./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 02:51:55,037 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:51:55,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:51:55,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:51:55,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:51:55,158 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:51:55,160 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:51:55,160 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:51:55,161 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:51:55,162 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:51:55,162 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:51:55,163 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:51:55,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:51:55,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:51:55,166 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:51:55,167 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:51:55,167 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:51:55,167 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:51:55,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:51:55,168 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:51:55,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:51:55,172 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:51:55,173 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:51:55,173 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:51:55,173 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:51:55,173 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:51:55,174 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:51:55,174 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:51:55,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:51:55,174 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:51:55,175 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:51:55,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:51:55,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:51:55,175 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:51:55,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:51:55,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:51:55,176 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:51:55,176 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:51:55,177 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:51:55,177 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:51:55,177 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:51:55,178 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:51:55,178 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-11-09 02:51:55,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:51:55,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:51:55,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:51:55,484 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:51:55,485 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:51:55,486 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-09 02:51:56,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:51:57,187 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:51:57,188 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-11-09 02:51:57,201 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63abeb892/e64cc3ce485c44dea1d3269ccf9cc122/FLAG4d4207716 [2024-11-09 02:51:57,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63abeb892/e64cc3ce485c44dea1d3269ccf9cc122 [2024-11-09 02:51:57,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:51:57,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:51:57,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:51:57,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:51:57,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:51:57,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,230 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71d4e576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57, skipping insertion in model container [2024-11-09 02:51:57,230 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,255 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:51:57,451 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-09 02:51:57,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:51:57,477 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:51:57,496 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c[2667,2680] [2024-11-09 02:51:57,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:51:57,516 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:51:57,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57 WrapperNode [2024-11-09 02:51:57,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:51:57,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:51:57,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:51:57,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:51:57,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,533 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,557 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2024-11-09 02:51:57,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:51:57,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:51:57,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:51:57,558 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:51:57,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,571 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,576 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,611 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 02:51:57,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,612 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,618 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:51:57,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:51:57,635 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:51:57,635 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:51:57,636 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (1/1) ... [2024-11-09 02:51:57,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:51:57,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:51:57,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 02:51:57,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 02:51:57,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:51:57,719 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 02:51:57,719 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 02:51:57,720 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 02:51:57,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 02:51:57,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:51:57,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:51:57,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 02:51:57,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 02:51:57,723 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:51:57,816 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:51:57,818 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:51:58,190 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:51:58,191 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:51:58,461 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:51:58,462 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 02:51:58,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:51:58 BoogieIcfgContainer [2024-11-09 02:51:58,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:51:58,467 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:51:58,467 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:51:58,471 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:51:58,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:51:57" (1/3) ... [2024-11-09 02:51:58,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be56d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:51:58, skipping insertion in model container [2024-11-09 02:51:58,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:51:57" (2/3) ... [2024-11-09 02:51:58,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be56d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:51:58, skipping insertion in model container [2024-11-09 02:51:58,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:51:58" (3/3) ... [2024-11-09 02:51:58,473 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-11-09 02:51:58,487 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:51:58,487 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:51:58,487 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:51:58,542 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 02:51:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-11-09 02:51:58,610 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-11-09 02:51:58,610 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:51:58,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-11-09 02:51:58,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-11-09 02:51:58,617 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-11-09 02:51:58,631 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:51:58,639 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@e45c7ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:51:58,640 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-09 02:51:58,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:51:58,648 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-11-09 02:51:58,648 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:51:58,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:51:58,651 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:51:58,652 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:51:58,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:51:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1958557296, now seen corresponding path program 1 times [2024-11-09 02:51:58,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:51:58,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210821206] [2024-11-09 02:51:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:51:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:51:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:51:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:51:59,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:51:59,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210821206] [2024-11-09 02:51:59,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210821206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:51:59,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:51:59,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 02:51:59,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103321236] [2024-11-09 02:51:59,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:51:59,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 02:51:59,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:51:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 02:51:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 02:51:59,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:51:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:51:59,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:51:59,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:51:59,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:51:59,287 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-11-09 02:51:59,291 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 02:51:59,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-11-09 02:51:59,294 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-11-09 02:51:59,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-11-09 02:51:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 02:51:59,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 02:51:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-11-09 02:51:59,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-09 02:51:59,312 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-11-09 02:51:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-11-09 02:51:59,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 02:51:59,320 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-11-09 02:51:59,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-11-09 02:51:59,326 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-11-09 02:51:59,326 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-11-09 02:51:59,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:51:59,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:51:59,328 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:51:59,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:51:59,329 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:51:59,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:51:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1419692673, now seen corresponding path program 1 times [2024-11-09 02:51:59,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:51:59,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057390321] [2024-11-09 02:51:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:51:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:51:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:51:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:51:59,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:51:59,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057390321] [2024-11-09 02:51:59,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057390321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:51:59,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:51:59,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:51:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497684763] [2024-11-09 02:51:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:51:59,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 02:51:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:51:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 02:51:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 02:51:59,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:51:59,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:51:59,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:51:59,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:51:59,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:00,075 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2024-11-09 02:52:00,076 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:52:00,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 68/120 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 307 event pairs, 1 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 243. Up to 80 conditions per place. [2024-11-09 02:52:00,078 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-11-09 02:52:00,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2024-11-09 02:52:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:52:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:52:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-09 02:52:00,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 02:52:00,081 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2024-11-09 02:52:00,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2024-11-09 02:52:00,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 02:52:00,086 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2024-11-09 02:52:00,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=27, PETRI_TRANSITIONS=29} [2024-11-09 02:52:00,087 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-11-09 02:52:00,088 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2024-11-09 02:52:00,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:00,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:00,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:00,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:52:00,090 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:00,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 760488887, now seen corresponding path program 2 times [2024-11-09 02:52:00,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:00,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967195366] [2024-11-09 02:52:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:00,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:00,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967195366] [2024-11-09 02:52:00,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967195366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:52:00,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:52:00,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:52:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92733193] [2024-11-09 02:52:00,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:52:00,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 02:52:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 02:52:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-09 02:52:00,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:00,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 29 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:00,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:00,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:00,655 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2024-11-09 02:52:00,655 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-11-09 02:52:00,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 134 events. 77/134 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 338 event pairs, 6 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 403. Up to 89 conditions per place. [2024-11-09 02:52:00,658 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-11-09 02:52:00,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2024-11-09 02:52:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:52:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:52:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-11-09 02:52:00,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-09 02:52:00,662 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2024-11-09 02:52:00,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2024-11-09 02:52:00,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-09 02:52:00,665 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2024-11-09 02:52:00,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-11-09 02:52:00,666 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-11-09 02:52:00,666 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2024-11-09 02:52:00,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:00,666 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:00,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:00,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 02:52:00,667 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:00,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1279489767, now seen corresponding path program 3 times [2024-11-09 02:52:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:00,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330389973] [2024-11-09 02:52:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:00,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:00,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330389973] [2024-11-09 02:52:00,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330389973] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:52:00,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:52:00,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:52:00,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907063878] [2024-11-09 02:52:00,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:52:00,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 02:52:00,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:00,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 02:52:00,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-09 02:52:00,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:00,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:00,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:00,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:00,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:01,024 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2024-11-09 02:52:01,025 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-09 02:52:01,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 147 events. 78/147 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 405 event pairs, 1 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 519. Up to 86 conditions per place. [2024-11-09 02:52:01,028 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 33 selfloop transitions, 19 changer transitions 2/55 dead transitions. [2024-11-09 02:52:01,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 379 flow [2024-11-09 02:52:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:52:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:52:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-09 02:52:01,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-09 02:52:01,032 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 6 states and 64 transitions. [2024-11-09 02:52:01,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 379 flow [2024-11-09 02:52:01,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 355 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-09 02:52:01,038 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 258 flow [2024-11-09 02:52:01,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2024-11-09 02:52:01,039 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-11-09 02:52:01,039 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 258 flow [2024-11-09 02:52:01,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:01,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:01,040 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:01,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 02:52:01,040 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:01,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:01,041 INFO L85 PathProgramCache]: Analyzing trace with hash -835769155, now seen corresponding path program 4 times [2024-11-09 02:52:01,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:01,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320563393] [2024-11-09 02:52:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:01,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:01,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:01,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320563393] [2024-11-09 02:52:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320563393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:52:01,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:52:01,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:52:01,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237450324] [2024-11-09 02:52:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:52:01,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 02:52:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 02:52:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 02:52:01,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:01,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:01,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:01,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:01,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:01,498 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2024-11-09 02:52:01,499 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-11-09 02:52:01,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 547 conditions, 134 events. 75/134 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 353 event pairs, 1 based on Foata normal form. 3/117 useless extension candidates. Maximal degree in co-relation 520. Up to 89 conditions per place. [2024-11-09 02:52:01,503 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 31 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2024-11-09 02:52:01,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 381 flow [2024-11-09 02:52:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:52:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:52:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-09 02:52:01,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 02:52:01,506 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 258 flow. Second operand 6 states and 60 transitions. [2024-11-09 02:52:01,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 381 flow [2024-11-09 02:52:01,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-09 02:52:01,512 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 277 flow [2024-11-09 02:52:01,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-09 02:52:01,516 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-11-09 02:52:01,517 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 277 flow [2024-11-09 02:52:01,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:01,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:01,517 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:01,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 02:52:01,517 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:01,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:01,518 INFO L85 PathProgramCache]: Analyzing trace with hash 839137127, now seen corresponding path program 5 times [2024-11-09 02:52:01,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:01,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660183280] [2024-11-09 02:52:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:01,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:01,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:01,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660183280] [2024-11-09 02:52:01,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660183280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:52:01,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:52:01,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:52:01,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352239375] [2024-11-09 02:52:01,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:52:01,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:52:01,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:01,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:52:01,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 02:52:01,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:01,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:01,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:01,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:01,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:01,828 INFO L124 PetriNetUnfolderBase]: 88/154 cut-off events. [2024-11-09 02:52:01,829 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-11-09 02:52:01,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 154 events. 88/154 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 416 event pairs, 20 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 605. Up to 113 conditions per place. [2024-11-09 02:52:01,831 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2024-11-09 02:52:01,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 411 flow [2024-11-09 02:52:01,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:52:01,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:52:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-11-09 02:52:01,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-11-09 02:52:01,832 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 277 flow. Second operand 5 states and 47 transitions. [2024-11-09 02:52:01,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 411 flow [2024-11-09 02:52:01,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 02:52:01,837 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 315 flow [2024-11-09 02:52:01,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-09 02:52:01,839 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-11-09 02:52:01,839 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 315 flow [2024-11-09 02:52:01,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:01,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:01,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:01,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 02:52:01,840 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:01,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash -945806931, now seen corresponding path program 6 times [2024-11-09 02:52:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:01,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559139519] [2024-11-09 02:52:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559139519] [2024-11-09 02:52:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559139519] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:52:02,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:52:02,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 02:52:02,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669474833] [2024-11-09 02:52:02,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:52:02,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:52:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:52:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 02:52:02,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:02,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:02,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:02,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:02,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:02,241 INFO L124 PetriNetUnfolderBase]: 92/170 cut-off events. [2024-11-09 02:52:02,243 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-11-09 02:52:02,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 170 events. 92/170 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 497 event pairs, 20 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 725. Up to 99 conditions per place. [2024-11-09 02:52:02,246 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 17 changer transitions 0/55 dead transitions. [2024-11-09 02:52:02,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 484 flow [2024-11-09 02:52:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:52:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:52:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-11-09 02:52:02,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-11-09 02:52:02,249 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 315 flow. Second operand 5 states and 48 transitions. [2024-11-09 02:52:02,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 484 flow [2024-11-09 02:52:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 02:52:02,255 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 347 flow [2024-11-09 02:52:02,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-09 02:52:02,256 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-11-09 02:52:02,256 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 347 flow [2024-11-09 02:52:02,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:02,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:02,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:02,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 02:52:02,257 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:02,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:02,257 INFO L85 PathProgramCache]: Analyzing trace with hash -804331554, now seen corresponding path program 1 times [2024-11-09 02:52:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064972486] [2024-11-09 02:52:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:02,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:02,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:02,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064972486] [2024-11-09 02:52:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064972486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:02,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496010168] [2024-11-09 02:52:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:02,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:02,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:02,467 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) [2024-11-09 02:52:02,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:52:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:02,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 02:52:02,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:02,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:03,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 02:52:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:03,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:04,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 02:52:04,029 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:04,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-09 02:52:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:04,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496010168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:04,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:04,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-09 02:52:04,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31510046] [2024-11-09 02:52:04,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:04,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 02:52:04,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:04,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 02:52:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-09 02:52:04,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:04,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 347 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:04,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:04,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:04,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:06,670 INFO L124 PetriNetUnfolderBase]: 189/373 cut-off events. [2024-11-09 02:52:06,670 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-11-09 02:52:06,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 373 events. 189/373 cut-off events. For 837/837 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1507 event pairs, 3 based on Foata normal form. 4/315 useless extension candidates. Maximal degree in co-relation 1580. Up to 117 conditions per place. [2024-11-09 02:52:06,674 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 79 selfloop transitions, 45 changer transitions 3/128 dead transitions. [2024-11-09 02:52:06,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 128 transitions, 1031 flow [2024-11-09 02:52:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 02:52:06,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 02:52:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-11-09 02:52:06,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-11-09 02:52:06,679 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 347 flow. Second operand 19 states and 169 transitions. [2024-11-09 02:52:06,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 128 transitions, 1031 flow [2024-11-09 02:52:06,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 128 transitions, 975 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-09 02:52:06,717 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 652 flow [2024-11-09 02:52:06,717 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=652, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-09 02:52:06,718 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-11-09 02:52:06,719 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 652 flow [2024-11-09 02:52:06,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:06,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:06,720 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:06,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 02:52:06,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:06,921 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:06,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1333235710, now seen corresponding path program 2 times [2024-11-09 02:52:06,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:06,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060066575] [2024-11-09 02:52:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:06,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:07,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060066575] [2024-11-09 02:52:07,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060066575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:07,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051570732] [2024-11-09 02:52:07,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:52:07,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:07,131 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) [2024-11-09 02:52:07,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 02:52:07,220 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:52:07,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:07,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 02:52:07,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:07,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:07,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 02:52:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:07,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:08,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 02:52:08,448 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:08,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-09 02:52:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:08,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051570732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:08,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-09 02:52:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789178557] [2024-11-09 02:52:08,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:08,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 02:52:08,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 02:52:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-09 02:52:08,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:08,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 652 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:08,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:08,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:08,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:10,126 INFO L124 PetriNetUnfolderBase]: 221/456 cut-off events. [2024-11-09 02:52:10,126 INFO L125 PetriNetUnfolderBase]: For 1850/1850 co-relation queries the response was YES. [2024-11-09 02:52:10,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2312 conditions, 456 events. 221/456 cut-off events. For 1850/1850 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2066 event pairs, 5 based on Foata normal form. 4/433 useless extension candidates. Maximal degree in co-relation 2271. Up to 149 conditions per place. [2024-11-09 02:52:10,131 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 86 selfloop transitions, 57 changer transitions 10/154 dead transitions. [2024-11-09 02:52:10,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1447 flow [2024-11-09 02:52:10,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 02:52:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 02:52:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2024-11-09 02:52:10,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-11-09 02:52:10,133 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 652 flow. Second operand 22 states and 194 transitions. [2024-11-09 02:52:10,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1447 flow [2024-11-09 02:52:10,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1273 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-11-09 02:52:10,144 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 816 flow [2024-11-09 02:52:10,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=816, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2024-11-09 02:52:10,146 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2024-11-09 02:52:10,146 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 816 flow [2024-11-09 02:52:10,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:10,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:10,146 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:10,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 02:52:10,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 02:52:10,347 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:10,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:10,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1411883950, now seen corresponding path program 3 times [2024-11-09 02:52:10,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:10,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436011393] [2024-11-09 02:52:10,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:10,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:10,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436011393] [2024-11-09 02:52:10,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436011393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:10,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881329866] [2024-11-09 02:52:10,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:52:10,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:10,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:10,544 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) [2024-11-09 02:52:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 02:52:10,621 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:52:10,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:10,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 02:52:10,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:10,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:10,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:52:10,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 109 [2024-11-09 02:52:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:11,026 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:11,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 02:52:11,679 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:11,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-09 02:52:11,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:11,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881329866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:11,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:11,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-09 02:52:11,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969390307] [2024-11-09 02:52:11,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:11,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 02:52:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 02:52:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-09 02:52:11,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:11,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 816 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:11,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:11,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:11,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:12,816 INFO L124 PetriNetUnfolderBase]: 216/441 cut-off events. [2024-11-09 02:52:12,817 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-11-09 02:52:12,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2291 conditions, 441 events. 216/441 cut-off events. For 2338/2338 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1941 event pairs, 5 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 2244. Up to 167 conditions per place. [2024-11-09 02:52:12,822 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 52 changer transitions 6/133 dead transitions. [2024-11-09 02:52:12,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1306 flow [2024-11-09 02:52:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 02:52:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 02:52:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-11-09 02:52:12,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2024-11-09 02:52:12,824 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 816 flow. Second operand 17 states and 151 transitions. [2024-11-09 02:52:12,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1306 flow [2024-11-09 02:52:12,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1218 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-09 02:52:12,835 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 831 flow [2024-11-09 02:52:12,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=831, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2024-11-09 02:52:12,835 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2024-11-09 02:52:12,836 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 831 flow [2024-11-09 02:52:12,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:12,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:12,836 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:12,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 02:52:13,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:13,037 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:13,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:13,038 INFO L85 PathProgramCache]: Analyzing trace with hash -995429169, now seen corresponding path program 1 times [2024-11-09 02:52:13,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:13,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391164399] [2024-11-09 02:52:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:13,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:13,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:13,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391164399] [2024-11-09 02:52:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391164399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:13,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788322862] [2024-11-09 02:52:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:13,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:13,167 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) [2024-11-09 02:52:13,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 02:52:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:13,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 02:52:13,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:13,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:13,533 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-11-09 02:52:13,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 88 [2024-11-09 02:52:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:13,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:15,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2024-11-09 02:52:15,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:52:15,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1184 treesize of output 868 [2024-11-09 02:52:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:36,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788322862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:36,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-11-09 02:52:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569623918] [2024-11-09 02:52:36,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:36,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 02:52:36,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 02:52:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-11-09 02:52:36,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:36,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 831 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:36,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:36,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:36,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:38,248 INFO L124 PetriNetUnfolderBase]: 461/899 cut-off events. [2024-11-09 02:52:38,249 INFO L125 PetriNetUnfolderBase]: For 5571/5571 co-relation queries the response was YES. [2024-11-09 02:52:38,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 899 events. 461/899 cut-off events. For 5571/5571 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4685 event pairs, 13 based on Foata normal form. 4/856 useless extension candidates. Maximal degree in co-relation 4497. Up to 294 conditions per place. [2024-11-09 02:52:38,257 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 118 selfloop transitions, 91 changer transitions 31/241 dead transitions. [2024-11-09 02:52:38,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2508 flow [2024-11-09 02:52:38,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 02:52:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 02:52:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-11-09 02:52:38,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-09 02:52:38,261 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 831 flow. Second operand 28 states and 231 transitions. [2024-11-09 02:52:38,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2508 flow [2024-11-09 02:52:38,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 2288 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-09 02:52:38,285 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 1554 flow [2024-11-09 02:52:38,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1554, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2024-11-09 02:52:38,286 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-11-09 02:52:38,287 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 1554 flow [2024-11-09 02:52:38,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:38,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:38,287 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:38,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 02:52:38,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:38,488 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:38,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1251118278, now seen corresponding path program 4 times [2024-11-09 02:52:38,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:38,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794568010] [2024-11-09 02:52:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:38,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794568010] [2024-11-09 02:52:38,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794568010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:38,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227436887] [2024-11-09 02:52:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:52:38,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:38,645 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) [2024-11-09 02:52:38,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 02:52:38,728 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:52:38,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:38,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 02:52:38,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:38,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 02:52:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:38,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:39,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:52:39,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 119 [2024-11-09 02:52:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:39,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227436887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:39,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:39,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-09 02:52:39,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176200319] [2024-11-09 02:52:39,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:39,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 02:52:39,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 02:52:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-09 02:52:39,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:39,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 1554 flow. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:39,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:39,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:39,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:40,404 INFO L124 PetriNetUnfolderBase]: 477/918 cut-off events. [2024-11-09 02:52:40,404 INFO L125 PetriNetUnfolderBase]: For 8382/8382 co-relation queries the response was YES. [2024-11-09 02:52:40,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 918 events. 477/918 cut-off events. For 8382/8382 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4750 event pairs, 33 based on Foata normal form. 7/925 useless extension candidates. Maximal degree in co-relation 5296. Up to 702 conditions per place. [2024-11-09 02:52:40,415 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 60 changer transitions 3/184 dead transitions. [2024-11-09 02:52:40,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 2260 flow [2024-11-09 02:52:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 02:52:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-09 02:52:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-11-09 02:52:40,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-11-09 02:52:40,417 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 1554 flow. Second operand 13 states and 113 transitions. [2024-11-09 02:52:40,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 2260 flow [2024-11-09 02:52:40,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 2094 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-11-09 02:52:40,465 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1770 flow [2024-11-09 02:52:40,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1770, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-11-09 02:52:40,469 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2024-11-09 02:52:40,469 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1770 flow [2024-11-09 02:52:40,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:40,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:40,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:40,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 02:52:40,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 02:52:40,671 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:40,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:40,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1172470038, now seen corresponding path program 5 times [2024-11-09 02:52:40,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:40,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245083569] [2024-11-09 02:52:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:40,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245083569] [2024-11-09 02:52:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245083569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144886431] [2024-11-09 02:52:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:52:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:40,814 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) [2024-11-09 02:52:40,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 02:52:40,897 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:52:40,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:40,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 02:52:40,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:41,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 93 [2024-11-09 02:52:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:41,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:41,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:52:41,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 142 [2024-11-09 02:52:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144886431] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:42,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:42,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-09 02:52:42,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292202376] [2024-11-09 02:52:42,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:42,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 02:52:42,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 02:52:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-09 02:52:42,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:42,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1770 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:42,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:42,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:42,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:44,210 INFO L124 PetriNetUnfolderBase]: 619/1243 cut-off events. [2024-11-09 02:52:44,210 INFO L125 PetriNetUnfolderBase]: For 11905/11905 co-relation queries the response was YES. [2024-11-09 02:52:44,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7326 conditions, 1243 events. 619/1243 cut-off events. For 11905/11905 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7279 event pairs, 52 based on Foata normal form. 8/1251 useless extension candidates. Maximal degree in co-relation 7125. Up to 431 conditions per place. [2024-11-09 02:52:44,221 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 166 selfloop transitions, 91 changer transitions 14/272 dead transitions. [2024-11-09 02:52:44,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 272 transitions, 3269 flow [2024-11-09 02:52:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 02:52:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 02:52:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 221 transitions. [2024-11-09 02:52:44,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-11-09 02:52:44,222 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1770 flow. Second operand 26 states and 221 transitions. [2024-11-09 02:52:44,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 272 transitions, 3269 flow [2024-11-09 02:52:44,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 272 transitions, 3213 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 02:52:44,263 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2314 flow [2024-11-09 02:52:44,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2314, PETRI_PLACES=156, PETRI_TRANSITIONS=182} [2024-11-09 02:52:44,264 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-11-09 02:52:44,264 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2314 flow [2024-11-09 02:52:44,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:44,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:44,265 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:44,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 02:52:44,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:44,466 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:44,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:44,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2031939214, now seen corresponding path program 6 times [2024-11-09 02:52:44,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297500687] [2024-11-09 02:52:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:44,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:44,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297500687] [2024-11-09 02:52:44,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297500687] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:44,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658652533] [2024-11-09 02:52:44,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 02:52:44,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:44,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:44,658 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) [2024-11-09 02:52:44,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 02:52:44,818 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-09 02:52:44,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:44,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 02:52:44,821 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:44,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:44,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658652533] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:44,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:44,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-11-09 02:52:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455972315] [2024-11-09 02:52:44,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:44,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 02:52:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 02:52:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-09 02:52:44,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:44,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 182 transitions, 2314 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:44,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:44,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:44,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:45,379 INFO L124 PetriNetUnfolderBase]: 638/1287 cut-off events. [2024-11-09 02:52:45,379 INFO L125 PetriNetUnfolderBase]: For 13934/13934 co-relation queries the response was YES. [2024-11-09 02:52:45,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7990 conditions, 1287 events. 638/1287 cut-off events. For 13934/13934 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7662 event pairs, 274 based on Foata normal form. 10/1297 useless extension candidates. Maximal degree in co-relation 7771. Up to 1097 conditions per place. [2024-11-09 02:52:45,391 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 166 selfloop transitions, 53 changer transitions 0/220 dead transitions. [2024-11-09 02:52:45,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 220 transitions, 2981 flow [2024-11-09 02:52:45,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 02:52:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 02:52:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-11-09 02:52:45,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-09 02:52:45,392 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2314 flow. Second operand 12 states and 100 transitions. [2024-11-09 02:52:45,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 220 transitions, 2981 flow [2024-11-09 02:52:45,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2874 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-09 02:52:45,452 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2482 flow [2024-11-09 02:52:45,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2482, PETRI_PLACES=160, PETRI_TRANSITIONS=196} [2024-11-09 02:52:45,453 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-11-09 02:52:45,453 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2482 flow [2024-11-09 02:52:45,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:45,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:45,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:45,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 02:52:45,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:45,654 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:45,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:45,655 INFO L85 PathProgramCache]: Analyzing trace with hash 982989216, now seen corresponding path program 7 times [2024-11-09 02:52:45,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:45,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821007863] [2024-11-09 02:52:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:45,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821007863] [2024-11-09 02:52:45,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821007863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:45,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32196195] [2024-11-09 02:52:45,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 02:52:45,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:45,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:52:45,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 02:52:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:45,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 02:52:45,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:45,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:46,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 02:52:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:46,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:53,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 02:52:53,367 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:53,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-09 02:52:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:53,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32196195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:53,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:53,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-11-09 02:52:53,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811857045] [2024-11-09 02:52:53,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:53,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 02:52:53,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:53,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 02:52:53,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-09 02:52:53,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:53,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 196 transitions, 2482 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:53,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:53,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:53,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:55,339 INFO L124 PetriNetUnfolderBase]: 640/1313 cut-off events. [2024-11-09 02:52:55,339 INFO L125 PetriNetUnfolderBase]: For 14986/14986 co-relation queries the response was YES. [2024-11-09 02:52:55,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8392 conditions, 1313 events. 640/1313 cut-off events. For 14986/14986 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7981 event pairs, 59 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 8235. Up to 946 conditions per place. [2024-11-09 02:52:55,355 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 130 selfloop transitions, 105 changer transitions 6/242 dead transitions. [2024-11-09 02:52:55,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 3360 flow [2024-11-09 02:52:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 02:52:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 02:52:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-11-09 02:52:55,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-11-09 02:52:55,357 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2482 flow. Second operand 19 states and 149 transitions. [2024-11-09 02:52:55,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 3360 flow [2024-11-09 02:52:55,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 3267 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-11-09 02:52:55,414 INFO L231 Difference]: Finished difference. Result has 178 places, 202 transitions, 2769 flow [2024-11-09 02:52:55,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2358, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2769, PETRI_PLACES=178, PETRI_TRANSITIONS=202} [2024-11-09 02:52:55,415 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2024-11-09 02:52:55,415 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 202 transitions, 2769 flow [2024-11-09 02:52:55,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:55,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:55,415 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:55,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 02:52:55,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 02:52:55,620 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:55,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1061637456, now seen corresponding path program 8 times [2024-11-09 02:52:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:55,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811175024] [2024-11-09 02:52:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:55,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:55,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811175024] [2024-11-09 02:52:55,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811175024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:55,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403680386] [2024-11-09 02:52:55,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:52:55,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:55,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:55,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:52:55,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 02:52:55,875 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:52:55,875 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:55,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 02:52:55,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:52:55,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 02:52:56,155 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:56,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 104 [2024-11-09 02:52:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:56,223 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:52:56,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 02:52:56,902 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 02:52:56,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-09 02:52:56,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-09 02:52:56,950 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-11-09 02:52:56,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 193 [2024-11-09 02:52:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:52:57,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403680386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:52:57,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:52:57,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-11-09 02:52:57,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468716790] [2024-11-09 02:52:57,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:52:57,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 02:52:57,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:52:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 02:52:57,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-09 02:52:57,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:52:57,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 202 transitions, 2769 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:57,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:52:57,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:52:57,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:52:59,388 INFO L124 PetriNetUnfolderBase]: 769/1569 cut-off events. [2024-11-09 02:52:59,388 INFO L125 PetriNetUnfolderBase]: For 23575/23575 co-relation queries the response was YES. [2024-11-09 02:52:59,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10723 conditions, 1569 events. 769/1569 cut-off events. For 23575/23575 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9948 event pairs, 78 based on Foata normal form. 9/1578 useless extension candidates. Maximal degree in co-relation 10552. Up to 793 conditions per place. [2024-11-09 02:52:59,402 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 141 selfloop transitions, 140 changer transitions 18/300 dead transitions. [2024-11-09 02:52:59,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 4468 flow [2024-11-09 02:52:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 02:52:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-09 02:52:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-11-09 02:52:59,404 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-11-09 02:52:59,404 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 2769 flow. Second operand 23 states and 204 transitions. [2024-11-09 02:52:59,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 4468 flow [2024-11-09 02:52:59,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 300 transitions, 4062 flow, removed 128 selfloop flow, removed 12 redundant places. [2024-11-09 02:52:59,473 INFO L231 Difference]: Finished difference. Result has 189 places, 232 transitions, 3378 flow [2024-11-09 02:52:59,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3378, PETRI_PLACES=189, PETRI_TRANSITIONS=232} [2024-11-09 02:52:59,474 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-11-09 02:52:59,474 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 232 transitions, 3378 flow [2024-11-09 02:52:59,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:52:59,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:52:59,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:52:59,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 02:52:59,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 02:52:59,679 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:52:59,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:52:59,679 INFO L85 PathProgramCache]: Analyzing trace with hash 183734254, now seen corresponding path program 9 times [2024-11-09 02:52:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:52:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559489300] [2024-11-09 02:52:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:52:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:52:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:52:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:52:59,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:52:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559489300] [2024-11-09 02:52:59,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559489300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:52:59,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169696334] [2024-11-09 02:52:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:52:59,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:52:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:52:59,824 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:52:59,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 02:52:59,910 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:52:59,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:52:59,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 02:52:59,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:00,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:53:00,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2024-11-09 02:53:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:53:00,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:00,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:53:00,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 158 [2024-11-09 02:53:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:53:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169696334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:00,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-11-09 02:53:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987077201] [2024-11-09 02:53:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:00,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 02:53:00,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:00,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 02:53:00,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-09 02:53:00,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:00,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 232 transitions, 3378 flow. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:00,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:00,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:00,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:01,464 INFO L124 PetriNetUnfolderBase]: 885/1848 cut-off events. [2024-11-09 02:53:01,464 INFO L125 PetriNetUnfolderBase]: For 29512/29512 co-relation queries the response was YES. [2024-11-09 02:53:01,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13105 conditions, 1848 events. 885/1848 cut-off events. For 29512/29512 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 12409 event pairs, 50 based on Foata normal form. 10/1858 useless extension candidates. Maximal degree in co-relation 12913. Up to 699 conditions per place. [2024-11-09 02:53:01,482 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 169 selfloop transitions, 151 changer transitions 5/326 dead transitions. [2024-11-09 02:53:01,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 326 transitions, 5180 flow [2024-11-09 02:53:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 02:53:01,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-09 02:53:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-11-09 02:53:01,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-11-09 02:53:01,484 INFO L175 Difference]: Start difference. First operand has 189 places, 232 transitions, 3378 flow. Second operand 17 states and 140 transitions. [2024-11-09 02:53:01,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 326 transitions, 5180 flow [2024-11-09 02:53:01,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 326 transitions, 5042 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-11-09 02:53:01,584 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 4277 flow [2024-11-09 02:53:01,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4277, PETRI_PLACES=206, PETRI_TRANSITIONS=266} [2024-11-09 02:53:01,585 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2024-11-09 02:53:01,585 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 4277 flow [2024-11-09 02:53:01,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:01,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:01,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:01,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 02:53:01,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 02:53:01,786 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:53:01,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 202168280, now seen corresponding path program 10 times [2024-11-09 02:53:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249392433] [2024-11-09 02:53:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:53:01,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249392433] [2024-11-09 02:53:01,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249392433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:01,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905231716] [2024-11-09 02:53:01,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:53:01,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:01,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:01,977 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:53:01,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 02:53:02,063 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:53:02,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:53:02,065 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 02:53:02,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:02,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:53:02,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2024-11-09 02:53:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:53:02,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:02,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:53:02,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-11-09 02:53:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 02:53:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905231716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:03,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-11-09 02:53:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319691009] [2024-11-09 02:53:03,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:03,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 02:53:03,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:03,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 02:53:03,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-09 02:53:03,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:03,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 266 transitions, 4277 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:03,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:03,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:03,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:04,117 INFO L124 PetriNetUnfolderBase]: 953/2127 cut-off events. [2024-11-09 02:53:04,117 INFO L125 PetriNetUnfolderBase]: For 37056/37056 co-relation queries the response was YES. [2024-11-09 02:53:04,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15538 conditions, 2127 events. 953/2127 cut-off events. For 37056/37056 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15733 event pairs, 6 based on Foata normal form. 4/2131 useless extension candidates. Maximal degree in co-relation 15316. Up to 1237 conditions per place. [2024-11-09 02:53:04,137 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 189 selfloop transitions, 138 changer transitions 20/348 dead transitions. [2024-11-09 02:53:04,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 348 transitions, 5951 flow [2024-11-09 02:53:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 02:53:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-09 02:53:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 124 transitions. [2024-11-09 02:53:04,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-09 02:53:04,139 INFO L175 Difference]: Start difference. First operand has 206 places, 266 transitions, 4277 flow. Second operand 16 states and 124 transitions. [2024-11-09 02:53:04,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 348 transitions, 5951 flow [2024-11-09 02:53:04,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 348 transitions, 5513 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-11-09 02:53:04,338 INFO L231 Difference]: Finished difference. Result has 216 places, 295 transitions, 4697 flow [2024-11-09 02:53:04,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4697, PETRI_PLACES=216, PETRI_TRANSITIONS=295} [2024-11-09 02:53:04,339 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 195 predicate places. [2024-11-09 02:53:04,339 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 295 transitions, 4697 flow [2024-11-09 02:53:04,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:04,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:04,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:04,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 02:53:04,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 02:53:04,540 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:53:04,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:04,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1297409021, now seen corresponding path program 11 times [2024-11-09 02:53:04,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:04,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323496384] [2024-11-09 02:53:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:04,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:05,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323496384] [2024-11-09 02:53:05,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323496384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:05,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877176159] [2024-11-09 02:53:05,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 02:53:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:05,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:53:05,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 02:53:05,122 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:53:05,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:53:05,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 02:53:05,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:05,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 02:53:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:05,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:06,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-11-09 02:53:06,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 02:53:06,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 192 [2024-11-09 02:53:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:07,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877176159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:07,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:07,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-09 02:53:07,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647275849] [2024-11-09 02:53:07,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:07,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 02:53:07,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 02:53:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2024-11-09 02:53:07,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:07,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 295 transitions, 4697 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:07,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:07,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:07,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:10,523 INFO L124 PetriNetUnfolderBase]: 927/2063 cut-off events. [2024-11-09 02:53:10,523 INFO L125 PetriNetUnfolderBase]: For 40477/40477 co-relation queries the response was YES. [2024-11-09 02:53:10,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15577 conditions, 2063 events. 927/2063 cut-off events. For 40477/40477 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15235 event pairs, 41 based on Foata normal form. 36/2099 useless extension candidates. Maximal degree in co-relation 15344. Up to 594 conditions per place. [2024-11-09 02:53:10,550 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 154 selfloop transitions, 41 changer transitions 251/447 dead transitions. [2024-11-09 02:53:10,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 447 transitions, 7320 flow [2024-11-09 02:53:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 02:53:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-09 02:53:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 266 transitions. [2024-11-09 02:53:10,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4290322580645161 [2024-11-09 02:53:10,553 INFO L175 Difference]: Start difference. First operand has 216 places, 295 transitions, 4697 flow. Second operand 31 states and 266 transitions. [2024-11-09 02:53:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 447 transitions, 7320 flow [2024-11-09 02:53:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 447 transitions, 7039 flow, removed 96 selfloop flow, removed 14 redundant places. [2024-11-09 02:53:10,766 INFO L231 Difference]: Finished difference. Result has 243 places, 161 transitions, 2367 flow [2024-11-09 02:53:10,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2367, PETRI_PLACES=243, PETRI_TRANSITIONS=161} [2024-11-09 02:53:10,767 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-11-09 02:53:10,767 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 161 transitions, 2367 flow [2024-11-09 02:53:10,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:10,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:10,767 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:10,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 02:53:10,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:10,968 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:53:10,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1947291036, now seen corresponding path program 2 times [2024-11-09 02:53:10,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482633664] [2024-11-09 02:53:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:11,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:11,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482633664] [2024-11-09 02:53:11,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482633664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:11,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859465582] [2024-11-09 02:53:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 02:53:11,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:11,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:53:11,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 02:53:11,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 02:53:11,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:53:11,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 02:53:11,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:11,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:11,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859465582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:11,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:11,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 02:53:11,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345737967] [2024-11-09 02:53:11,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:11,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 02:53:11,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 02:53:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-11-09 02:53:11,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:11,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 161 transitions, 2367 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:11,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:11,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:11,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:12,270 INFO L124 PetriNetUnfolderBase]: 461/1029 cut-off events. [2024-11-09 02:53:12,270 INFO L125 PetriNetUnfolderBase]: For 15493/15493 co-relation queries the response was YES. [2024-11-09 02:53:12,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7277 conditions, 1029 events. 461/1029 cut-off events. For 15493/15493 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6395 event pairs, 90 based on Foata normal form. 24/1053 useless extension candidates. Maximal degree in co-relation 7154. Up to 400 conditions per place. [2024-11-09 02:53:12,280 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 159 selfloop transitions, 97 changer transitions 0/257 dead transitions. [2024-11-09 02:53:12,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3873 flow [2024-11-09 02:53:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 02:53:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 02:53:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 173 transitions. [2024-11-09 02:53:12,283 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45526315789473687 [2024-11-09 02:53:12,283 INFO L175 Difference]: Start difference. First operand has 243 places, 161 transitions, 2367 flow. Second operand 19 states and 173 transitions. [2024-11-09 02:53:12,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3873 flow [2024-11-09 02:53:12,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 257 transitions, 3301 flow, removed 212 selfloop flow, removed 33 redundant places. [2024-11-09 02:53:12,373 INFO L231 Difference]: Finished difference. Result has 196 places, 196 transitions, 2809 flow [2024-11-09 02:53:12,373 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2809, PETRI_PLACES=196, PETRI_TRANSITIONS=196} [2024-11-09 02:53:12,374 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-11-09 02:53:12,374 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 196 transitions, 2809 flow [2024-11-09 02:53:12,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:12,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:12,374 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:12,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 02:53:12,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-09 02:53:12,575 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:53:12,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1568890344, now seen corresponding path program 3 times [2024-11-09 02:53:12,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:12,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026016218] [2024-11-09 02:53:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:12,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:12,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026016218] [2024-11-09 02:53:12,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026016218] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:12,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472330247] [2024-11-09 02:53:12,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 02:53:12,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:12,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:12,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:53:12,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 02:53:12,882 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 02:53:12,882 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:53:12,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 02:53:12,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:12,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:13,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472330247] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:13,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:13,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 02:53:13,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27377731] [2024-11-09 02:53:13,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:13,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 02:53:13,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:13,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 02:53:13,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-11-09 02:53:13,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:13,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 196 transitions, 2809 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:13,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:13,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:13,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:13,881 INFO L124 PetriNetUnfolderBase]: 731/1574 cut-off events. [2024-11-09 02:53:13,882 INFO L125 PetriNetUnfolderBase]: For 17246/17246 co-relation queries the response was YES. [2024-11-09 02:53:13,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10456 conditions, 1574 events. 731/1574 cut-off events. For 17246/17246 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10343 event pairs, 43 based on Foata normal form. 15/1589 useless extension candidates. Maximal degree in co-relation 10347. Up to 458 conditions per place. [2024-11-09 02:53:13,898 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 181 selfloop transitions, 166 changer transitions 0/348 dead transitions. [2024-11-09 02:53:13,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 348 transitions, 5351 flow [2024-11-09 02:53:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 02:53:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 02:53:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2024-11-09 02:53:13,900 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-11-09 02:53:13,900 INFO L175 Difference]: Start difference. First operand has 196 places, 196 transitions, 2809 flow. Second operand 21 states and 181 transitions. [2024-11-09 02:53:13,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 348 transitions, 5351 flow [2024-11-09 02:53:14,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 348 transitions, 5085 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-11-09 02:53:14,008 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 4346 flow [2024-11-09 02:53:14,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4346, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-11-09 02:53:14,009 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2024-11-09 02:53:14,009 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 4346 flow [2024-11-09 02:53:14,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:14,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:14,009 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:14,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 02:53:14,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:14,210 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-09 02:53:14,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1490242104, now seen corresponding path program 4 times [2024-11-09 02:53:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693623347] [2024-11-09 02:53:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:14,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:14,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693623347] [2024-11-09 02:53:14,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693623347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614284600] [2024-11-09 02:53:14,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 02:53:14,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:14,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:14,401 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 02:53:14,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 02:53:14,524 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 02:53:14,524 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 02:53:14,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 02:53:14,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:14,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 02:53:14,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614284600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:14,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:14,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 02:53:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794856680] [2024-11-09 02:53:14,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:14,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 02:53:14,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 02:53:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-11-09 02:53:14,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-11-09 02:53:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 4346 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 02:53:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-11-09 02:53:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand