/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-commit-1.wvr-bad_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:02:50,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:02:50,147 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:02:50,151 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:02:50,152 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:02:50,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:02:50,153 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:02:50,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:02:50,179 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:02:50,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:02:50,183 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:02:50,183 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:02:50,184 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:02:50,185 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:02:50,185 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:02:50,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:02:50,186 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:02:50,186 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:02:50,186 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:02:50,186 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:02:50,187 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:02:50,187 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:02:50,187 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:02:50,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:02:50,188 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:02:50,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:02:50,188 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:02:50,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:02:50,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:02:50,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:02:50,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:02:50,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:02:50,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:02:50,190 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:02:50,190 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:02:50,191 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:02:50,191 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:02:50,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:02:50,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:02:50,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:02:50,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:02:50,445 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:02:50,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-1.wvr-bad_bound2.c [2023-08-04 09:02:51,697 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:02:51,881 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:02:51,882 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-1.wvr-bad_bound2.c [2023-08-04 09:02:51,890 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a0c2e03/023ee37a740f47929043f89e28003053/FLAG7b42e1519 [2023-08-04 09:02:51,903 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a0c2e03/023ee37a740f47929043f89e28003053 [2023-08-04 09:02:51,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:02:51,907 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:02:51,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:02:51,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:02:51,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:02:51,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:02:51" (1/1) ... [2023-08-04 09:02:51,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71558836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:51, skipping insertion in model container [2023-08-04 09:02:51,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:02:51" (1/1) ... [2023-08-04 09:02:51,937 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:02:52,110 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-bad-commit-1.wvr-bad_bound2.c[5404,5417] [2023-08-04 09:02:52,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:02:52,124 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:02:52,156 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-commit-1.wvr-bad_bound2.c[5404,5417] [2023-08-04 09:02:52,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:02:52,167 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:02:52,167 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:02:52,173 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:02:52,174 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52 WrapperNode [2023-08-04 09:02:52,174 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:02:52,175 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:02:52,175 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:02:52,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:02:52,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,189 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,220 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 398 [2023-08-04 09:02:52,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:02:52,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:02:52,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:02:52,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:02:52,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,234 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,235 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,244 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,258 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,262 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,266 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:02:52,267 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:02:52,267 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:02:52,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:02:52,267 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (1/1) ... [2023-08-04 09:02:52,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:02:52,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:02:52,310 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 09:02:52,315 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 09:02:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:02:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:02:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:02:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:02:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:02:52,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:02:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:02:52,353 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:02:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:02:52,355 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:02:52,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:02:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:02:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:02:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:02:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:02:52,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:02:52,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:02:52,358 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 09:02:52,472 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:02:52,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:02:52,993 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:02:53,149 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:02:53,149 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:02:53,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:02:53 BoogieIcfgContainer [2023-08-04 09:02:53,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:02:53,155 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:02:53,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:02:53,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:02:53,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:02:51" (1/3) ... [2023-08-04 09:02:53,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed43f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:02:53, skipping insertion in model container [2023-08-04 09:02:53,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:02:52" (2/3) ... [2023-08-04 09:02:53,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ed43f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:02:53, skipping insertion in model container [2023-08-04 09:02:53,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:02:53" (3/3) ... [2023-08-04 09:02:53,161 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-bad-commit-1.wvr-bad_bound2.c [2023-08-04 09:02:53,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:02:53,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:02:53,174 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:02:53,174 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:02:53,235 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:02:53,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,484 INFO L124 PetriNetUnfolderBase]: 124/799 cut-off events. [2023-08-04 09:02:53,484 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:02:53,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 799 events. 124/799 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3426 event pairs, 0 based on Foata normal form. 0/665 useless extension candidates. Maximal degree in co-relation 482. Up to 16 conditions per place. [2023-08-04 09:02:53,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:02:53,530 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:02:53,664 INFO L124 PetriNetUnfolderBase]: 124/799 cut-off events. [2023-08-04 09:02:53,665 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:02:53,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 799 events. 124/799 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3426 event pairs, 0 based on Foata normal form. 0/665 useless extension candidates. Maximal degree in co-relation 482. Up to 16 conditions per place. [2023-08-04 09:02:53,685 INFO L119 LiptonReduction]: Number of co-enabled transitions 9072 [2023-08-04 09:03:03,022 INFO L134 LiptonReduction]: Checked pairs total: 11306 [2023-08-04 09:03:03,022 INFO L136 LiptonReduction]: Total number of compositions: 317 [2023-08-04 09:03:03,033 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:03,038 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;@21496cf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:03,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:03,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:03,047 INFO L124 PetriNetUnfolderBase]: 6/37 cut-off events. [2023-08-04 09:03:03,047 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:03,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:03,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:03,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash -430410755, now seen corresponding path program 1 times [2023-08-04 09:03:03,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:03,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311620427] [2023-08-04 09:03:03,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:03,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:03,350 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 09:03:03,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:03,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311620427] [2023-08-04 09:03:03,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311620427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:03,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:03,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:03,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525902596] [2023-08-04 09:03:03,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:03,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:03,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:03,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:03,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:03,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 50 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:03,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:03,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:03,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:03,762 INFO L124 PetriNetUnfolderBase]: 684/1080 cut-off events. [2023-08-04 09:03:03,762 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2023-08-04 09:03:03,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2207 conditions, 1080 events. 684/1080 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4207 event pairs, 188 based on Foata normal form. 0/661 useless extension candidates. Maximal degree in co-relation 1614. Up to 1001 conditions per place. [2023-08-04 09:03:03,768 INFO L140 encePairwiseOnDemand]: 628/632 looper letters, 43 selfloop transitions, 2 changer transitions 4/52 dead transitions. [2023-08-04 09:03:03,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 52 transitions, 238 flow [2023-08-04 09:03:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 861 transitions. [2023-08-04 09:03:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4541139240506329 [2023-08-04 09:03:03,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 861 transitions. [2023-08-04 09:03:03,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 861 transitions. [2023-08-04 09:03:03,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:03,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 861 transitions. [2023-08-04 09:03:03,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.0) internal successors, (861), 3 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:03,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:03,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:03,803 INFO L175 Difference]: Start difference. First operand has 42 places, 50 transitions, 142 flow. Second operand 3 states and 861 transitions. [2023-08-04 09:03:03,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 52 transitions, 238 flow [2023-08-04 09:03:03,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:03:03,809 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 136 flow [2023-08-04 09:03:03,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=44, PETRI_TRANSITIONS=46} [2023-08-04 09:03:03,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-04 09:03:03,814 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 136 flow [2023-08-04 09:03:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:03,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:03,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:03,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:03:03,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:03,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1498043000, now seen corresponding path program 1 times [2023-08-04 09:03:03,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:03,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257698823] [2023-08-04 09:03:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:03,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:03,935 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 09:03:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257698823] [2023-08-04 09:03:03,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257698823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:03,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791380546] [2023-08-04 09:03:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:03,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:03,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:03,949 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 09:03:03,972 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 09:03:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:04,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:04,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:04,079 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 09:03:04,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:04,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791380546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:04,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:04,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705570227] [2023-08-04 09:03:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:04,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:04,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:04,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:04,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 46 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:04,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:04,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:04,362 INFO L124 PetriNetUnfolderBase]: 652/1014 cut-off events. [2023-08-04 09:03:04,362 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 09:03:04,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080 conditions, 1014 events. 652/1014 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3564 event pairs, 189 based on Foata normal form. 0/620 useless extension candidates. Maximal degree in co-relation 2040. Up to 940 conditions per place. [2023-08-04 09:03:04,368 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 45 selfloop transitions, 2 changer transitions 1/51 dead transitions. [2023-08-04 09:03:04,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 242 flow [2023-08-04 09:03:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 862 transitions. [2023-08-04 09:03:04,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45464135021097046 [2023-08-04 09:03:04,371 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 862 transitions. [2023-08-04 09:03:04,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 862 transitions. [2023-08-04 09:03:04,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:04,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 862 transitions. [2023-08-04 09:03:04,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 287.3333333333333) internal successors, (862), 3 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,379 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 136 flow. Second operand 3 states and 862 transitions. [2023-08-04 09:03:04,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 242 flow [2023-08-04 09:03:04,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 226 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:03:04,382 INFO L231 Difference]: Finished difference. Result has 39 places, 46 transitions, 128 flow [2023-08-04 09:03:04,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=39, PETRI_TRANSITIONS=46} [2023-08-04 09:03:04,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-04 09:03:04,383 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 46 transitions, 128 flow [2023-08-04 09:03:04,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.3333333333333) internal successors, (826), 3 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:04,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:04,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:03:04,589 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 09:03:04,590 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:04,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1393103198, now seen corresponding path program 1 times [2023-08-04 09:03:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:04,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757512793] [2023-08-04 09:03:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:04,718 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 09:03:04,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757512793] [2023-08-04 09:03:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757512793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:04,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502872739] [2023-08-04 09:03:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:04,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:04,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:04,721 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 09:03:04,723 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 09:03:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:04,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:04,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:04,863 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 09:03:04,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502872739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:04,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:04,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:04,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51313830] [2023-08-04 09:03:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:04,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:04,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:04,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:04,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:04,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:04,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:05,147 INFO L124 PetriNetUnfolderBase]: 648/1010 cut-off events. [2023-08-04 09:03:05,147 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 09:03:05,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2077 conditions, 1010 events. 648/1010 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3321 event pairs, 194 based on Foata normal form. 0/624 useless extension candidates. Maximal degree in co-relation 1088. Up to 902 conditions per place. [2023-08-04 09:03:05,153 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 47 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2023-08-04 09:03:05,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 53 transitions, 242 flow [2023-08-04 09:03:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-08-04 09:03:05,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2023-08-04 09:03:05,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-08-04 09:03:05,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-08-04 09:03:05,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:05,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-08-04 09:03:05,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,163 INFO L175 Difference]: Start difference. First operand has 39 places, 46 transitions, 128 flow. Second operand 3 states and 864 transitions. [2023-08-04 09:03:05,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 53 transitions, 242 flow [2023-08-04 09:03:05,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:05,167 INFO L231 Difference]: Finished difference. Result has 40 places, 46 transitions, 132 flow [2023-08-04 09:03:05,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=40, PETRI_TRANSITIONS=46} [2023-08-04 09:03:05,169 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-04 09:03:05,169 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 46 transitions, 132 flow [2023-08-04 09:03:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.3333333333333) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:05,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:05,176 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 09:03:05,375 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 09:03:05,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:05,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash -162256931, now seen corresponding path program 1 times [2023-08-04 09:03:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913250184] [2023-08-04 09:03:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:05,444 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 09:03:05,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913250184] [2023-08-04 09:03:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913250184] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932286267] [2023-08-04 09:03:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:05,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:05,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:05,446 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 09:03:05,449 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 09:03:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:05,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:05,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:05,564 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 09:03:05,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:05,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932286267] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:05,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:05,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:05,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866976718] [2023-08-04 09:03:05,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:05,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:05,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:05,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:05,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:05,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:05,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 46 transitions, 132 flow. Second operand has 3 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 09:03:05,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:05,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:05,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:05,816 INFO L124 PetriNetUnfolderBase]: 456/730 cut-off events. [2023-08-04 09:03:05,816 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 09:03:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1540 conditions, 730 events. 456/730 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2218 event pairs, 169 based on Foata normal form. 0/460 useless extension candidates. Maximal degree in co-relation 836. Up to 598 conditions per place. [2023-08-04 09:03:05,822 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 52 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-04 09:03:05,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 268 flow [2023-08-04 09:03:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 09:03:05,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578059071729958 [2023-08-04 09:03:05,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 09:03:05,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 09:03:05,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:05,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 09:03:05,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:05,835 INFO L175 Difference]: Start difference. First operand has 40 places, 46 transitions, 132 flow. Second operand 3 states and 868 transitions. [2023-08-04 09:03:05,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 268 flow [2023-08-04 09:03:05,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 57 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:03:05,839 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 140 flow [2023-08-04 09:03:05,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2023-08-04 09:03:05,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-04 09:03:05,841 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 140 flow [2023-08-04 09:03:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:03:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:05,842 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] [2023-08-04 09:03:05,851 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 09:03:06,048 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 09:03:06,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:06,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1680528868, now seen corresponding path program 1 times [2023-08-04 09:03:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265028480] [2023-08-04 09:03:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:06,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:06,125 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 09:03:06,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265028480] [2023-08-04 09:03:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265028480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:06,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910363493] [2023-08-04 09:03:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:06,130 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 09:03:06,133 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 09:03:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:06,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:06,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:06,249 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 09:03:06,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:06,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910363493] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:06,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:06,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:03:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914046961] [2023-08-04 09:03:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:06,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:06,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 140 flow. Second operand has 3 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 09:03:06,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:06,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:06,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:06,461 INFO L124 PetriNetUnfolderBase]: 374/616 cut-off events. [2023-08-04 09:03:06,461 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-04 09:03:06,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1355 conditions, 616 events. 374/616 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1756 event pairs, 146 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 737. Up to 470 conditions per place. [2023-08-04 09:03:06,464 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 53 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 09:03:06,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 278 flow [2023-08-04 09:03:06,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:06,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 868 transitions. [2023-08-04 09:03:06,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4578059071729958 [2023-08-04 09:03:06,467 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 868 transitions. [2023-08-04 09:03:06,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 868 transitions. [2023-08-04 09:03:06,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:06,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 868 transitions. [2023-08-04 09:03:06,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.3333333333333) internal successors, (868), 3 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:06,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:06,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:06,474 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 140 flow. Second operand 3 states and 868 transitions. [2023-08-04 09:03:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 278 flow [2023-08-04 09:03:06,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 58 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:06,476 INFO L231 Difference]: Finished difference. Result has 43 places, 48 transitions, 150 flow [2023-08-04 09:03:06,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=43, PETRI_TRANSITIONS=48} [2023-08-04 09:03:06,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-04 09:03:06,477 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 48 transitions, 150 flow [2023-08-04 09:03:06,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:03:06,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:06,478 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 09:03:06,484 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 09:03:06,684 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 09:03:06,684 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:06,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1674467853, now seen corresponding path program 1 times [2023-08-04 09:03:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351493546] [2023-08-04 09:03:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:06,755 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 09:03:06,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351493546] [2023-08-04 09:03:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351493546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:06,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137801474] [2023-08-04 09:03:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:06,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:06,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:06,757 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 09:03:06,760 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 09:03:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:06,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:03:06,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:06,888 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 09:03:06,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:03:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137801474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:03:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:03:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936329950] [2023-08-04 09:03:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:06,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:06,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 632 [2023-08-04 09:03:06,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 48 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:06,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:06,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 632 [2023-08-04 09:03:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:07,075 INFO L124 PetriNetUnfolderBase]: 367/605 cut-off events. [2023-08-04 09:03:07,075 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 09:03:07,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363 conditions, 605 events. 367/605 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1705 event pairs, 171 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 900. Up to 549 conditions per place. [2023-08-04 09:03:07,079 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 47 selfloop transitions, 2 changer transitions 3/55 dead transitions. [2023-08-04 09:03:07,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 268 flow [2023-08-04 09:03:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:03:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:03:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-08-04 09:03:07,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45569620253164556 [2023-08-04 09:03:07,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-08-04 09:03:07,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-08-04 09:03:07,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:07,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-08-04 09:03:07,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 632.0) internal successors, (2528), 4 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,088 INFO L175 Difference]: Start difference. First operand has 43 places, 48 transitions, 150 flow. Second operand 3 states and 864 transitions. [2023-08-04 09:03:07,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 268 flow [2023-08-04 09:03:07,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:07,090 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 148 flow [2023-08-04 09:03:07,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-04 09:03:07,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2023-08-04 09:03:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 148 flow [2023-08-04 09:03:07,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:07,092 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] [2023-08-04 09:03:07,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:03:07,298 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 09:03:07,299 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:07,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1236556582, now seen corresponding path program 1 times [2023-08-04 09:03:07,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:07,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494150547] [2023-08-04 09:03:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:07,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:07,398 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 09:03:07,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:07,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494150547] [2023-08-04 09:03:07,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494150547] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:03:07,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221479393] [2023-08-04 09:03:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:07,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:03:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:03:07,401 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 09:03:07,426 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 09:03:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:07,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:03:07,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:03:07,583 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 09:03:07,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:03:07,604 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 09:03:07,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221479393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:03:07,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:03:07,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:03:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286780420] [2023-08-04 09:03:07,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:03:07,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:03:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:03:07,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:03:07,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 632 [2023-08-04 09:03:07,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:07,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 632 [2023-08-04 09:03:07,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:03:07,659 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 09:03:07,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:07,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 19 events. 8/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 2/16 useless extension candidates. Maximal degree in co-relation 41. Up to 8 conditions per place. [2023-08-04 09:03:07,660 INFO L140 encePairwiseOnDemand]: 629/632 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-04 09:03:07,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 15 transitions, 64 flow [2023-08-04 09:03:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:03:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:03:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1096 transitions. [2023-08-04 09:03:07,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43354430379746833 [2023-08-04 09:03:07,664 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1096 transitions. [2023-08-04 09:03:07,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1096 transitions. [2023-08-04 09:03:07,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:03:07,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1096 transitions. [2023-08-04 09:03:07,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 632.0) internal successors, (3160), 5 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,672 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 632.0) internal successors, (3160), 5 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,673 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 148 flow. Second operand 4 states and 1096 transitions. [2023-08-04 09:03:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 15 transitions, 64 flow [2023-08-04 09:03:07,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:03:07,673 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:03:07,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=632, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=18, 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=21, PETRI_TRANSITIONS=0} [2023-08-04 09:03:07,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -21 predicate places. [2023-08-04 09:03:07,675 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:03:07,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 277.2) internal successors, (1386), 5 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:07,679 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:03:07,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:03:07,887 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 09:03:07,888 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:07,889 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:03:07,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:07,987 INFO L124 PetriNetUnfolderBase]: 124/799 cut-off events. [2023-08-04 09:03:07,987 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:03:07,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 799 events. 124/799 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3426 event pairs, 0 based on Foata normal form. 0/665 useless extension candidates. Maximal degree in co-relation 482. Up to 16 conditions per place. [2023-08-04 09:03:07,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:07,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:07,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:07,997 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:07,997 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 280 places, 315 transitions, 672 flow [2023-08-04 09:03:08,087 INFO L124 PetriNetUnfolderBase]: 124/799 cut-off events. [2023-08-04 09:03:08,087 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:03:08,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 799 events. 124/799 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3426 event pairs, 0 based on Foata normal form. 0/665 useless extension candidates. Maximal degree in co-relation 482. Up to 16 conditions per place. [2023-08-04 09:03:08,105 INFO L119 LiptonReduction]: Number of co-enabled transitions 9072 [2023-08-04 09:03:17,316 INFO L134 LiptonReduction]: Checked pairs total: 11486 [2023-08-04 09:03:17,316 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-04 09:03:17,317 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:03:17,318 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;@21496cf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:17,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:03:17,323 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:17,323 INFO L124 PetriNetUnfolderBase]: 6/35 cut-off events. [2023-08-04 09:03:17,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:03:17,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:17,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:17,323 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:03:17,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:17,324 INFO L85 PathProgramCache]: Analyzing trace with hash -352448169, now seen corresponding path program 1 times [2023-08-04 09:03:17,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:17,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285782581] [2023-08-04 09:03:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:17,375 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:03:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:03:17,435 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:03:17,435 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:03:17,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:03:17,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:03:17,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:03:17,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 09:03:17,438 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:03:17,439 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:03:17,439 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:03:17,439 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:03:17,480 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:03:17,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,273 INFO L124 PetriNetUnfolderBase]: 954/4370 cut-off events. [2023-08-04 09:03:18,273 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:03:18,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4370 events. 954/4370 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33703 event pairs, 15 based on Foata normal form. 0/3660 useless extension candidates. Maximal degree in co-relation 2642. Up to 192 conditions per place. [2023-08-04 09:03:18,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,353 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:03:18,353 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,353 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 375 transitions, 840 flow [2023-08-04 09:03:18,969 INFO L124 PetriNetUnfolderBase]: 954/4370 cut-off events. [2023-08-04 09:03:18,970 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:03:19,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4370 events. 954/4370 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 33703 event pairs, 15 based on Foata normal form. 0/3660 useless extension candidates. Maximal degree in co-relation 2642. Up to 192 conditions per place. [2023-08-04 09:03:19,133 INFO L119 LiptonReduction]: Number of co-enabled transitions 24792 [2023-08-04 09:03:26,503 INFO L134 LiptonReduction]: Checked pairs total: 114189 [2023-08-04 09:03:26,504 INFO L136 LiptonReduction]: Total number of compositions: 323 [2023-08-04 09:03:26,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:03:26,507 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;@21496cf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:03:26,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:03:26,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:03:26,511 INFO L124 PetriNetUnfolderBase]: 12/51 cut-off events. [2023-08-04 09:03:26,511 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 09:03:26,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:03:26,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:03:26,512 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:03:26,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:03:26,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1200472701, now seen corresponding path program 1 times [2023-08-04 09:03:26,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:03:26,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881864366] [2023-08-04 09:03:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:03:26,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:03:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:03:26,545 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 09:03:26,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:03:26,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881864366] [2023-08-04 09:03:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881864366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:03:26,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:03:26,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:03:26,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287758310] [2023-08-04 09:03:26,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:03:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:03:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:03:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:03:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:03:26,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 698 [2023-08-04 09:03:26,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 113 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:03:26,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:03:26,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 698 [2023-08-04 09:03:26,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:05:17,959 INFO L124 PetriNetUnfolderBase]: 1229623/1462199 cut-off events. [2023-08-04 09:05:17,960 INFO L125 PetriNetUnfolderBase]: For 112404/112404 co-relation queries the response was YES. [2023-08-04 09:05:24,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2901672 conditions, 1462199 events. 1229623/1462199 cut-off events. For 112404/112404 co-relation queries the response was YES. Maximal size of possible extension queue 21648. Compared 7393015 event pairs, 502902 based on Foata normal form. 0/967164 useless extension candidates. Maximal degree in co-relation 781048. Up to 1373504 conditions per place. [2023-08-04 09:05:33,575 INFO L140 encePairwiseOnDemand]: 694/698 looper letters, 90 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-04 09:05:33,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 121 transitions, 516 flow [2023-08-04 09:05:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:05:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:05:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1018 transitions. [2023-08-04 09:05:33,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615090735434574 [2023-08-04 09:05:33,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1018 transitions. [2023-08-04 09:05:33,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1018 transitions. [2023-08-04 09:05:33,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:05:33,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1018 transitions. [2023-08-04 09:05:33,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.3333333333333) internal successors, (1018), 3 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:33,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 698.0) internal successors, (2792), 4 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:33,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 698.0) internal successors, (2792), 4 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:33,588 INFO L175 Difference]: Start difference. First operand has 83 places, 113 transitions, 316 flow. Second operand 3 states and 1018 transitions. [2023-08-04 09:05:33,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 121 transitions, 516 flow [2023-08-04 09:05:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 516 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:05:33,794 INFO L231 Difference]: Finished difference. Result has 85 places, 113 transitions, 326 flow [2023-08-04 09:05:33,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=698, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=85, PETRI_TRANSITIONS=113} [2023-08-04 09:05:33,797 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 2 predicate places. [2023-08-04 09:05:33,797 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 113 transitions, 326 flow [2023-08-04 09:05:33,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:33,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:05:33,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:05:33,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 09:05:33,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:05:33,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:05:33,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1108665552, now seen corresponding path program 1 times [2023-08-04 09:05:33,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:05:33,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231558842] [2023-08-04 09:05:33,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:33,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:05:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:33,892 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 09:05:33,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:05:33,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231558842] [2023-08-04 09:05:33,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231558842] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:05:33,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139052221] [2023-08-04 09:05:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:05:33,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:05:33,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:05:33,895 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 09:05:33,896 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 09:05:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:05:34,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:05:34,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:05:34,045 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 09:05:34,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:05:34,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139052221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:05:34,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:05:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:05:34,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419251525] [2023-08-04 09:05:34,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:05:34,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:05:34,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:05:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:05:34,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:05:34,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 698 [2023-08-04 09:05:34,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 113 transitions, 326 flow. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:05:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:05:34,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 698 [2023-08-04 09:05:34,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand