/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 05:29:55,195 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 05:29:55,261 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 05:29:55,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 05:29:55,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 05:29:55,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 05:29:55,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 05:29:55,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 05:29:55,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 05:29:55,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 05:29:55,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 05:29:55,308 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 05:29:55,309 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 05:29:55,310 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 05:29:55,311 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 05:29:55,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 05:29:55,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 05:29:55,311 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 05:29:55,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 05:29:55,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 05:29:55,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 05:29:55,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 05:29:55,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 05:29:55,313 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 05:29:55,314 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 05:29:55,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 05:29:55,315 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 05:29:55,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 05:29:55,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 05:29:55,316 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 05:29:55,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:29:55,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 05:29:55,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 05:29:55,317 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 05:29:55,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 05:29:55,318 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 05:29:55,318 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 05:29:55,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 05:29:55,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 05:29:55,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 05:29:55,589 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 05:29:55,589 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 05:29:55,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i [2023-08-04 05:29:56,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 05:29:57,015 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 05:29:57,015 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix004.oepc_bound2.i [2023-08-04 05:29:57,035 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1818dc4/96f9ad89f63d491a95c94ef17b1d5bc0/FLAG57e8021f2 [2023-08-04 05:29:57,048 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f1818dc4/96f9ad89f63d491a95c94ef17b1d5bc0 [2023-08-04 05:29:57,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 05:29:57,052 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 05:29:57,053 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 05:29:57,053 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 05:29:57,056 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 05:29:57,057 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4ccab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57, skipping insertion in model container [2023-08-04 05:29:57,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,108 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 05:29:57,244 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_mix004.oepc_bound2.i[945,958] [2023-08-04 05:29:57,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:29:57,400 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 05:29:57,410 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_mix004.oepc_bound2.i[945,958] [2023-08-04 05:29:57,417 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:29:57,418 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 05:29:57,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 05:29:57,478 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:29:57,479 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 05:29:57,484 INFO L206 MainTranslator]: Completed translation [2023-08-04 05:29:57,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57 WrapperNode [2023-08-04 05:29:57,485 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 05:29:57,486 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 05:29:57,486 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 05:29:57,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 05:29:57,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,527 INFO L138 Inliner]: procedures = 177, calls = 71, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 179 [2023-08-04 05:29:57,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 05:29:57,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 05:29:57,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 05:29:57,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 05:29:57,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 05:29:57,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 05:29:57,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 05:29:57,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 05:29:57,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (1/1) ... [2023-08-04 05:29:57,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 05:29:57,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:29:57,602 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 05:29:57,612 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 05:29:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 05:29:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 05:29:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 05:29:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 05:29:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 05:29:57,637 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 05:29:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 05:29:57,637 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 05:29:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 05:29:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 05:29:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 05:29:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 05:29:57,638 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 05:29:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 05:29:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 05:29:57,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 05:29:57,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 05:29:57,640 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 05:29:57,790 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 05:29:57,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 05:29:58,136 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 05:29:58,263 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 05:29:58,264 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 05:29:58,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:29:58 BoogieIcfgContainer [2023-08-04 05:29:58,266 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 05:29:58,269 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 05:29:58,269 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 05:29:58,272 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 05:29:58,273 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 05:29:57" (1/3) ... [2023-08-04 05:29:58,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4178e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:29:58, skipping insertion in model container [2023-08-04 05:29:58,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 05:29:57" (2/3) ... [2023-08-04 05:29:58,274 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d4178e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 05:29:58, skipping insertion in model container [2023-08-04 05:29:58,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 05:29:58" (3/3) ... [2023-08-04 05:29:58,277 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix004.oepc_bound2.i [2023-08-04 05:29:58,284 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 05:29:58,292 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 05:29:58,292 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 05:29:58,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 05:29:58,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:29:58,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,618 INFO L124 PetriNetUnfolderBase]: 62/939 cut-off events. [2023-08-04 05:29:58,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:29:58,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 939 events. 62/939 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5833 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-04 05:29:58,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:29:58,651 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,655 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 162 transitions, 344 flow [2023-08-04 05:29:58,765 INFO L124 PetriNetUnfolderBase]: 62/939 cut-off events. [2023-08-04 05:29:58,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:29:58,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 939 events. 62/939 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5833 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-04 05:29:58,787 INFO L119 LiptonReduction]: Number of co-enabled transitions 4642 [2023-08-04 05:30:02,809 INFO L134 LiptonReduction]: Checked pairs total: 13405 [2023-08-04 05:30:02,810 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-04 05:30:02,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:30:02,827 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;@602af9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:30:02,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 05:30:02,829 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:30:02,830 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-04 05:30:02,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:02,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:02,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 05:30:02,831 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:02,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 20954862, now seen corresponding path program 1 times [2023-08-04 05:30:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:02,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93698152] [2023-08-04 05:30:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:03,189 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 05:30:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:03,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93698152] [2023-08-04 05:30:03,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93698152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:03,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:30:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 05:30:03,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362007759] [2023-08-04 05:30:03,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:03,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:30:03,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 297 [2023-08-04 05:30:03,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:03,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:03,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 297 [2023-08-04 05:30:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:05,507 INFO L124 PetriNetUnfolderBase]: 12873/19919 cut-off events. [2023-08-04 05:30:05,507 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-04 05:30:05,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38712 conditions, 19919 events. 12873/19919 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 143715 event pairs, 3816 based on Foata normal form. 0/18124 useless extension candidates. Maximal degree in co-relation 32392. Up to 12394 conditions per place. [2023-08-04 05:30:05,649 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 56 selfloop transitions, 2 changer transitions 7/70 dead transitions. [2023-08-04 05:30:05,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 291 flow [2023-08-04 05:30:05,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:30:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:30:05,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-04 05:30:05,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5499438832772167 [2023-08-04 05:30:05,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-04 05:30:05,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-04 05:30:05,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:05,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-04 05:30:05,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:05,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:05,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:05,685 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 108 flow. Second operand 3 states and 490 transitions. [2023-08-04 05:30:05,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 291 flow [2023-08-04 05:30:05,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 291 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 05:30:05,692 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 90 flow [2023-08-04 05:30:05,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-04 05:30:05,696 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-04 05:30:05,697 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 90 flow [2023-08-04 05:30:05,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:05,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:05,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:30:05,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 05:30:05,698 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:05,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1678325334, now seen corresponding path program 1 times [2023-08-04 05:30:05,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:05,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491460085] [2023-08-04 05:30:05,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:05,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:05,770 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 05:30:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:05,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491460085] [2023-08-04 05:30:05,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491460085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:05,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:30:05,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 05:30:05,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415565572] [2023-08-04 05:30:05,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:05,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:05,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:05,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:30:05,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 297 [2023-08-04 05:30:05,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:05,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:05,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 297 [2023-08-04 05:30:05,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:07,315 INFO L124 PetriNetUnfolderBase]: 9395/13782 cut-off events. [2023-08-04 05:30:07,315 INFO L125 PetriNetUnfolderBase]: For 1044/1044 co-relation queries the response was YES. [2023-08-04 05:30:07,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28247 conditions, 13782 events. 9395/13782 cut-off events. For 1044/1044 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 83837 event pairs, 8432 based on Foata normal form. 0/12790 useless extension candidates. Maximal degree in co-relation 28231. Up to 13240 conditions per place. [2023-08-04 05:30:07,392 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 33 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 05:30:07,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 172 flow [2023-08-04 05:30:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:30:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:30:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 454 transitions. [2023-08-04 05:30:07,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5095398428731762 [2023-08-04 05:30:07,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 454 transitions. [2023-08-04 05:30:07,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 454 transitions. [2023-08-04 05:30:07,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:07,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 454 transitions. [2023-08-04 05:30:07,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:07,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:07,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:07,411 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 90 flow. Second operand 3 states and 454 transitions. [2023-08-04 05:30:07,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 172 flow [2023-08-04 05:30:07,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:30:07,413 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 94 flow [2023-08-04 05:30:07,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-08-04 05:30:07,414 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-04 05:30:07,414 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 94 flow [2023-08-04 05:30:07,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:07,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:07,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:30:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 05:30:07,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:07,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1742433502, now seen corresponding path program 1 times [2023-08-04 05:30:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:07,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413212226] [2023-08-04 05:30:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:07,516 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 05:30:07,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:07,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413212226] [2023-08-04 05:30:07,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413212226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:30:07,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071463611] [2023-08-04 05:30:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:07,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:07,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:30:07,521 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 05:30:07,551 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 05:30:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:07,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 05:30:07,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:30:07,677 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 05:30:07,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 05:30:07,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071463611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:07,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 05:30:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 05:30:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013293694] [2023-08-04 05:30:07,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:07,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:07,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:30:07,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 297 [2023-08-04 05:30:07,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 05:30:07,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:07,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 297 [2023-08-04 05:30:07,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:08,545 INFO L124 PetriNetUnfolderBase]: 7984/11595 cut-off events. [2023-08-04 05:30:08,546 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-04 05:30:08,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22896 conditions, 11595 events. 7984/11595 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 67770 event pairs, 7194 based on Foata normal form. 0/10874 useless extension candidates. Maximal degree in co-relation 22879. Up to 11037 conditions per place. [2023-08-04 05:30:08,594 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 36 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 05:30:08,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 44 transitions, 186 flow [2023-08-04 05:30:08,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:30:08,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:30:08,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 05:30:08,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5129068462401796 [2023-08-04 05:30:08,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 05:30:08,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 05:30:08,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:08,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 05:30:08,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:08,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:08,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:08,600 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 94 flow. Second operand 3 states and 457 transitions. [2023-08-04 05:30:08,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 44 transitions, 186 flow [2023-08-04 05:30:08,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 44 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:30:08,602 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 98 flow [2023-08-04 05:30:08,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2023-08-04 05:30:08,603 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-04 05:30:08,603 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 98 flow [2023-08-04 05:30:08,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 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 05:30:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:08,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:30:08,614 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 05:30:08,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:08,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:08,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1390149045, now seen corresponding path program 1 times [2023-08-04 05:30:08,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:08,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254853361] [2023-08-04 05:30:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:08,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:08,884 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 05:30:08,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:08,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254853361] [2023-08-04 05:30:08,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254853361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:30:08,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054557390] [2023-08-04 05:30:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:08,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:08,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:30:08,886 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 05:30:08,917 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 05:30:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:08,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 05:30:08,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:30:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 05:30:09,010 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 05:30:09,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054557390] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:09,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 05:30:09,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 05:30:09,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68841410] [2023-08-04 05:30:09,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:09,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:09,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:30:09,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 297 [2023-08-04 05:30:09,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:09,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:09,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 297 [2023-08-04 05:30:09,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:09,775 INFO L124 PetriNetUnfolderBase]: 6824/9635 cut-off events. [2023-08-04 05:30:09,775 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-04 05:30:09,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19232 conditions, 9635 events. 6824/9635 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 52890 event pairs, 6056 based on Foata normal form. 0/9026 useless extension candidates. Maximal degree in co-relation 19215. Up to 9119 conditions per place. [2023-08-04 05:30:09,819 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 39 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 05:30:09,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2023-08-04 05:30:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:30:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:30:09,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-04 05:30:09,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162738496071829 [2023-08-04 05:30:09,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-04 05:30:09,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-04 05:30:09,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:09,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-04 05:30:09,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:09,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:09,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:09,826 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 98 flow. Second operand 3 states and 460 transitions. [2023-08-04 05:30:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2023-08-04 05:30:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:30:09,828 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 102 flow [2023-08-04 05:30:09,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-04 05:30:09,829 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-04 05:30:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 102 flow [2023-08-04 05:30:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:09,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:09,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:30:09,837 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 05:30:10,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 05:30:10,035 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:10,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:10,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1091784935, now seen corresponding path program 1 times [2023-08-04 05:30:10,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:10,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415719225] [2023-08-04 05:30:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:10,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 05:30:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:10,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415719225] [2023-08-04 05:30:10,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415719225] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:30:10,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251714004] [2023-08-04 05:30:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:10,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:30:10,095 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 05:30:10,121 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 05:30:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:10,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 05:30:10,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:30:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 05:30:10,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 05:30:10,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251714004] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:10,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 05:30:10,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 05:30:10,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882651010] [2023-08-04 05:30:10,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:10,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:10,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:10,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:10,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:30:10,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 297 [2023-08-04 05:30:10,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:10,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:10,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 297 [2023-08-04 05:30:10,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:10,966 INFO L124 PetriNetUnfolderBase]: 6392/8907 cut-off events. [2023-08-04 05:30:10,966 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-04 05:30:10,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18069 conditions, 8907 events. 6392/8907 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 48010 event pairs, 4104 based on Foata normal form. 0/8566 useless extension candidates. Maximal degree in co-relation 18051. Up to 7279 conditions per place. [2023-08-04 05:30:10,998 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 43 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2023-08-04 05:30:10,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 222 flow [2023-08-04 05:30:10,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 05:30:10,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 05:30:11,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-04 05:30:11,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207631874298541 [2023-08-04 05:30:11,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-04 05:30:11,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-04 05:30:11,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:11,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-04 05:30:11,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,004 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,004 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 102 flow. Second operand 3 states and 464 transitions. [2023-08-04 05:30:11,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 222 flow [2023-08-04 05:30:11,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 05:30:11,006 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 106 flow [2023-08-04 05:30:11,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 05:30:11,007 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-04 05:30:11,007 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 106 flow [2023-08-04 05:30:11,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:11,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 05:30:11,012 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 05:30:11,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:11,212 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 05:30:11,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash -380743681, now seen corresponding path program 1 times [2023-08-04 05:30:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821310542] [2023-08-04 05:30:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:11,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 05:30:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821310542] [2023-08-04 05:30:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821310542] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 05:30:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860565434] [2023-08-04 05:30:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:11,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 05:30:11,297 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 05:30:11,300 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 05:30:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:11,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 05:30:11,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 05:30:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 05:30:11,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 05:30:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 05:30:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860565434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 05:30:11,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 05:30:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 05:30:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481599778] [2023-08-04 05:30:11,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 05:30:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 05:30:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 05:30:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 05:30:11,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 297 [2023-08-04 05:30:11,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:11,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 297 [2023-08-04 05:30:11,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 05:30:11,475 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-08-04 05:30:11,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:11,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 21 events. 6/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 05:30:11,475 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 05:30:11,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 51 flow [2023-08-04 05:30:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 05:30:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 05:30:11,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-08-04 05:30:11,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2023-08-04 05:30:11,477 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-08-04 05:30:11,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-08-04 05:30:11,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 05:30:11,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-08-04 05:30:11,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 05:30:11,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,482 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,482 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 106 flow. Second operand 4 states and 564 transitions. [2023-08-04 05:30:11,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 51 flow [2023-08-04 05:30:11,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 12 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 05:30:11,483 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 05:30:11,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 05:30:11,483 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -31 predicate places. [2023-08-04 05:30:11,483 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 05:30:11,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:11,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 05:30:11,486 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 05:30:11,487 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 05:30:11,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 05:30:11,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 05:30:11,700 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 05:30:11,702 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 05:30:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 162 transitions, 344 flow [2023-08-04 05:30:11,781 INFO L124 PetriNetUnfolderBase]: 62/939 cut-off events. [2023-08-04 05:30:11,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:11,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 939 events. 62/939 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5833 event pairs, 0 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-04 05:30:11,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 162 transitions, 344 flow [2023-08-04 05:30:11,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 131 transitions, 282 flow [2023-08-04 05:30:11,784 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:30:11,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 131 transitions, 282 flow [2023-08-04 05:30:11,785 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 131 transitions, 282 flow [2023-08-04 05:30:11,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 131 transitions, 282 flow [2023-08-04 05:30:11,816 INFO L124 PetriNetUnfolderBase]: 14/443 cut-off events. [2023-08-04 05:30:11,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 443 events. 14/443 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2046 event pairs, 0 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2023-08-04 05:30:11,825 INFO L119 LiptonReduction]: Number of co-enabled transitions 2720 [2023-08-04 05:30:14,910 INFO L134 LiptonReduction]: Checked pairs total: 7192 [2023-08-04 05:30:14,911 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 05:30:14,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 05:30:14,913 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;@602af9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:30:14,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 05:30:14,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:30:14,915 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2023-08-04 05:30:14,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:14,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:14,916 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 05:30:14,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 05:30:14,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1686583923, now seen corresponding path program 1 times [2023-08-04 05:30:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:14,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617340490] [2023-08-04 05:30:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:30:14,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 05:30:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 05:30:14,954 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 05:30:14,954 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 05:30:14,954 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 05:30:14,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 05:30:14,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 05:30:14,955 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 05:30:14,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 05:30:14,955 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 05:30:14,955 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 05:30:14,961 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 05:30:14,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 05:30:14,998 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 05:30:15,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,372 INFO L124 PetriNetUnfolderBase]: 282/4345 cut-off events. [2023-08-04 05:30:15,372 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 05:30:15,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 4345 events. 282/4345 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42346 event pairs, 0 based on Foata normal form. 0/3860 useless extension candidates. Maximal degree in co-relation 3140. Up to 162 conditions per place. [2023-08-04 05:30:15,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,407 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 05:30:15,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 197 transitions, 442 flow [2023-08-04 05:30:15,812 INFO L124 PetriNetUnfolderBase]: 282/4345 cut-off events. [2023-08-04 05:30:15,812 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 05:30:15,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4634 conditions, 4345 events. 282/4345 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 42346 event pairs, 0 based on Foata normal form. 0/3860 useless extension candidates. Maximal degree in co-relation 3140. Up to 162 conditions per place. [2023-08-04 05:30:15,868 INFO L119 LiptonReduction]: Number of co-enabled transitions 11452 [2023-08-04 05:30:19,449 INFO L134 LiptonReduction]: Checked pairs total: 38914 [2023-08-04 05:30:19,450 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-04 05:30:19,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 05:30:19,452 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;@602af9b8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 05:30:19,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 05:30:19,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 05:30:19,453 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-04 05:30:19,453 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 05:30:19,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 05:30:19,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 05:30:19,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 05:30:19,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 05:30:19,454 INFO L85 PathProgramCache]: Analyzing trace with hash 35671207, now seen corresponding path program 1 times [2023-08-04 05:30:19,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 05:30:19,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933767862] [2023-08-04 05:30:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 05:30:19,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 05:30:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 05:30:19,531 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 05:30:19,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 05:30:19,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933767862] [2023-08-04 05:30:19,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933767862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 05:30:19,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 05:30:19,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 05:30:19,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989327482] [2023-08-04 05:30:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 05:30:19,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 05:30:19,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 05:30:19,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 05:30:19,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 05:30:19,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 341 [2023-08-04 05:30:19,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 71 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 05:30:19,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 05:30:19,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 341 [2023-08-04 05:30:19,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand