023-08-04 06:34:41,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2023-08-04 06:34:41,662 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 495 transitions. [2023-08-04 06:34:41,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 495 transitions. [2023-08-04 06:34:41,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:41,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 495 transitions. [2023-08-04 06:34:41,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:41,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:41,665 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:41,665 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 495 transitions. [2023-08-04 06:34:41,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 06:34:41,668 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 06:34:41,669 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 06:34:41,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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 06:34:41,670 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 06:34:41,670 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 06:34:41,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:41,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:41,670 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 06:34:41,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 06:34:41,875 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,SelfDestructingSolverStorable10 [2023-08-04 06:34:41,875 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:41,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1194099878, now seen corresponding path program 1 times [2023-08-04 06:34:41,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682834618] [2023-08-04 06:34:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:41,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:42,076 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 06:34:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682834618] [2023-08-04 06:34:42,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682834618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:42,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:42,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 06:34:42,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010679672] [2023-08-04 06:34:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:42,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:34:42,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:42,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:34:42,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:34:42,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:34:42,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:42,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:42,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:34:42,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:48,983 INFO L124 PetriNetUnfolderBase]: 84108/109391 cut-off events. [2023-08-04 06:34:48,984 INFO L125 PetriNetUnfolderBase]: For 51965/51965 co-relation queries the response was YES. [2023-08-04 06:34:49,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246868 conditions, 109391 events. 84108/109391 cut-off events. For 51965/51965 co-relation queries the response was YES. Maximal size of possible extension queue 4048. Compared 665272 event pairs, 34462 based on Foata normal form. 2269/111519 useless extension candidates. Maximal degree in co-relation 246792. Up to 55215 conditions per place. [2023-08-04 06:34:49,576 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 58 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-04 06:34:49,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 432 flow [2023-08-04 06:34:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:34:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:34:49,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 06:34:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825396825396826 [2023-08-04 06:34:49,578 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 06:34:49,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 06:34:49,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:49,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 06:34:49,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:49,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:49,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:49,580 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 367 transitions. [2023-08-04 06:34:49,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 432 flow [2023-08-04 06:34:49,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 74 transitions, 418 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:34:49,705 INFO L231 Difference]: Finished difference. Result has 67 places, 51 transitions, 237 flow [2023-08-04 06:34:49,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, 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=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=51} [2023-08-04 06:34:49,706 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 06:34:49,706 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 51 transitions, 237 flow [2023-08-04 06:34:49,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:49,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:49,706 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 06:34:49,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 06:34:49,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:49,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:49,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1637608683, now seen corresponding path program 1 times [2023-08-04 06:34:49,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:49,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423815355] [2023-08-04 06:34:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:49,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:49,825 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 06:34:49,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:49,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423815355] [2023-08-04 06:34:49,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423815355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:49,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:49,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:34:49,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601689021] [2023-08-04 06:34:49,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:34:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:34:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:34:49,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:34:49,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:49,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:49,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:34:49,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:34:56,710 INFO L124 PetriNetUnfolderBase]: 82762/107113 cut-off events. [2023-08-04 06:34:56,710 INFO L125 PetriNetUnfolderBase]: For 77127/77127 co-relation queries the response was YES. [2023-08-04 06:34:56,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316887 conditions, 107113 events. 82762/107113 cut-off events. For 77127/77127 co-relation queries the response was YES. Maximal size of possible extension queue 3920. Compared 645362 event pairs, 10005 based on Foata normal form. 135/107248 useless extension candidates. Maximal degree in co-relation 186357. Up to 50559 conditions per place. [2023-08-04 06:34:57,318 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 67 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2023-08-04 06:34:57,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 555 flow [2023-08-04 06:34:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:34:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:34:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-08-04 06:34:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2023-08-04 06:34:57,320 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-08-04 06:34:57,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-08-04 06:34:57,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:34:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-08-04 06:34:57,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:57,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:57,323 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:57,323 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 237 flow. Second operand 4 states and 474 transitions. [2023-08-04 06:34:57,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 555 flow [2023-08-04 06:34:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 517 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:34:57,476 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 333 flow [2023-08-04 06:34:57,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-04 06:34:57,477 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-04 06:34:57,477 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 333 flow [2023-08-04 06:34:57,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:57,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:34:57,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:34:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:34:57,478 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:34:57,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:34:57,478 INFO L85 PathProgramCache]: Analyzing trace with hash -773742738, now seen corresponding path program 1 times [2023-08-04 06:34:57,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:34:57,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160335132] [2023-08-04 06:34:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:34:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:34:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:34:57,622 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 06:34:57,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:34:57,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160335132] [2023-08-04 06:34:57,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160335132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:34:57,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:34:57,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:34:57,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501465263] [2023-08-04 06:34:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:34:57,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:34:57,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:34:57,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:34:57,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:34:57,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:34:57,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 333 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:34:57,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:34:57,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:34:57,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:35:04,928 INFO L124 PetriNetUnfolderBase]: 82071/105763 cut-off events. [2023-08-04 06:35:04,929 INFO L125 PetriNetUnfolderBase]: For 143728/143728 co-relation queries the response was YES. [2023-08-04 06:35:05,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346010 conditions, 105763 events. 82071/105763 cut-off events. For 143728/143728 co-relation queries the response was YES. Maximal size of possible extension queue 3897. Compared 628728 event pairs, 21900 based on Foata normal form. 45/105787 useless extension candidates. Maximal degree in co-relation 345923. Up to 53226 conditions per place. [2023-08-04 06:35:05,608 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 91 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2023-08-04 06:35:05,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 944 flow [2023-08-04 06:35:05,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:35:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:35:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2023-08-04 06:35:05,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2023-08-04 06:35:05,610 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2023-08-04 06:35:05,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2023-08-04 06:35:05,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:35:05,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2023-08-04 06:35:05,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:05,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:05,613 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:05,613 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 333 flow. Second operand 4 states and 489 transitions. [2023-08-04 06:35:05,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 944 flow [2023-08-04 06:35:05,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 127 transitions, 944 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:35:05,916 INFO L231 Difference]: Finished difference. Result has 77 places, 83 transitions, 635 flow [2023-08-04 06:35:05,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=635, PETRI_PLACES=77, PETRI_TRANSITIONS=83} [2023-08-04 06:35:05,917 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 26 predicate places. [2023-08-04 06:35:05,917 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 83 transitions, 635 flow [2023-08-04 06:35:05,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:05,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:35:05,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:35:05,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 06:35:05,917 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:35:05,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:35:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2000988467, now seen corresponding path program 1 times [2023-08-04 06:35:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:35:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575716205] [2023-08-04 06:35:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:35:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:35:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:35:06,053 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 06:35:06,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:35:06,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575716205] [2023-08-04 06:35:06,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575716205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:35:06,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:35:06,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:35:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858116772] [2023-08-04 06:35:06,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:35:06,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:35:06,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:35:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:35:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:35:06,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:35:06,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 83 transitions, 635 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:06,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:35:06,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:35:06,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:35:13,747 INFO L124 PetriNetUnfolderBase]: 81127/104381 cut-off events. [2023-08-04 06:35:13,747 INFO L125 PetriNetUnfolderBase]: For 337481/337481 co-relation queries the response was YES. [2023-08-04 06:35:14,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 408474 conditions, 104381 events. 81127/104381 cut-off events. For 337481/337481 co-relation queries the response was YES. Maximal size of possible extension queue 3814. Compared 612129 event pairs, 17028 based on Foata normal form. 120/104482 useless extension candidates. Maximal degree in co-relation 170972. Up to 51743 conditions per place. [2023-08-04 06:35:14,479 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 93 selfloop transitions, 41 changer transitions 0/139 dead transitions. [2023-08-04 06:35:14,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 139 transitions, 1267 flow [2023-08-04 06:35:14,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:35:14,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:35:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2023-08-04 06:35:14,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2023-08-04 06:35:14,481 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2023-08-04 06:35:14,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2023-08-04 06:35:14,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:35:14,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2023-08-04 06:35:14,482 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 06:35:14,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:14,484 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:14,484 INFO L175 Difference]: Start difference. First operand has 77 places, 83 transitions, 635 flow. Second operand 4 states and 484 transitions. [2023-08-04 06:35:14,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 139 transitions, 1267 flow [2023-08-04 06:35:15,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 139 transitions, 1267 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:35:15,104 INFO L231 Difference]: Finished difference. Result has 83 places, 99 transitions, 997 flow [2023-08-04 06:35:15,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=997, PETRI_PLACES=83, PETRI_TRANSITIONS=99} [2023-08-04 06:35:15,104 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2023-08-04 06:35:15,104 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 99 transitions, 997 flow [2023-08-04 06:35:15,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:15,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:35:15,105 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, 1, 1] [2023-08-04 06:35:15,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 06:35:15,105 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:35:15,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:35:15,105 INFO L85 PathProgramCache]: Analyzing trace with hash 624637465, now seen corresponding path program 1 times [2023-08-04 06:35:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:35:15,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897407215] [2023-08-04 06:35:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:35:15,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:35:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:35:15,214 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 06:35:15,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:35:15,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897407215] [2023-08-04 06:35:15,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897407215] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:35:15,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:35:15,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:35:15,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590672156] [2023-08-04 06:35:15,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:35:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:35:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:35:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:35:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:35:15,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 210 [2023-08-04 06:35:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 99 transitions, 997 flow. Second operand has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:35:15,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 210 [2023-08-04 06:35:15,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:35:35,151 INFO L124 PetriNetUnfolderBase]: 181653/236070 cut-off events. [2023-08-04 06:35:35,152 INFO L125 PetriNetUnfolderBase]: For 1225843/1228405 co-relation queries the response was YES. [2023-08-04 06:35:36,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967768 conditions, 236070 events. 181653/236070 cut-off events. For 1225843/1228405 co-relation queries the response was YES. Maximal size of possible extension queue 8601. Compared 1550745 event pairs, 25517 based on Foata normal form. 4863/232865 useless extension candidates. Maximal degree in co-relation 679995. Up to 98837 conditions per place. [2023-08-04 06:35:37,288 INFO L140 encePairwiseOnDemand]: 204/210 looper letters, 147 selfloop transitions, 13 changer transitions 8/191 dead transitions. [2023-08-04 06:35:37,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 191 transitions, 2124 flow [2023-08-04 06:35:37,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:35:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:35:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:35:37,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2023-08-04 06:35:37,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:35:37,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:35:37,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:35:37,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:35:37,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:37,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:37,293 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:37,293 INFO L175 Difference]: Start difference. First operand has 83 places, 99 transitions, 997 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:35:37,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 191 transitions, 2124 flow [2023-08-04 06:35:45,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 191 transitions, 2124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:35:45,591 INFO L231 Difference]: Finished difference. Result has 88 places, 109 transitions, 1162 flow [2023-08-04 06:35:45,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1162, PETRI_PLACES=88, PETRI_TRANSITIONS=109} [2023-08-04 06:35:45,592 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 37 predicate places. [2023-08-04 06:35:45,592 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 109 transitions, 1162 flow [2023-08-04 06:35:45,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:45,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:35:45,592 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 06:35:45,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 06:35:45,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:35:45,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:35:45,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2111127784, now seen corresponding path program 1 times [2023-08-04 06:35:45,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:35:45,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852417157] [2023-08-04 06:35:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:35:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:35:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:35:45,713 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 06:35:45,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:35:45,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852417157] [2023-08-04 06:35:45,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852417157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:35:45,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:35:45,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:35:45,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250455992] [2023-08-04 06:35:45,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:35:45,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:35:45,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:35:45,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:35:45,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:35:45,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:35:45,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 109 transitions, 1162 flow. Second operand has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:35:45,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:35:45,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:35:45,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:36:04,584 INFO L124 PetriNetUnfolderBase]: 152847/200350 cut-off events. [2023-08-04 06:36:04,585 INFO L125 PetriNetUnfolderBase]: For 1145611/1145902 co-relation queries the response was YES. [2023-08-04 06:36:05,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908479 conditions, 200350 events. 152847/200350 cut-off events. For 1145611/1145902 co-relation queries the response was YES. Maximal size of possible extension queue 7118. Compared 1305853 event pairs, 26692 based on Foata normal form. 588/198652 useless extension candidates. Maximal degree in co-relation 485202. Up to 77878 conditions per place. [2023-08-04 06:36:06,436 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 133 selfloop transitions, 43 changer transitions 0/183 dead transitions. [2023-08-04 06:36:06,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 183 transitions, 2276 flow [2023-08-04 06:36:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:36:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:36:06,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-04 06:36:06,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-04 06:36:06,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-04 06:36:06,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-04 06:36:06,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:36:06,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-04 06:36:06,440 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 06:36:06,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:06,442 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:06,442 INFO L175 Difference]: Start difference. First operand has 88 places, 109 transitions, 1162 flow. Second operand 4 states and 476 transitions. [2023-08-04 06:36:06,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 183 transitions, 2276 flow [2023-08-04 06:36:13,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 183 transitions, 2257 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:36:13,081 INFO L231 Difference]: Finished difference. Result has 93 places, 145 transitions, 1925 flow [2023-08-04 06:36:13,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1925, PETRI_PLACES=93, PETRI_TRANSITIONS=145} [2023-08-04 06:36:13,081 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 42 predicate places. [2023-08-04 06:36:13,081 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 145 transitions, 1925 flow [2023-08-04 06:36:13,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.0) internal successors, (424), 4 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:13,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:36:13,082 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 06:36:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 06:36:13,082 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:36:13,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:36:13,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1019779989, now seen corresponding path program 1 times [2023-08-04 06:36:13,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:36:13,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796638044] [2023-08-04 06:36:13,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:36:13,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:36:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:36:13,196 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 06:36:13,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:36:13,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796638044] [2023-08-04 06:36:13,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796638044] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:36:13,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:36:13,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 06:36:13,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669927276] [2023-08-04 06:36:13,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:36:13,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:36:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:36:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:36:13,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:36:13,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 210 [2023-08-04 06:36:13,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 145 transitions, 1925 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:13,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:36:13,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 210 [2023-08-04 06:36:13,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:36:53,324 INFO L124 PetriNetUnfolderBase]: 322031/422505 cut-off events. [2023-08-04 06:36:53,325 INFO L125 PetriNetUnfolderBase]: For 3216991/3217551 co-relation queries the response was YES. [2023-08-04 06:36:55,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058153 conditions, 422505 events. 322031/422505 cut-off events. For 3216991/3217551 co-relation queries the response was YES. Maximal size of possible extension queue 17561. Compared 3038106 event pairs, 47101 based on Foata normal form. 2764/420901 useless extension candidates. Maximal degree in co-relation 2058036. Up to 115928 conditions per place. [2023-08-04 06:36:57,037 INFO L140 encePairwiseOnDemand]: 198/210 looper letters, 180 selfloop transitions, 152 changer transitions 2/341 dead transitions. [2023-08-04 06:36:57,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 341 transitions, 4753 flow [2023-08-04 06:36:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 06:36:57,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 06:36:57,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2023-08-04 06:36:57,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843537414965987 [2023-08-04 06:36:57,039 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2023-08-04 06:36:57,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2023-08-04 06:36:57,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:36:57,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2023-08-04 06:36:57,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:57,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 210.0) internal successors, (1680), 8 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:57,043 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 210.0) internal successors, (1680), 8 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:36:57,043 INFO L175 Difference]: Start difference. First operand has 93 places, 145 transitions, 1925 flow. Second operand 7 states and 859 transitions. [2023-08-04 06:36:57,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 341 transitions, 4753 flow [2023-08-04 06:39:54,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 341 transitions, 4753 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:39:54,531 INFO L231 Difference]: Finished difference. Result has 105 places, 236 transitions, 4149 flow [2023-08-04 06:39:54,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4149, PETRI_PLACES=105, PETRI_TRANSITIONS=236} [2023-08-04 06:39:54,531 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 54 predicate places. [2023-08-04 06:39:54,531 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 236 transitions, 4149 flow [2023-08-04 06:39:54,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:39:54,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:39:54,532 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 06:39:54,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 06:39:54,532 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:39:54,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:39:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1496790385, now seen corresponding path program 2 times [2023-08-04 06:39:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:39:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638255493] [2023-08-04 06:39:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:39:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:39:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:39:54,650 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 06:39:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:39:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638255493] [2023-08-04 06:39:54,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638255493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:39:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183359343] [2023-08-04 06:39:54,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 06:39:54,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:39:54,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:39:54,654 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 06:39:54,655 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 06:39:55,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-04 06:39:55,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 06:39:55,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 06:39:55,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:39:55,318 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 06:39:55,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:39:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183359343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:39:55,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:39:55,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 06:39:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384527098] [2023-08-04 06:39:55,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:39:55,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:39:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:39:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:39:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-04 06:39:55,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 210 [2023-08-04 06:39:55,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 236 transitions, 4149 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:39:55,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:39:55,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 210 [2023-08-04 06:39:55,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand