/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe029_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:07:34,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:07:34,259 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:07:34,263 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:07:34,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:07:34,263 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:07:34,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:07:34,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:07:34,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:07:34,282 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:07:34,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:07:34,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:07:34,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:07:34,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:07:34,284 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:07:34,285 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:07:34,285 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:07:34,285 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:07:34,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:07:34,286 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:07:34,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:07:34,286 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:07:34,287 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:07:34,287 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:07:34,287 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:07:34,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:07:34,288 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:07:34,288 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:07:34,288 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:07:34,288 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:07:34,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:07:34,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:07:34,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:07:34,289 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:07:34,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:07:34,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:07:34,290 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:07:34,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:07:34,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:07:34,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:07:34,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:07:34,491 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:07:34,491 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe029_tso_bound2.i [2023-08-04 01:07:35,672 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:07:35,901 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:07:35,902 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe029_tso_bound2.i [2023-08-04 01:07:35,920 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7174e551a/4011868c5d0f4ea2b363e5567b38501a/FLAG7e2243450 [2023-08-04 01:07:35,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7174e551a/4011868c5d0f4ea2b363e5567b38501a [2023-08-04 01:07:35,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:07:35,935 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:07:35,937 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:07:35,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:07:35,941 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:07:35,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:07:35" (1/1) ... [2023-08-04 01:07:35,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f9a3e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:35, skipping insertion in model container [2023-08-04 01:07:35,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:07:35" (1/1) ... [2023-08-04 01:07:35,988 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:07:36,110 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_safe029_tso_bound2.i[945,958] [2023-08-04 01:07:36,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:07:36,224 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:07:36,235 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_safe029_tso_bound2.i[945,958] [2023-08-04 01:07:36,243 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:07:36,257 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:07:36,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:07:36,308 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:07:36,308 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:07:36,314 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:07:36,316 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36 WrapperNode [2023-08-04 01:07:36,317 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:07:36,318 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:07:36,318 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:07:36,318 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:07:36,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,343 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,366 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-08-04 01:07:36,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:07:36,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:07:36,367 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:07:36,367 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:07:36,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,387 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,399 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:07:36,407 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:07:36,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:07:36,407 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:07:36,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (1/1) ... [2023-08-04 01:07:36,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:07:36,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:36,446 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 01:07:36,477 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 01:07:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:07:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:07:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:07:36,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:07:36,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:07:36,497 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:07:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:07:36,497 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:07:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:07:36,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:07:36,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:07:36,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:07:36,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:07:36,499 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 01:07:36,619 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:07:36,620 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:07:36,748 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:07:36,753 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:07:36,754 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 01:07:36,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:07:36 BoogieIcfgContainer [2023-08-04 01:07:36,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:07:36,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:07:36,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:07:36,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:07:36,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:07:35" (1/3) ... [2023-08-04 01:07:36,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d53f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:07:36, skipping insertion in model container [2023-08-04 01:07:36,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:07:36" (2/3) ... [2023-08-04 01:07:36,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d53f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:07:36, skipping insertion in model container [2023-08-04 01:07:36,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:07:36" (3/3) ... [2023-08-04 01:07:36,763 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe029_tso_bound2.i [2023-08-04 01:07:36,770 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:07:36,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:07:36,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:07:36,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:07:36,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:07:36,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 01:07:36,948 INFO L124 PetriNetUnfolderBase]: 14/191 cut-off events. [2023-08-04 01:07:36,948 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:07:36,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 191 events. 14/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 561 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2023-08-04 01:07:36,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 170 flow [2023-08-04 01:07:36,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 118 flow [2023-08-04 01:07:36,961 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:07:36,968 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 58 places, 54 transitions, 118 flow [2023-08-04 01:07:36,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 58 places, 54 transitions, 118 flow [2023-08-04 01:07:36,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 54 transitions, 118 flow [2023-08-04 01:07:36,988 INFO L124 PetriNetUnfolderBase]: 2/87 cut-off events. [2023-08-04 01:07:36,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:07:36,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 87 events. 2/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-08-04 01:07:36,989 INFO L119 LiptonReduction]: Number of co-enabled transitions 492 [2023-08-04 01:07:38,294 INFO L134 LiptonReduction]: Checked pairs total: 924 [2023-08-04 01:07:38,295 INFO L136 LiptonReduction]: Total number of compositions: 43 [2023-08-04 01:07:38,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:07:38,312 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;@715628e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:07:38,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:07:38,317 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:07:38,317 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 01:07:38,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:07:38,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:38,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 01:07:38,318 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:38,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash 261348769, now seen corresponding path program 1 times [2023-08-04 01:07:38,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541684979] [2023-08-04 01:07:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:38,553 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 01:07:38,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:38,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541684979] [2023-08-04 01:07:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541684979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:38,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881787645] [2023-08-04 01:07:38,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:38,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:38,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:38,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 123 [2023-08-04 01:07:38,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:38,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:38,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 123 [2023-08-04 01:07:38,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:38,667 INFO L124 PetriNetUnfolderBase]: 24/69 cut-off events. [2023-08-04 01:07:38,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:07:38,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 69 events. 24/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 219 event pairs, 6 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 125. Up to 52 conditions per place. [2023-08-04 01:07:38,671 INFO L140 encePairwiseOnDemand]: 120/123 looper letters, 12 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-04 01:07:38,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 74 flow [2023-08-04 01:07:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-08-04 01:07:38,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2023-08-04 01:07:38,689 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-08-04 01:07:38,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-08-04 01:07:38,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:38,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-08-04 01:07:38,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:38,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:38,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:38,705 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 40 flow. Second operand 3 states and 222 transitions. [2023-08-04 01:07:38,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 74 flow [2023-08-04 01:07:38,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:07:38,710 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 48 flow [2023-08-04 01:07:38,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=123, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-04 01:07:38,715 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-04 01:07:38,715 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 48 flow [2023-08-04 01:07:38,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:38,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:38,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:07:38,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:07:38,716 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:38,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash -496495717, now seen corresponding path program 1 times [2023-08-04 01:07:38,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:38,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055137760] [2023-08-04 01:07:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:38,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:07:38,756 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:07:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:07:38,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:07:38,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:07:38,806 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:07:38,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:07:38,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:07:38,808 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 01:07:38,809 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:07:38,810 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:07:38,810 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:07:38,833 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:07:38,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 212 flow [2023-08-04 01:07:38,915 INFO L124 PetriNetUnfolderBase]: 30/410 cut-off events. [2023-08-04 01:07:38,915 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:07:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 410 events. 30/410 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1730 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 294. Up to 18 conditions per place. [2023-08-04 01:07:38,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 212 flow [2023-08-04 01:07:38,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 68 transitions, 160 flow [2023-08-04 01:07:38,921 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:07:38,921 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 68 transitions, 160 flow [2023-08-04 01:07:38,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 68 transitions, 160 flow [2023-08-04 01:07:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 68 transitions, 160 flow [2023-08-04 01:07:38,938 INFO L124 PetriNetUnfolderBase]: 3/176 cut-off events. [2023-08-04 01:07:38,938 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:07:38,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 176 events. 3/176 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 441 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 138. Up to 9 conditions per place. [2023-08-04 01:07:38,942 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-04 01:07:40,180 INFO L134 LiptonReduction]: Checked pairs total: 3088 [2023-08-04 01:07:40,180 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-04 01:07:40,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:07:40,183 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;@715628e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:07:40,183 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:07:40,194 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:07:40,194 INFO L124 PetriNetUnfolderBase]: 0/32 cut-off events. [2023-08-04 01:07:40,194 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 01:07:40,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:40,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:07:40,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:40,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:40,195 INFO L85 PathProgramCache]: Analyzing trace with hash 268107327, now seen corresponding path program 1 times [2023-08-04 01:07:40,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:40,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320125433] [2023-08-04 01:07:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:40,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:40,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:40,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320125433] [2023-08-04 01:07:40,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320125433] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:40,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:40,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:40,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991015535] [2023-08-04 01:07:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:40,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:40,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:40,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:40,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 141 [2023-08-04 01:07:40,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:40,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 141 [2023-08-04 01:07:40,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:40,416 INFO L124 PetriNetUnfolderBase]: 624/1162 cut-off events. [2023-08-04 01:07:40,416 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 01:07:40,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 1162 events. 624/1162 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6598 event pairs, 402 based on Foata normal form. 0/1140 useless extension candidates. Maximal degree in co-relation 664. Up to 958 conditions per place. [2023-08-04 01:07:40,424 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 01:07:40,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 124 flow [2023-08-04 01:07:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-04 01:07:40,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264775413711584 [2023-08-04 01:07:40,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-04 01:07:40,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-04 01:07:40,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:40,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-04 01:07:40,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,434 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,434 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 265 transitions. [2023-08-04 01:07:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 124 flow [2023-08-04 01:07:40,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 120 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 01:07:40,436 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 82 flow [2023-08-04 01:07:40,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 01:07:40,437 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 01:07:40,437 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 82 flow [2023-08-04 01:07:40,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:40,437 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:07:40,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:07:40,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:40,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:40,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1368842485, now seen corresponding path program 1 times [2023-08-04 01:07:40,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:40,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417795562] [2023-08-04 01:07:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:07:40,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:40,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417795562] [2023-08-04 01:07:40,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417795562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:40,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211761112] [2023-08-04 01:07:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:40,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:40,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:40,533 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 01:07:40,568 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 01:07:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:40,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:07:40,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:07:40,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:07:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211761112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:40,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:07:40,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:07:40,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172515174] [2023-08-04 01:07:40,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:40,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:07:40,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:07:40,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:07:40,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 141 [2023-08-04 01:07:40,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:40,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 141 [2023-08-04 01:07:40,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:40,809 INFO L124 PetriNetUnfolderBase]: 612/1129 cut-off events. [2023-08-04 01:07:40,810 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 01:07:40,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2285 conditions, 1129 events. 612/1129 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6437 event pairs, 240 based on Foata normal form. 9/1137 useless extension candidates. Maximal degree in co-relation 823. Up to 911 conditions per place. [2023-08-04 01:07:40,817 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 22 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2023-08-04 01:07:40,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 148 flow [2023-08-04 01:07:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:07:40,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:07:40,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 427 transitions. [2023-08-04 01:07:40,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056737588652482 [2023-08-04 01:07:40,820 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 427 transitions. [2023-08-04 01:07:40,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 427 transitions. [2023-08-04 01:07:40,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:40,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 427 transitions. [2023-08-04 01:07:40,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.4) internal successors, (427), 5 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,824 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 82 flow. Second operand 5 states and 427 transitions. [2023-08-04 01:07:40,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 148 flow [2023-08-04 01:07:40,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:07:40,825 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 96 flow [2023-08-04 01:07:40,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-04 01:07:40,826 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 6 predicate places. [2023-08-04 01:07:40,826 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 96 flow [2023-08-04 01:07:40,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:40,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:40,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:40,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:07:41,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:41,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:41,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:41,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1080490608, now seen corresponding path program 1 times [2023-08-04 01:07:41,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970250666] [2023-08-04 01:07:41,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:41,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:41,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970250666] [2023-08-04 01:07:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970250666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:41,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077474691] [2023-08-04 01:07:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:41,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:41,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:41,095 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 01:07:41,098 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 01:07:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:41,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:41,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:41,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077474691] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:41,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:07:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782750239] [2023-08-04 01:07:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:41,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:07:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:41,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:07:41,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:07:41,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 141 [2023-08-04 01:07:41,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:41,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 141 [2023-08-04 01:07:41,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:41,341 INFO L124 PetriNetUnfolderBase]: 502/899 cut-off events. [2023-08-04 01:07:41,342 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 01:07:41,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1858 conditions, 899 events. 502/899 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4668 event pairs, 180 based on Foata normal form. 3/901 useless extension candidates. Maximal degree in co-relation 651. Up to 727 conditions per place. [2023-08-04 01:07:41,347 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 22 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 01:07:41,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 154 flow [2023-08-04 01:07:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:41,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2023-08-04 01:07:41,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6134751773049646 [2023-08-04 01:07:41,350 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2023-08-04 01:07:41,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2023-08-04 01:07:41,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:41,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2023-08-04 01:07:41,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.5) internal successors, (346), 4 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,353 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 96 flow. Second operand 4 states and 346 transitions. [2023-08-04 01:07:41,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 154 flow [2023-08-04 01:07:41,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 32 transitions, 149 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:07:41,356 INFO L231 Difference]: Finished difference. Result has 41 places, 25 transitions, 89 flow [2023-08-04 01:07:41,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=41, PETRI_TRANSITIONS=25} [2023-08-04 01:07:41,357 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-08-04 01:07:41,357 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 25 transitions, 89 flow [2023-08-04 01:07:41,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:41,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:41,364 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 01:07:41,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:41,564 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:07:41,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1173608222, now seen corresponding path program 1 times [2023-08-04 01:07:41,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:41,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415882407] [2023-08-04 01:07:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:07:41,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:41,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415882407] [2023-08-04 01:07:41,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415882407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:41,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:41,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:07:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749288926] [2023-08-04 01:07:41,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:41,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:07:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:07:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:07:41,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 141 [2023-08-04 01:07:41,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 25 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:41,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 141 [2023-08-04 01:07:41,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:41,732 INFO L124 PetriNetUnfolderBase]: 286/544 cut-off events. [2023-08-04 01:07:41,733 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 01:07:41,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1182 conditions, 544 events. 286/544 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2546 event pairs, 22 based on Foata normal form. 81/624 useless extension candidates. Maximal degree in co-relation 552. Up to 324 conditions per place. [2023-08-04 01:07:41,734 INFO L140 encePairwiseOnDemand]: 139/141 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 01:07:41,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 34 transitions, 161 flow [2023-08-04 01:07:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:41,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-08-04 01:07:41,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624113475177305 [2023-08-04 01:07:41,736 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-08-04 01:07:41,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-08-04 01:07:41,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:41,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-08-04 01:07:41,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,739 INFO L175 Difference]: Start difference. First operand has 41 places, 25 transitions, 89 flow. Second operand 4 states and 352 transitions. [2023-08-04 01:07:41,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 34 transitions, 161 flow [2023-08-04 01:07:41,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:07:41,741 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-04 01:07:41,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-04 01:07:41,742 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2023-08-04 01:07:41,742 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-04 01:07:41,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:41,742 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:07:41,743 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:07:41,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:07:41,743 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:07:41,743 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:07:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 212 flow [2023-08-04 01:07:41,769 INFO L124 PetriNetUnfolderBase]: 30/410 cut-off events. [2023-08-04 01:07:41,769 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:07:41,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 410 events. 30/410 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1730 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 294. Up to 18 conditions per place. [2023-08-04 01:07:41,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 212 flow [2023-08-04 01:07:41,771 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 82 transitions, 180 flow [2023-08-04 01:07:41,771 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:07:41,771 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 82 transitions, 180 flow [2023-08-04 01:07:41,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 82 transitions, 180 flow [2023-08-04 01:07:41,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 82 transitions, 180 flow [2023-08-04 01:07:41,789 INFO L124 PetriNetUnfolderBase]: 21/316 cut-off events. [2023-08-04 01:07:41,789 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 01:07:41,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 316 events. 21/316 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1168 event pairs, 0 based on Foata normal form. 0/283 useless extension candidates. Maximal degree in co-relation 231. Up to 18 conditions per place. [2023-08-04 01:07:41,792 INFO L119 LiptonReduction]: Number of co-enabled transitions 2016 [2023-08-04 01:07:43,204 INFO L134 LiptonReduction]: Checked pairs total: 4295 [2023-08-04 01:07:43,205 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-04 01:07:43,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:07:43,206 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;@715628e7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:07:43,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:07:43,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:07:43,209 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-04 01:07:43,210 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:07:43,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:43,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 01:07:43,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:43,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash 15162745, now seen corresponding path program 1 times [2023-08-04 01:07:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:43,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447031902] [2023-08-04 01:07:43,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:43,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:43,232 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 01:07:43,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:43,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447031902] [2023-08-04 01:07:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447031902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:43,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:43,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721288824] [2023-08-04 01:07:43,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:43,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:43,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:43,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 158 [2023-08-04 01:07:43,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:43,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 158 [2023-08-04 01:07:43,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:43,422 INFO L124 PetriNetUnfolderBase]: 1674/2803 cut-off events. [2023-08-04 01:07:43,422 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 01:07:43,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5432 conditions, 2803 events. 1674/2803 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16458 event pairs, 1140 based on Foata normal form. 0/2616 useless extension candidates. Maximal degree in co-relation 1555. Up to 2476 conditions per place. [2023-08-04 01:07:43,437 INFO L140 encePairwiseOnDemand]: 154/158 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2023-08-04 01:07:43,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 124 flow [2023-08-04 01:07:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-04 01:07:43,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675105485232067 [2023-08-04 01:07:43,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-04 01:07:43,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-04 01:07:43,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:43,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-04 01:07:43,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,441 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 70 flow. Second operand 3 states and 269 transitions. [2023-08-04 01:07:43,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 124 flow [2023-08-04 01:07:43,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:07:43,442 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 80 flow [2023-08-04 01:07:43,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 01:07:43,443 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 01:07:43,443 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 80 flow [2023-08-04 01:07:43,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:43,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 01:07:43,444 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:43,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1008086879, now seen corresponding path program 1 times [2023-08-04 01:07:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:43,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906376537] [2023-08-04 01:07:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:43,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:43,476 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 01:07:43,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906376537] [2023-08-04 01:07:43,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906376537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:43,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261577089] [2023-08-04 01:07:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:43,479 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 01:07:43,506 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 01:07:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:43,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:07:43,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:43,559 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 01:07:43,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:07:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261577089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:43,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:07:43,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:07:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297921575] [2023-08-04 01:07:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:43,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:07:43,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 158 [2023-08-04 01:07:43,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:43,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 158 [2023-08-04 01:07:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:43,766 INFO L124 PetriNetUnfolderBase]: 1646/2693 cut-off events. [2023-08-04 01:07:43,767 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 01:07:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 2693 events. 1646/2693 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15534 event pairs, 1120 based on Foata normal form. 0/2548 useless extension candidates. Maximal degree in co-relation 5265. Up to 2299 conditions per place. [2023-08-04 01:07:43,781 INFO L140 encePairwiseOnDemand]: 155/158 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-04 01:07:43,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 154 flow [2023-08-04 01:07:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2023-08-04 01:07:43,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5738396624472574 [2023-08-04 01:07:43,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2023-08-04 01:07:43,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2023-08-04 01:07:43,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:43,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2023-08-04 01:07:43,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,785 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 80 flow. Second operand 3 states and 272 transitions. [2023-08-04 01:07:43,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 154 flow [2023-08-04 01:07:43,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:43,789 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 90 flow [2023-08-04 01:07:43,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-04 01:07:43,790 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2023-08-04 01:07:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 90 flow [2023-08-04 01:07:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:43,798 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 01:07:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:43,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:43,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:43,996 INFO L85 PathProgramCache]: Analyzing trace with hash 587660001, now seen corresponding path program 1 times [2023-08-04 01:07:43,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:43,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761451993] [2023-08-04 01:07:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:43,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:44,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:44,052 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 01:07:44,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:44,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761451993] [2023-08-04 01:07:44,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761451993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:44,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229289615] [2023-08-04 01:07:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:44,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:44,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:44,054 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 01:07:44,081 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 01:07:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:44,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:44,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:44,142 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 01:07:44,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:44,162 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 01:07:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229289615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:44,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:44,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:07:44,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049735752] [2023-08-04 01:07:44,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:44,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:07:44,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:44,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:07:44,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:07:44,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-04 01:07:44,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:44,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-04 01:07:44,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:44,379 INFO L124 PetriNetUnfolderBase]: 1336/2141 cut-off events. [2023-08-04 01:07:44,380 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-08-04 01:07:44,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4466 conditions, 2141 events. 1336/2141 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11390 event pairs, 564 based on Foata normal form. 3/2143 useless extension candidates. Maximal degree in co-relation 1599. Up to 1882 conditions per place. [2023-08-04 01:07:44,392 INFO L140 encePairwiseOnDemand]: 154/158 looper letters, 26 selfloop transitions, 3 changer transitions 1/36 dead transitions. [2023-08-04 01:07:44,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 166 flow [2023-08-04 01:07:44,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 350 transitions. [2023-08-04 01:07:44,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537974683544303 [2023-08-04 01:07:44,394 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 350 transitions. [2023-08-04 01:07:44,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 350 transitions. [2023-08-04 01:07:44,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:44,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 350 transitions. [2023-08-04 01:07:44,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,397 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 90 flow. Second operand 4 states and 350 transitions. [2023-08-04 01:07:44,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 166 flow [2023-08-04 01:07:44,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 36 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:44,398 INFO L231 Difference]: Finished difference. Result has 44 places, 28 transitions, 102 flow [2023-08-04 01:07:44,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=44, PETRI_TRANSITIONS=28} [2023-08-04 01:07:44,399 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 9 predicate places. [2023-08-04 01:07:44,399 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 28 transitions, 102 flow [2023-08-04 01:07:44,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.8) internal successors, (414), 5 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:44,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:44,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 01:07:44,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:44,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:44,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:44,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1595853016, now seen corresponding path program 1 times [2023-08-04 01:07:44,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:44,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921381467] [2023-08-04 01:07:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:44,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:07:44,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921381467] [2023-08-04 01:07:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921381467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:44,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512452614] [2023-08-04 01:07:44,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:44,650 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 01:07:44,657 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 01:07:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:44,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:44,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:07:44,743 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:07:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512452614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:44,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:44,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:07:44,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096556756] [2023-08-04 01:07:44,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:44,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:07:44,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:44,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:07:44,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:07:44,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-04 01:07:44,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 28 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:44,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-04 01:07:44,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:44,955 INFO L124 PetriNetUnfolderBase]: 1216/1861 cut-off events. [2023-08-04 01:07:44,955 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 01:07:44,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3986 conditions, 1861 events. 1216/1861 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 9160 event pairs, 400 based on Foata normal form. 27/1887 useless extension candidates. Maximal degree in co-relation 1421. Up to 943 conditions per place. [2023-08-04 01:07:44,965 INFO L140 encePairwiseOnDemand]: 154/158 looper letters, 34 selfloop transitions, 3 changer transitions 1/44 dead transitions. [2023-08-04 01:07:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 210 flow [2023-08-04 01:07:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:44,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2023-08-04 01:07:44,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664556962025317 [2023-08-04 01:07:44,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 358 transitions. [2023-08-04 01:07:44,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 358 transitions. [2023-08-04 01:07:44,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:44,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 358 transitions. [2023-08-04 01:07:44,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,970 INFO L175 Difference]: Start difference. First operand has 44 places, 28 transitions, 102 flow. Second operand 4 states and 358 transitions. [2023-08-04 01:07:44,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 210 flow [2023-08-04 01:07:44,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 203 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:07:44,972 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 109 flow [2023-08-04 01:07:44,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 01:07:44,973 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2023-08-04 01:07:44,973 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 109 flow [2023-08-04 01:07:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.0) internal successors, (415), 5 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:44,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:44,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:44,983 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 01:07:45,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 01:07:45,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:45,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1364712809, now seen corresponding path program 1 times [2023-08-04 01:07:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:45,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964061695] [2023-08-04 01:07:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:07:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964061695] [2023-08-04 01:07:45,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964061695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:45,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:45,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 01:07:45,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419784738] [2023-08-04 01:07:45,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:45,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:45,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:45,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:45,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2023-08-04 01:07:45,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:45,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:45,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2023-08-04 01:07:45,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:45,823 INFO L124 PetriNetUnfolderBase]: 5149/7262 cut-off events. [2023-08-04 01:07:45,823 INFO L125 PetriNetUnfolderBase]: For 4711/4711 co-relation queries the response was YES. [2023-08-04 01:07:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17313 conditions, 7262 events. 5149/7262 cut-off events. For 4711/4711 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 36353 event pairs, 2398 based on Foata normal form. 241/7499 useless extension candidates. Maximal degree in co-relation 10029. Up to 4143 conditions per place. [2023-08-04 01:07:45,877 INFO L140 encePairwiseOnDemand]: 148/158 looper letters, 40 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2023-08-04 01:07:45,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 300 flow [2023-08-04 01:07:45,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-04 01:07:45,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5717299578059072 [2023-08-04 01:07:45,879 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-04 01:07:45,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-04 01:07:45,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:45,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-04 01:07:45,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:45,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:45,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:45,881 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 109 flow. Second operand 3 states and 271 transitions. [2023-08-04 01:07:45,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 300 flow [2023-08-04 01:07:45,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 286 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 01:07:45,887 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 172 flow [2023-08-04 01:07:45,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-04 01:07:45,888 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 12 predicate places. [2023-08-04 01:07:45,888 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 172 flow [2023-08-04 01:07:45,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:45,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:45,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:45,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 01:07:45,889 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:45,889 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:45,889 INFO L85 PathProgramCache]: Analyzing trace with hash -643576879, now seen corresponding path program 1 times [2023-08-04 01:07:45,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:45,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386067578] [2023-08-04 01:07:45,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:45,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:07:46,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386067578] [2023-08-04 01:07:46,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386067578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:46,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:46,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:46,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656690725] [2023-08-04 01:07:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:07:46,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:07:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:07:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 158 [2023-08-04 01:07:46,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:46,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 158 [2023-08-04 01:07:46,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:46,555 INFO L124 PetriNetUnfolderBase]: 5117/7156 cut-off events. [2023-08-04 01:07:46,555 INFO L125 PetriNetUnfolderBase]: For 5846/5846 co-relation queries the response was YES. [2023-08-04 01:07:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 7156 events. 5117/7156 cut-off events. For 5846/5846 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 35909 event pairs, 886 based on Foata normal form. 3/7157 useless extension candidates. Maximal degree in co-relation 15396. Up to 4116 conditions per place. [2023-08-04 01:07:46,589 INFO L140 encePairwiseOnDemand]: 148/158 looper letters, 52 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2023-08-04 01:07:46,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 474 flow [2023-08-04 01:07:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2023-08-04 01:07:46,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680379746835443 [2023-08-04 01:07:46,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2023-08-04 01:07:46,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2023-08-04 01:07:46,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:46,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2023-08-04 01:07:46,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,594 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,594 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 172 flow. Second operand 4 states and 359 transitions. [2023-08-04 01:07:46,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 474 flow [2023-08-04 01:07:46,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 444 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:07:46,603 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 243 flow [2023-08-04 01:07:46,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-08-04 01:07:46,604 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2023-08-04 01:07:46,604 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 243 flow [2023-08-04 01:07:46,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.25) internal successors, (313), 4 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:46,605 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:46,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 01:07:46,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:46,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash -643577158, now seen corresponding path program 1 times [2023-08-04 01:07:46,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242684289] [2023-08-04 01:07:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:07:46,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:46,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242684289] [2023-08-04 01:07:46,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242684289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:46,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:46,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 01:07:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841390117] [2023-08-04 01:07:46,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:46,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:46,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-04 01:07:46,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:46,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:46,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-04 01:07:46,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:47,132 INFO L124 PetriNetUnfolderBase]: 4479/6477 cut-off events. [2023-08-04 01:07:47,132 INFO L125 PetriNetUnfolderBase]: For 7287/7287 co-relation queries the response was YES. [2023-08-04 01:07:47,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21197 conditions, 6477 events. 4479/6477 cut-off events. For 7287/7287 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34553 event pairs, 1578 based on Foata normal form. 3/6427 useless extension candidates. Maximal degree in co-relation 21105. Up to 5683 conditions per place. [2023-08-04 01:07:47,176 INFO L140 encePairwiseOnDemand]: 152/158 looper letters, 46 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2023-08-04 01:07:47,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 445 flow [2023-08-04 01:07:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-04 01:07:47,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5864978902953587 [2023-08-04 01:07:47,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-04 01:07:47,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-04 01:07:47,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:47,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-04 01:07:47,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,181 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 243 flow. Second operand 3 states and 278 transitions. [2023-08-04 01:07:47,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 445 flow [2023-08-04 01:07:47,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 445 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:07:47,189 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 296 flow [2023-08-04 01:07:47,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2023-08-04 01:07:47,191 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2023-08-04 01:07:47,191 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 296 flow [2023-08-04 01:07:47,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:47,191 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:47,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 01:07:47,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:47,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1523951954, now seen corresponding path program 1 times [2023-08-04 01:07:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:47,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050893407] [2023-08-04 01:07:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:07:47,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:47,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050893407] [2023-08-04 01:07:47,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050893407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:47,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:47,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:47,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35459010] [2023-08-04 01:07:47,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:47,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:47,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:47,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:47,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:47,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-04 01:07:47,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:47,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-04 01:07:47,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:47,630 INFO L124 PetriNetUnfolderBase]: 2660/4174 cut-off events. [2023-08-04 01:07:47,630 INFO L125 PetriNetUnfolderBase]: For 6500/6707 co-relation queries the response was YES. [2023-08-04 01:07:47,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14174 conditions, 4174 events. 2660/4174 cut-off events. For 6500/6707 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23955 event pairs, 409 based on Foata normal form. 116/4237 useless extension candidates. Maximal degree in co-relation 8914. Up to 2933 conditions per place. [2023-08-04 01:07:47,662 INFO L140 encePairwiseOnDemand]: 152/158 looper letters, 51 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2023-08-04 01:07:47,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 524 flow [2023-08-04 01:07:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-04 01:07:47,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5843881856540084 [2023-08-04 01:07:47,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-04 01:07:47,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-04 01:07:47,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:47,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-04 01:07:47,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,666 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 296 flow. Second operand 3 states and 277 transitions. [2023-08-04 01:07:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 524 flow [2023-08-04 01:07:47,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 497 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:07:47,673 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 306 flow [2023-08-04 01:07:47,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-04 01:07:47,673 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2023-08-04 01:07:47,674 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 306 flow [2023-08-04 01:07:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:47,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:47,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 01:07:47,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:47,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1914971809, now seen corresponding path program 1 times [2023-08-04 01:07:47,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693999738] [2023-08-04 01:07:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:07:47,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:47,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693999738] [2023-08-04 01:07:47,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693999738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:07:47,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:07:47,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:07:47,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769800914] [2023-08-04 01:07:47,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:07:47,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:07:47,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:07:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:07:47,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 158 [2023-08-04 01:07:47,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:47,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:47,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 158 [2023-08-04 01:07:47,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:48,283 INFO L124 PetriNetUnfolderBase]: 4907/7382 cut-off events. [2023-08-04 01:07:48,284 INFO L125 PetriNetUnfolderBase]: For 10784/10952 co-relation queries the response was YES. [2023-08-04 01:07:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26839 conditions, 7382 events. 4907/7382 cut-off events. For 10784/10952 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42966 event pairs, 1210 based on Foata normal form. 54/7295 useless extension candidates. Maximal degree in co-relation 18365. Up to 3348 conditions per place. [2023-08-04 01:07:48,332 INFO L140 encePairwiseOnDemand]: 153/158 looper letters, 63 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2023-08-04 01:07:48,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 81 transitions, 608 flow [2023-08-04 01:07:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-04 01:07:48,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5949367088607594 [2023-08-04 01:07:48,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-04 01:07:48,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-04 01:07:48,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:48,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-04 01:07:48,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:48,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:48,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:48,336 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 306 flow. Second operand 3 states and 282 transitions. [2023-08-04 01:07:48,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 81 transitions, 608 flow [2023-08-04 01:07:48,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 599 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:48,344 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 403 flow [2023-08-04 01:07:48,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=403, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-04 01:07:48,345 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 22 predicate places. [2023-08-04 01:07:48,345 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 403 flow [2023-08-04 01:07:48,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:48,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:48,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:48,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 01:07:48,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:48,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:48,346 INFO L85 PathProgramCache]: Analyzing trace with hash 459114569, now seen corresponding path program 1 times [2023-08-04 01:07:48,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:48,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349974991] [2023-08-04 01:07:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:48,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 01:07:48,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349974991] [2023-08-04 01:07:48,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349974991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:48,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498685091] [2023-08-04 01:07:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:48,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:48,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:48,434 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 01:07:48,436 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 01:07:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:48,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-04 01:07:48,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:48,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:07:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498685091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:48,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:48,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 5] total 10 [2023-08-04 01:07:48,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492432368] [2023-08-04 01:07:48,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:48,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 01:07:48,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 01:07:48,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-08-04 01:07:48,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 158 [2023-08-04 01:07:48,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 403 flow. Second operand has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:48,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:48,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 158 [2023-08-04 01:07:48,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:49,562 INFO L124 PetriNetUnfolderBase]: 5912/8633 cut-off events. [2023-08-04 01:07:49,562 INFO L125 PetriNetUnfolderBase]: For 20975/20975 co-relation queries the response was YES. [2023-08-04 01:07:49,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34247 conditions, 8633 events. 5912/8633 cut-off events. For 20975/20975 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 49977 event pairs, 229 based on Foata normal form. 398/9029 useless extension candidates. Maximal degree in co-relation 34126. Up to 2906 conditions per place. [2023-08-04 01:07:49,610 INFO L140 encePairwiseOnDemand]: 143/158 looper letters, 152 selfloop transitions, 81 changer transitions 18/253 dead transitions. [2023-08-04 01:07:49,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 253 transitions, 2165 flow [2023-08-04 01:07:49,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-04 01:07:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-04 01:07:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 868 transitions. [2023-08-04 01:07:49,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549367088607595 [2023-08-04 01:07:49,613 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 868 transitions. [2023-08-04 01:07:49,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 868 transitions. [2023-08-04 01:07:49,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:49,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 868 transitions. [2023-08-04 01:07:49,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 86.8) internal successors, (868), 10 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,618 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,618 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 403 flow. Second operand 10 states and 868 transitions. [2023-08-04 01:07:49,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 253 transitions, 2165 flow [2023-08-04 01:07:49,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 253 transitions, 2053 flow, removed 12 selfloop flow, removed 2 redundant places. [2023-08-04 01:07:49,641 INFO L231 Difference]: Finished difference. Result has 73 places, 130 transitions, 1239 flow [2023-08-04 01:07:49,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1239, PETRI_PLACES=73, PETRI_TRANSITIONS=130} [2023-08-04 01:07:49,642 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 38 predicate places. [2023-08-04 01:07:49,642 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 130 transitions, 1239 flow [2023-08-04 01:07:49,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:49,643 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:49,649 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 01:07:49,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 01:07:49,849 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:49,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 435864842, now seen corresponding path program 1 times [2023-08-04 01:07:49,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:49,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389130765] [2023-08-04 01:07:49,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:49,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:07:49,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:07:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:07:49,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:07:49,920 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:07:49,920 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 01:07:49,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 01:07:49,920 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:07:49,921 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-04 01:07:49,923 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 01:07:49,923 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 01:07:49,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 01:07:49 BasicIcfg [2023-08-04 01:07:49,989 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 01:07:49,990 INFO L158 Benchmark]: Toolchain (without parser) took 14054.45ms. Allocated memory was 507.5MB in the beginning and 811.6MB in the end (delta: 304.1MB). Free memory was 459.4MB in the beginning and 513.1MB in the end (delta: -53.7MB). Peak memory consumption was 249.0MB. Max. memory is 16.0GB. [2023-08-04 01:07:49,990 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 304.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:07:49,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.51ms. Allocated memory is still 507.5MB. Free memory was 459.1MB in the beginning and 439.2MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 01:07:49,990 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.75ms. Allocated memory is still 507.5MB. Free memory was 439.2MB in the beginning and 437.0MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:07:49,991 INFO L158 Benchmark]: Boogie Preprocessor took 39.06ms. Allocated memory is still 507.5MB. Free memory was 437.0MB in the beginning and 435.6MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 01:07:49,991 INFO L158 Benchmark]: RCFGBuilder took 348.78ms. Allocated memory is still 507.5MB. Free memory was 435.6MB in the beginning and 422.3MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 01:07:49,991 INFO L158 Benchmark]: TraceAbstraction took 13231.54ms. Allocated memory was 507.5MB in the beginning and 811.6MB in the end (delta: 304.1MB). Free memory was 421.6MB in the beginning and 513.1MB in the end (delta: -91.4MB). Peak memory consumption was 211.2MB. Max. memory is 16.0GB. [2023-08-04 01:07:49,992 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory is still 304.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 380.51ms. Allocated memory is still 507.5MB. Free memory was 459.1MB in the beginning and 439.2MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.75ms. Allocated memory is still 507.5MB. Free memory was 439.2MB in the beginning and 437.0MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 39.06ms. Allocated memory is still 507.5MB. Free memory was 437.0MB in the beginning and 435.6MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * RCFGBuilder took 348.78ms. Allocated memory is still 507.5MB. Free memory was 435.6MB in the beginning and 422.3MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 13231.54ms. Allocated memory was 507.5MB in the beginning and 811.6MB in the end (delta: 304.1MB). Free memory was 421.6MB in the beginning and 513.1MB in the end (delta: -91.4MB). Peak memory consumption was 211.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 58 PlacesBefore, 20 PlacesAfterwards, 54 TransitionsBefore, 15 TransitionsAfterwards, 492 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 43 TotalNumberOfCompositions, 924 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 603, independent: 554, independent conditional: 0, independent unconditional: 554, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 265, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 603, independent: 296, independent conditional: 0, independent unconditional: 296, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 265, unknown conditional: 0, unknown unconditional: 265] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.3s, 76 PlacesBefore, 34 PlacesAfterwards, 68 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 47 TotalNumberOfCompositions, 3088 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1639, independent: 1542, independent conditional: 0, independent unconditional: 1542, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 673, independent: 655, independent conditional: 0, independent unconditional: 655, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1639, independent: 887, independent conditional: 0, independent unconditional: 887, dependent: 79, dependent conditional: 0, dependent unconditional: 79, unknown: 673, unknown conditional: 0, unknown unconditional: 673] , Statistics on independence cache: Total cache size (in pairs): 102, Positive cache size: 93, Positive conditional cache size: 0, Positive unconditional cache size: 93, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 88 PlacesBefore, 35 PlacesAfterwards, 82 TransitionsBefore, 27 TransitionsAfterwards, 2016 CoEnabledTransitionPairs, 5 FixpointIterations, 15 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 2 ChoiceCompositions, 64 TotalNumberOfCompositions, 4295 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2101, independent: 1995, independent conditional: 0, independent unconditional: 1995, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1069, independent: 1040, independent conditional: 0, independent unconditional: 1040, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2101, independent: 955, independent conditional: 0, independent unconditional: 955, dependent: 77, dependent conditional: 0, dependent unconditional: 77, unknown: 1069, unknown conditional: 0, unknown unconditional: 1069] , Statistics on independence cache: Total cache size (in pairs): 100, Positive cache size: 89, Positive conditional cache size: 0, Positive unconditional cache size: 89, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L709] 0 _Bool main$tmp_guard0; [L710] 0 _Bool main$tmp_guard1; [L712] 0 int x = 0; [L714] 0 int y = 0; [L756] 0 pthread_t t2485[2]; [L757] 0 int asdf=0; VAL [__unbuffered_cnt=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, x=0, y=0] [L757] COND TRUE 0 asdf<2 [L757] FCALL, FORK 0 pthread_create(&t2485[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2485[asdf], ((void *)0), P0, ((void *)0))=-3, t2485={5:0}, x=0, y=0] [L757] 0 asdf++ VAL [__unbuffered_cnt=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, x=0, y=0] [L757] COND TRUE 0 asdf<2 [L757] FCALL, FORK 0 pthread_create(&t2485[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2485[asdf], ((void *)0), P0, ((void *)0))=-2, t2485={5:0}, x=0, y=0] [L757] 0 asdf++ VAL [__unbuffered_cnt=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, x=0, y=0] [L757] COND FALSE 0 !(asdf<2) [L758] 0 pthread_t t2486[2]; [L759] 0 int asdf=0; VAL [__unbuffered_cnt=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, t2486={3:0}, x=0, y=0] [L759] COND TRUE 0 asdf<2 [L759] FCALL, FORK 0 pthread_create(&t2486[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2486[asdf], ((void *)0), P1, ((void *)0))=-1, t2485={5:0}, t2486={3:0}, x=0, y=0] [L759] 0 asdf++ VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, t2486={3:0}, x=0, y=0] [L759] COND TRUE 0 asdf<2 [L759] FCALL, FORK 0 pthread_create(&t2486[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2486[asdf], ((void *)0), P1, ((void *)0))=0, t2485={5:0}, t2486={3:0}, x=0, y=0] [L759] 0 asdf++ VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2485={5:0}, t2486={3:0}, x=0, y=0] [L718] 1 y = 2 VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L718] 2 y = 2 VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=0, y=2] [L721] 1 x = 1 VAL [__unbuffered_cnt=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=1, y=2] [L726] 1 __unbuffered_cnt = __unbuffered_cnt + 1 [L728] 1 return 0; [L726] 2 __unbuffered_cnt = __unbuffered_cnt + 1 [L728] 2 return 0; [L759] COND FALSE 0 !(asdf<2) [L761] 0 main$tmp_guard0 = __unbuffered_cnt == 2 [L763] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) VAL [\old(cond)=1, \result={0:0}, __unbuffered_cnt=2, arg={0:0}, arg={0:0}, arg={0:0}, cond=1, main$tmp_guard0=1, main$tmp_guard1=0, x=1, y=2] [L733] 3 x = 2 VAL [\result={0:0}, __unbuffered_cnt=2, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=1, main$tmp_guard1=0, x=2, y=2] [L763] RET 0 assume_abort_if_not(main$tmp_guard0) [L767] 0 main$tmp_guard1 = !(x == 2 && y == 2) [L769] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, __unbuffered_cnt=2, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=2, y=2] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 91 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.9s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 28 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 7 procedures, 105 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 114 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 242 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 8 mSDtfsCounter, 242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=2, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 42/50 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 105 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 8.2s, OverallIterations: 11, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 408 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 290 mSDsluCounter, 149 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 84 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 839 IncrementalHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 65 mSDtfsCounter, 839 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1239occurred in iteration=10, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 259 NumberOfCodeBlocks, 259 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 267 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 SizeOfPredicates, 0 NumberOfNonLiveVariables, 500 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 107/125 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 01:07:50,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...