/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/weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:01:31,515 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:01:31,579 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:01:31,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:01:31,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:01:31,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:01:31,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:01:31,605 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:01:31,606 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:01:31,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:01:31,609 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:01:31,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:01:31,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:01:31,611 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:01:31,611 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:01:31,611 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:01:31,611 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:01:31,611 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:01:31,612 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:01:31,612 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:01:31,612 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:01:31,612 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:01:31,612 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:01:31,613 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:01:31,613 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:01:31,614 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:01:31,614 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:01:31,614 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:01:31,614 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:01:31,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:01:31,615 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:01:31,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:01:31,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:01:31,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:01:31,616 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:01:31,616 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:01:31,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:01:31,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:01:31,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:01:31,818 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:01:31,819 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:01:31,819 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c [2023-08-04 09:01:32,927 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:01:33,114 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:01:33,115 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c [2023-08-04 09:01:33,120 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a38890a/fbcd8ba452454f8eb28d773bd1f88422/FLAG924f10c9c [2023-08-04 09:01:33,133 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a38890a/fbcd8ba452454f8eb28d773bd1f88422 [2023-08-04 09:01:33,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:01:33,138 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:01:33,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:01:33,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:01:33,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:01:33,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4952c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33, skipping insertion in model container [2023-08-04 09:01:33,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,171 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:01:33,340 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c[4617,4630] [2023-08-04 09:01:33,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:01:33,352 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:01:33,377 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c[4617,4630] [2023-08-04 09:01:33,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:01:33,387 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:01:33,388 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:01:33,394 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:01:33,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33 WrapperNode [2023-08-04 09:01:33,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:01:33,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:01:33,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:01:33,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:01:33,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,409 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,430 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 394 [2023-08-04 09:01:33,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:01:33,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:01:33,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:01:33,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:01:33,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,445 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,458 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,459 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,462 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:01:33,463 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:01:33,463 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:01:33,463 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:01:33,464 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (1/1) ... [2023-08-04 09:01:33,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:01:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:33,503 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 09:01:33,505 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 09:01:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:01:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:01:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:01:33,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:01:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:01:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:01:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:01:33,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:01:33,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:01:33,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:01:33,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:01:33,532 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 09:01:33,663 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:01:33,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:01:34,123 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:01:34,299 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:01:34,299 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 09:01:34,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:01:34 BoogieIcfgContainer [2023-08-04 09:01:34,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:01:34,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:01:34,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:01:34,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:01:34,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:01:33" (1/3) ... [2023-08-04 09:01:34,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea86f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:01:34, skipping insertion in model container [2023-08-04 09:01:34,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:01:33" (2/3) ... [2023-08-04 09:01:34,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea86f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:01:34, skipping insertion in model container [2023-08-04 09:01:34,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:01:34" (3/3) ... [2023-08-04 09:01:34,324 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-buffer-mult-alt.wvr_bound2.c [2023-08-04 09:01:34,329 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:01:34,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:01:34,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:01:34,335 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:01:34,449 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:01:34,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:34,788 INFO L124 PetriNetUnfolderBase]: 278/1576 cut-off events. [2023-08-04 09:01:34,788 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:01:34,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1576 events. 278/1576 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9942 event pairs, 0 based on Foata normal form. 0/1316 useless extension candidates. Maximal degree in co-relation 949. Up to 33 conditions per place. [2023-08-04 09:01:34,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:34,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:34,819 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:01:34,829 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:34,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:34,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:35,017 INFO L124 PetriNetUnfolderBase]: 278/1576 cut-off events. [2023-08-04 09:01:35,017 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:01:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1576 events. 278/1576 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9942 event pairs, 0 based on Foata normal form. 0/1316 useless extension candidates. Maximal degree in co-relation 949. Up to 33 conditions per place. [2023-08-04 09:01:35,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:01:42,701 INFO L134 LiptonReduction]: Checked pairs total: 23660 [2023-08-04 09:01:42,701 INFO L136 LiptonReduction]: Total number of compositions: 270 [2023-08-04 09:01:42,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:01:42,717 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;@39b5b719, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:01:42,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:01:42,727 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:01:42,727 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-04 09:01:42,727 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:01:42,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:42,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:42,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:42,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1954841170, now seen corresponding path program 1 times [2023-08-04 09:01:42,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:42,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570393936] [2023-08-04 09:01:42,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:42,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:42,996 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 09:01:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570393936] [2023-08-04 09:01:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570393936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:42,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:01:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:01:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275728614] [2023-08-04 09:01:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:43,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:43,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:43,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:43,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:01:43,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:43,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 74 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:43,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:43,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:43,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:44,908 INFO L124 PetriNetUnfolderBase]: 18264/25467 cut-off events. [2023-08-04 09:01:44,908 INFO L125 PetriNetUnfolderBase]: For 1477/1477 co-relation queries the response was YES. [2023-08-04 09:01:44,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51401 conditions, 25467 events. 18264/25467 cut-off events. For 1477/1477 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 159577 event pairs, 9825 based on Foata normal form. 0/16064 useless extension candidates. Maximal degree in co-relation 43341. Up to 23970 conditions per place. [2023-08-04 09:01:45,083 INFO L140 encePairwiseOnDemand]: 573/577 looper letters, 60 selfloop transitions, 2 changer transitions 3/77 dead transitions. [2023-08-04 09:01:45,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 348 flow [2023-08-04 09:01:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 830 transitions. [2023-08-04 09:01:45,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47949162333911033 [2023-08-04 09:01:45,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 830 transitions. [2023-08-04 09:01:45,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 830 transitions. [2023-08-04 09:01:45,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:45,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 830 transitions. [2023-08-04 09:01:45,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:45,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:45,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:45,109 INFO L175 Difference]: Start difference. First operand has 61 places, 74 transitions, 216 flow. Second operand 3 states and 830 transitions. [2023-08-04 09:01:45,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 348 flow [2023-08-04 09:01:45,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:01:45,124 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 214 flow [2023-08-04 09:01:45,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 09:01:45,129 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:01:45,129 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 214 flow [2023-08-04 09:01:45,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.6666666666667) internal successors, (776), 3 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:45,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:45,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:45,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:01:45,130 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:45,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1806244244, now seen corresponding path program 1 times [2023-08-04 09:01:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:45,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144644313] [2023-08-04 09:01:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:45,235 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 09:01:45,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144644313] [2023-08-04 09:01:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144644313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622062343] [2023-08-04 09:01:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:45,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:45,273 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 09:01:45,302 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 09:01:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:45,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:45,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:45,469 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 09:01:45,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622062343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:45,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:45,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:45,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172455296] [2023-08-04 09:01:45,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:45,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:45,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:45,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:45,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:45,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:47,096 INFO L124 PetriNetUnfolderBase]: 17757/24677 cut-off events. [2023-08-04 09:01:47,096 INFO L125 PetriNetUnfolderBase]: For 1448/1448 co-relation queries the response was YES. [2023-08-04 09:01:47,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49794 conditions, 24677 events. 17757/24677 cut-off events. For 1448/1448 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 153390 event pairs, 9617 based on Foata normal form. 0/15592 useless extension candidates. Maximal degree in co-relation 41737. Up to 23200 conditions per place. [2023-08-04 09:01:47,265 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 63 selfloop transitions, 2 changer transitions 1/78 dead transitions. [2023-08-04 09:01:47,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 360 flow [2023-08-04 09:01:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-04 09:01:47,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806470248411323 [2023-08-04 09:01:47,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-04 09:01:47,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-04 09:01:47,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:47,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-04 09:01:47,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:47,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:47,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:47,278 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 214 flow. Second operand 3 states and 832 transitions. [2023-08-04 09:01:47,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 360 flow [2023-08-04 09:01:47,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 346 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:01:47,286 INFO L231 Difference]: Finished difference. Result has 60 places, 71 transitions, 208 flow [2023-08-04 09:01:47,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=60, PETRI_TRANSITIONS=71} [2023-08-04 09:01:47,288 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2023-08-04 09:01:47,288 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 71 transitions, 208 flow [2023-08-04 09:01:47,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:47,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:47,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:47,300 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 09:01:47,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:47,494 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:47,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1800141872, now seen corresponding path program 1 times [2023-08-04 09:01:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561599432] [2023-08-04 09:01:47,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:47,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:47,551 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 09:01:47,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561599432] [2023-08-04 09:01:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561599432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089923676] [2023-08-04 09:01:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:47,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:47,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:47,561 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 09:01:47,579 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 09:01:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:47,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:47,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:47,656 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 09:01:47,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:47,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089923676] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:47,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:47,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:47,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176377107] [2023-08-04 09:01:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:47,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:47,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:47,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 71 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:47,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:47,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:47,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:49,399 INFO L124 PetriNetUnfolderBase]: 17173/23853 cut-off events. [2023-08-04 09:01:49,400 INFO L125 PetriNetUnfolderBase]: For 822/822 co-relation queries the response was YES. [2023-08-04 09:01:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48182 conditions, 23853 events. 17173/23853 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 148104 event pairs, 8836 based on Foata normal form. 0/15084 useless extension candidates. Maximal degree in co-relation 21118. Up to 22225 conditions per place. [2023-08-04 09:01:49,534 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 66 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 09:01:49,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 362 flow [2023-08-04 09:01:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-08-04 09:01:49,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48180242634315423 [2023-08-04 09:01:49,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-08-04 09:01:49,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-08-04 09:01:49,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:49,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-08-04 09:01:49,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:49,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:49,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:49,542 INFO L175 Difference]: Start difference. First operand has 60 places, 71 transitions, 208 flow. Second operand 3 states and 834 transitions. [2023-08-04 09:01:49,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 362 flow [2023-08-04 09:01:49,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:01:49,545 INFO L231 Difference]: Finished difference. Result has 61 places, 71 transitions, 212 flow [2023-08-04 09:01:49,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=61, PETRI_TRANSITIONS=71} [2023-08-04 09:01:49,546 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2023-08-04 09:01:49,546 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 71 transitions, 212 flow [2023-08-04 09:01:49,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:49,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:49,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:49,565 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 09:01:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:01:49,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:49,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:49,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1139864576, now seen corresponding path program 1 times [2023-08-04 09:01:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152025434] [2023-08-04 09:01:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:49,844 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 09:01:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152025434] [2023-08-04 09:01:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152025434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038269737] [2023-08-04 09:01:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:49,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:49,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:49,867 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 09:01:49,868 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 09:01:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:49,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:49,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:49,967 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 09:01:49,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:49,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038269737] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:49,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:49,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:49,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109183627] [2023-08-04 09:01:49,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:49,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:49,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:49,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 71 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:49,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:49,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:49,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:51,498 INFO L124 PetriNetUnfolderBase]: 17125/23805 cut-off events. [2023-08-04 09:01:51,498 INFO L125 PetriNetUnfolderBase]: For 872/872 co-relation queries the response was YES. [2023-08-04 09:01:51,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48231 conditions, 23805 events. 17125/23805 cut-off events. For 872/872 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 148301 event pairs, 8712 based on Foata normal form. 0/15136 useless extension candidates. Maximal degree in co-relation 21144. Up to 21457 conditions per place. [2023-08-04 09:01:51,766 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 68 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-04 09:01:51,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 82 transitions, 374 flow [2023-08-04 09:01:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-08-04 09:01:51,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829578278451762 [2023-08-04 09:01:51,769 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-08-04 09:01:51,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-08-04 09:01:51,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:51,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-08-04 09:01:51,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:51,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:51,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:51,775 INFO L175 Difference]: Start difference. First operand has 61 places, 71 transitions, 212 flow. Second operand 3 states and 836 transitions. [2023-08-04 09:01:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 82 transitions, 374 flow [2023-08-04 09:01:51,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:01:51,779 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 216 flow [2023-08-04 09:01:51,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2023-08-04 09:01:51,781 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2023-08-04 09:01:51,781 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 216 flow [2023-08-04 09:01:51,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:51,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:51,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:51,795 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 09:01:51,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:51,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:51,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:51,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1885477558, now seen corresponding path program 1 times [2023-08-04 09:01:51,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:51,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950786127] [2023-08-04 09:01:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:52,035 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 09:01:52,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:52,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950786127] [2023-08-04 09:01:52,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950786127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:52,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758686777] [2023-08-04 09:01:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:52,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:52,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:52,045 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 09:01:52,047 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 09:01:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:52,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:52,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:01:52,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:52,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758686777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:52,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:52,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:52,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859954241] [2023-08-04 09:01:52,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:52,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:52,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:52,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:52,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:52,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:52,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:52,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:53,215 INFO L124 PetriNetUnfolderBase]: 11287/15951 cut-off events. [2023-08-04 09:01:53,216 INFO L125 PetriNetUnfolderBase]: For 672/672 co-relation queries the response was YES. [2023-08-04 09:01:53,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32940 conditions, 15951 events. 11287/15951 cut-off events. For 672/672 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 93553 event pairs, 6448 based on Foata normal form. 0/10270 useless extension candidates. Maximal degree in co-relation 13750. Up to 13057 conditions per place. [2023-08-04 09:01:53,305 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 73 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-04 09:01:53,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 408 flow [2023-08-04 09:01:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-04 09:01:53,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858463316002311 [2023-08-04 09:01:53,308 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-04 09:01:53,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-04 09:01:53,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:53,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-04 09:01:53,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:53,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:53,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:53,313 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 216 flow. Second operand 3 states and 841 transitions. [2023-08-04 09:01:53,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 408 flow [2023-08-04 09:01:53,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:01:53,317 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 224 flow [2023-08-04 09:01:53,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2023-08-04 09:01:53,318 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 2 predicate places. [2023-08-04 09:01:53,318 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 224 flow [2023-08-04 09:01:53,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:53,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:53,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:53,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 09:01:53,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:53,524 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:53,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:53,524 INFO L85 PathProgramCache]: Analyzing trace with hash -397781281, now seen corresponding path program 1 times [2023-08-04 09:01:53,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:53,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920949355] [2023-08-04 09:01:53,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:53,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:01:53,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920949355] [2023-08-04 09:01:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920949355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578096827] [2023-08-04 09:01:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:53,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:53,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:53,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:01:53,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:01:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:53,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:53,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:01:53,714 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578096827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:53,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902174347] [2023-08-04 09:01:53,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:53,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:53,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:53,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:53,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:53,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:54,600 INFO L124 PetriNetUnfolderBase]: 8545/12283 cut-off events. [2023-08-04 09:01:54,600 INFO L125 PetriNetUnfolderBase]: For 792/792 co-relation queries the response was YES. [2023-08-04 09:01:54,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 12283 events. 8545/12283 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 70388 event pairs, 4892 based on Foata normal form. 0/8452 useless extension candidates. Maximal degree in co-relation 10884. Up to 9412 conditions per place. [2023-08-04 09:01:54,666 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 74 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-04 09:01:54,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 418 flow [2023-08-04 09:01:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-04 09:01:54,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858463316002311 [2023-08-04 09:01:54,668 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-04 09:01:54,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-04 09:01:54,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:54,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-04 09:01:54,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:54,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:54,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:54,673 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 224 flow. Second operand 3 states and 841 transitions. [2023-08-04 09:01:54,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 418 flow [2023-08-04 09:01:54,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:54,686 INFO L231 Difference]: Finished difference. Result has 65 places, 73 transitions, 234 flow [2023-08-04 09:01:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=65, PETRI_TRANSITIONS=73} [2023-08-04 09:01:54,687 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2023-08-04 09:01:54,687 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 73 transitions, 234 flow [2023-08-04 09:01:54,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:54,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 09:01:54,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:54,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:54,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1751841926, now seen corresponding path program 1 times [2023-08-04 09:01:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:54,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381556791] [2023-08-04 09:01:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:01:54,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381556791] [2023-08-04 09:01:54,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381556791] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:54,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496860174] [2023-08-04 09:01:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:54,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:54,977 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:01:55,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:01:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:55,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:55,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:01:55,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496860174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:55,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:55,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:01:55,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942866761] [2023-08-04 09:01:55,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:55,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:55,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:55,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 73 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:55,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:55,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:55,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:56,034 INFO L124 PetriNetUnfolderBase]: 8074/11597 cut-off events. [2023-08-04 09:01:56,035 INFO L125 PetriNetUnfolderBase]: For 987/987 co-relation queries the response was YES. [2023-08-04 09:01:56,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25093 conditions, 11597 events. 8074/11597 cut-off events. For 987/987 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 65761 event pairs, 5425 based on Foata normal form. 0/8180 useless extension candidates. Maximal degree in co-relation 17013. Up to 10345 conditions per place. [2023-08-04 09:01:56,101 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 75 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 09:01:56,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 430 flow [2023-08-04 09:01:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 841 transitions. [2023-08-04 09:01:56,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858463316002311 [2023-08-04 09:01:56,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 841 transitions. [2023-08-04 09:01:56,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 841 transitions. [2023-08-04 09:01:56,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:56,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 841 transitions. [2023-08-04 09:01:56,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:56,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:56,110 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:56,111 INFO L175 Difference]: Start difference. First operand has 65 places, 73 transitions, 234 flow. Second operand 3 states and 841 transitions. [2023-08-04 09:01:56,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 430 flow [2023-08-04 09:01:56,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:56,176 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 244 flow [2023-08-04 09:01:56,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2023-08-04 09:01:56,177 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-04 09:01:56,177 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 244 flow [2023-08-04 09:01:56,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:56,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:56,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:56,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:01:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:56,383 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:56,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:56,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1906499613, now seen corresponding path program 1 times [2023-08-04 09:01:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111826901] [2023-08-04 09:01:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:01:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111826901] [2023-08-04 09:01:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111826901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185729858] [2023-08-04 09:01:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:56,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:56,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:56,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:01:56,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:01:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:56,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:56,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:01:56,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:56,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185729858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:56,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:56,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:01:56,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440843408] [2023-08-04 09:01:56,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:56,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:56,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:56,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:56,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 577 [2023-08-04 09:01:56,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:56,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:56,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 577 [2023-08-04 09:01:56,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:57,345 INFO L124 PetriNetUnfolderBase]: 8059/11570 cut-off events. [2023-08-04 09:01:57,345 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2023-08-04 09:01:57,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25086 conditions, 11570 events. 8059/11570 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 65521 event pairs, 5634 based on Foata normal form. 0/8188 useless extension candidates. Maximal degree in co-relation 23419. Up to 10808 conditions per place. [2023-08-04 09:01:57,424 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 69 selfloop transitions, 2 changer transitions 2/85 dead transitions. [2023-08-04 09:01:57,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 85 transitions, 412 flow [2023-08-04 09:01:57,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2023-08-04 09:01:57,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829578278451762 [2023-08-04 09:01:57,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2023-08-04 09:01:57,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2023-08-04 09:01:57,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:57,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2023-08-04 09:01:57,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 577.0) internal successors, (2308), 4 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,432 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 244 flow. Second operand 3 states and 836 transitions. [2023-08-04 09:01:57,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 85 transitions, 412 flow [2023-08-04 09:01:57,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:57,468 INFO L231 Difference]: Finished difference. Result has 69 places, 73 transitions, 246 flow [2023-08-04 09:01:57,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=69, PETRI_TRANSITIONS=73} [2023-08-04 09:01:57,469 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 8 predicate places. [2023-08-04 09:01:57,469 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 73 transitions, 246 flow [2023-08-04 09:01:57,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:57,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:57,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:01:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:57,675 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:57,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash -733127294, now seen corresponding path program 1 times [2023-08-04 09:01:57,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:57,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706095678] [2023-08-04 09:01:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:01:57,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706095678] [2023-08-04 09:01:57,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706095678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:57,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270295952] [2023-08-04 09:01:57,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:57,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:57,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:57,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:01:57,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:01:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:57,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:01:57,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:01:57,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:01:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:01:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270295952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:01:57,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:01:57,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:01:57,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263840266] [2023-08-04 09:01:57,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:01:57,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:01:57,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:57,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:01:57,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:57,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 577 [2023-08-04 09:01:57,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 73 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 262.8) internal successors, (1314), 5 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:57,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 577 [2023-08-04 09:01:57,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:57,969 INFO L124 PetriNetUnfolderBase]: 12/28 cut-off events. [2023-08-04 09:01:57,969 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:01:57,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 28 events. 12/28 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 44 event pairs, 1 based on Foata normal form. 4/26 useless extension candidates. Maximal degree in co-relation 59. Up to 17 conditions per place. [2023-08-04 09:01:57,969 INFO L140 encePairwiseOnDemand]: 574/577 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-04 09:01:57,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 16 transitions, 66 flow [2023-08-04 09:01:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:01:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:01:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1032 transitions. [2023-08-04 09:01:57,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44714038128249567 [2023-08-04 09:01:57,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1032 transitions. [2023-08-04 09:01:57,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1032 transitions. [2023-08-04 09:01:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:57,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1032 transitions. [2023-08-04 09:01:57,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,977 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 577.0) internal successors, (2885), 5 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,977 INFO L175 Difference]: Start difference. First operand has 69 places, 73 transitions, 246 flow. Second operand 4 states and 1032 transitions. [2023-08-04 09:01:57,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 16 transitions, 66 flow [2023-08-04 09:01:57,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 16 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:57,977 INFO L231 Difference]: Finished difference. Result has 25 places, 0 transitions, 0 flow [2023-08-04 09:01:57,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=577, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=25, PETRI_TRANSITIONS=0} [2023-08-04 09:01:57,978 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -36 predicate places. [2023-08-04 09:01:57,978 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 0 transitions, 0 flow [2023-08-04 09:01:57,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 262.8) internal successors, (1314), 5 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:57,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:01:57,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 09:01:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 09:01:58,186 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:58,187 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:01:58,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,312 INFO L124 PetriNetUnfolderBase]: 278/1576 cut-off events. [2023-08-04 09:01:58,312 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:01:58,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1576 events. 278/1576 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9942 event pairs, 0 based on Foata normal form. 0/1316 useless extension candidates. Maximal degree in co-relation 949. Up to 33 conditions per place. [2023-08-04 09:01:58,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,324 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:01:58,324 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 307 transitions, 682 flow [2023-08-04 09:01:58,429 INFO L124 PetriNetUnfolderBase]: 278/1576 cut-off events. [2023-08-04 09:01:58,429 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:01:58,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1576 events. 278/1576 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9942 event pairs, 0 based on Foata normal form. 0/1316 useless extension candidates. Maximal degree in co-relation 949. Up to 33 conditions per place. [2023-08-04 09:01:58,443 INFO L119 LiptonReduction]: Number of co-enabled transitions 7790 [2023-08-04 09:02:05,719 INFO L134 LiptonReduction]: Checked pairs total: 23640 [2023-08-04 09:02:05,720 INFO L136 LiptonReduction]: Total number of compositions: 277 [2023-08-04 09:02:05,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:02:05,723 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;@39b5b719, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:02:05,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:02:05,728 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:02:05,728 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2023-08-04 09:02:05,728 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:02:05,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:05,728 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:05,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:02:05,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:05,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1556492831, now seen corresponding path program 1 times [2023-08-04 09:02:05,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:05,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541638394] [2023-08-04 09:02:05,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:05,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:02:05,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:02:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:02:05,814 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:02:05,814 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:02:05,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:02:05,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:02:05,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:02:05,815 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:02:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:02:05,815 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:02:05,816 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:02:05,816 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:02:05,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:02:05,866 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:02:05,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:08,717 INFO L124 PetriNetUnfolderBase]: 5491/20314 cut-off events. [2023-08-04 09:02:08,718 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:02:08,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24699 conditions, 20314 events. 5491/20314 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 213571 event pairs, 162 based on Foata normal form. 0/17344 useless extension candidates. Maximal degree in co-relation 12271. Up to 1024 conditions per place. [2023-08-04 09:02:08,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:08,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:08,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:02:08,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:08,990 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:08,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 361 transitions, 866 flow [2023-08-04 09:02:11,075 INFO L124 PetriNetUnfolderBase]: 5491/20314 cut-off events. [2023-08-04 09:02:11,076 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:02:11,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24699 conditions, 20314 events. 5491/20314 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 213571 event pairs, 162 based on Foata normal form. 0/17344 useless extension candidates. Maximal degree in co-relation 12271. Up to 1024 conditions per place. [2023-08-04 09:02:11,711 INFO L119 LiptonReduction]: Number of co-enabled transitions 20348 [2023-08-04 09:02:19,599 INFO L134 LiptonReduction]: Checked pairs total: 89664 [2023-08-04 09:02:19,600 INFO L136 LiptonReduction]: Total number of compositions: 290 [2023-08-04 09:02:19,607 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:02:19,607 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;@39b5b719, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:02:19,607 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:02:19,611 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:02:19,612 INFO L124 PetriNetUnfolderBase]: 6/67 cut-off events. [2023-08-04 09:02:19,612 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:02:19,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:02:19,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:02:19,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:02:19,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:02:19,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2098409830, now seen corresponding path program 1 times [2023-08-04 09:02:19,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:02:19,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606746394] [2023-08-04 09:02:19,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:02:19,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:02:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:02:19,650 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 09:02:19,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:02:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606746394] [2023-08-04 09:02:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606746394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:02:19,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:02:19,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:02:19,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759533402] [2023-08-04 09:02:19,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:02:19,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:02:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:02:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:02:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:02:19,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 651 [2023-08-04 09:02:19,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 118 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 282.6666666666667) internal successors, (848), 3 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:02:19,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:02:19,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 651 [2023-08-04 09:02:19,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand