./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/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-dev-4a390ef-m [2024-10-24 12:38:47,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:38:47,377 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:38:47,383 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:38:47,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:38:47,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:38:47,416 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:38:47,417 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:38:47,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:38:47,421 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:38:47,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:38:47,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:38:47,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:38:47,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:38:47,423 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:38:47,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:38:47,424 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:38:47,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:38:47,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:38:47,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:38:47,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:38:47,426 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:38:47,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:38:47,427 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:38:47,427 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:38:47,427 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:38:47,428 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:38:47,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:38:47,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:38:47,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:38:47,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:38:47,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:38:47,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:38:47,430 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:38:47,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:38:47,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:38:47,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:38:47,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:38:47,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:38:47,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:38:47,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:38:47,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:38:47,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-10-24 12:38:47,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:38:47,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:38:47,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:38:47,740 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:38:47,741 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:38:47,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-24 12:38:49,210 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:38:49,402 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:38:49,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-24 12:38:49,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8a71cbb/9b4d41e16958483792728e137205f52c/FLAG572dc02af [2024-10-24 12:38:49,429 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee8a71cbb/9b4d41e16958483792728e137205f52c [2024-10-24 12:38:49,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:38:49,433 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:38:49,434 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:38:49,434 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:38:49,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:38:49,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f806745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49, skipping insertion in model container [2024-10-24 12:38:49,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,462 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:38:49,708 WARN L248 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] [2024-10-24 12:38:49,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:38:49,727 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:38:49,750 WARN L248 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] [2024-10-24 12:38:49,757 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:38:49,779 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:38:49,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49 WrapperNode [2024-10-24 12:38:49,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:38:49,782 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:38:49,782 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:38:49,782 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:38:49,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,820 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2024-10-24 12:38:49,820 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:38:49,821 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:38:49,821 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:38:49,821 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:38:49,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,851 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]. [2024-10-24 12:38:49,852 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,852 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,858 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,861 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,863 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,864 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,870 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:38:49,871 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:38:49,871 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:38:49,871 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:38:49,872 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (1/1) ... [2024-10-24 12:38:49,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:38:49,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:49,902 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) [2024-10-24 12:38:49,904 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 [2024-10-24 12:38:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:38:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:38:49,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:38:49,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:38:49,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:38:49,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 12:38:49,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 12:38:49,944 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:38:50,031 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:38:50,032 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:38:50,305 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:38:50,305 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:38:50,568 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:38:50,568 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 12:38:50,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:50 BoogieIcfgContainer [2024-10-24 12:38:50,569 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:38:50,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:38:50,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:38:50,577 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:38:50,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:38:49" (1/3) ... [2024-10-24 12:38:50,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d120f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:50, skipping insertion in model container [2024-10-24 12:38:50,579 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:38:49" (2/3) ... [2024-10-24 12:38:50,579 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d120f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:38:50, skipping insertion in model container [2024-10-24 12:38:50,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:38:50" (3/3) ... [2024-10-24 12:38:50,581 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-10-24 12:38:50,599 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:38:50,599 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:38:50,600 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:38:50,649 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 12:38:50,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-24 12:38:50,737 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-24 12:38:50,737 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:50,740 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. [2024-10-24 12:38:50,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-24 12:38:50,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-24 12:38:50,754 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:38:50,763 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;@2cdad8b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:38:50,763 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-24 12:38:50,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:38:50,779 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-24 12:38:50,779 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:50,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:50,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:50,780 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:50,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:50,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1958557296, now seen corresponding path program 1 times [2024-10-24 12:38:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:50,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684431869] [2024-10-24 12:38:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:50,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684431869] [2024-10-24 12:38:51,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684431869] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:51,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:51,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:38:51,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561578813] [2024-10-24 12:38:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:51,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:38:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:51,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:38:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:38:51,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:51,286 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) [2024-10-24 12:38:51,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:51,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:51,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:51,371 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-24 12:38:51,371 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 12:38:51,372 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. [2024-10-24 12:38:51,374 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-24 12:38:51,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-24 12:38:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:38:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:38:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-24 12:38:51,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-24 12:38:51,386 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-24 12:38:51,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-24 12:38:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 12:38:51,390 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-24 12:38:51,392 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} [2024-10-24 12:38:51,395 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-24 12:38:51,396 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-24 12:38:51,396 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) [2024-10-24 12:38:51,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:51,396 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:51,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:38:51,397 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:51,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1419692673, now seen corresponding path program 1 times [2024-10-24 12:38:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:51,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116174018] [2024-10-24 12:38:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:51,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:51,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116174018] [2024-10-24 12:38:51,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116174018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:51,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:51,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:51,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284733643] [2024-10-24 12:38:51,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:51,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:51,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:51,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:51,905 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) [2024-10-24 12:38:51,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:51,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:51,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:52,174 INFO L124 PetriNetUnfolderBase]: 68/120 cut-off events. [2024-10-24 12:38:52,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 12:38:52,175 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. [2024-10-24 12:38:52,177 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 30 selfloop transitions, 12 changer transitions 0/43 dead transitions. [2024-10-24 12:38:52,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 43 transitions, 189 flow [2024-10-24 12:38:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:38:52,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:38:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-24 12:38:52,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-24 12:38:52,180 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 60 transitions. [2024-10-24 12:38:52,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 43 transitions, 189 flow [2024-10-24 12:38:52,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 12:38:52,181 INFO L231 Difference]: Finished difference. Result has 27 places, 29 transitions, 117 flow [2024-10-24 12:38:52,181 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} [2024-10-24 12:38:52,183 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2024-10-24 12:38:52,183 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 29 transitions, 117 flow [2024-10-24 12:38:52,184 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) [2024-10-24 12:38:52,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:52,184 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:52,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:38:52,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:52,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 760488887, now seen corresponding path program 2 times [2024-10-24 12:38:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:52,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403636368] [2024-10-24 12:38:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:52,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:52,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:52,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403636368] [2024-10-24 12:38:52,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403636368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:52,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:52,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:52,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732028515] [2024-10-24 12:38:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:52,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:52,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:52,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:52,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:52,546 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) [2024-10-24 12:38:52,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:52,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:52,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:52,723 INFO L124 PetriNetUnfolderBase]: 77/134 cut-off events. [2024-10-24 12:38:52,724 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-24 12:38:52,725 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. [2024-10-24 12:38:52,727 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 28 selfloop transitions, 18 changer transitions 0/47 dead transitions. [2024-10-24 12:38:52,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 278 flow [2024-10-24 12:38:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:38:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:38:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-10-24 12:38:52,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-24 12:38:52,732 INFO L175 Difference]: Start difference. First operand has 27 places, 29 transitions, 117 flow. Second operand 6 states and 58 transitions. [2024-10-24 12:38:52,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 278 flow [2024-10-24 12:38:52,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-24 12:38:52,736 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 212 flow [2024-10-24 12:38:52,737 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} [2024-10-24 12:38:52,738 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-24 12:38:52,739 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 212 flow [2024-10-24 12:38:52,739 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) [2024-10-24 12:38:52,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:52,740 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:52,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:38:52,740 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:52,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:52,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1279489767, now seen corresponding path program 3 times [2024-10-24 12:38:52,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:52,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462149861] [2024-10-24 12:38:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:52,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462149861] [2024-10-24 12:38:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462149861] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:53,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:53,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887544722] [2024-10-24 12:38:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:53,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:53,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:53,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:53,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:53,035 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) [2024-10-24 12:38:53,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:53,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:53,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:53,162 INFO L124 PetriNetUnfolderBase]: 78/147 cut-off events. [2024-10-24 12:38:53,163 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-10-24 12:38:53,164 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. [2024-10-24 12:38:53,165 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 33 selfloop transitions, 19 changer transitions 2/55 dead transitions. [2024-10-24 12:38:53,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 379 flow [2024-10-24 12:38:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:38:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:38:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-10-24 12:38:53,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-10-24 12:38:53,167 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 212 flow. Second operand 6 states and 64 transitions. [2024-10-24 12:38:53,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 379 flow [2024-10-24 12:38:53,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 355 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-24 12:38:53,171 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 258 flow [2024-10-24 12:38:53,171 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} [2024-10-24 12:38:53,172 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 20 predicate places. [2024-10-24 12:38:53,172 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 258 flow [2024-10-24 12:38:53,173 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) [2024-10-24 12:38:53,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:53,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:53,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:38:53,173 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:53,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash -835769155, now seen corresponding path program 4 times [2024-10-24 12:38:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413191368] [2024-10-24 12:38:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:53,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413191368] [2024-10-24 12:38:53,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413191368] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:53,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:53,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:53,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499637238] [2024-10-24 12:38:53,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:53,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:38:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:38:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:38:53,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:53,478 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) [2024-10-24 12:38:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:53,623 INFO L124 PetriNetUnfolderBase]: 75/134 cut-off events. [2024-10-24 12:38:53,623 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-10-24 12:38:53,625 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. [2024-10-24 12:38:53,627 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 31 selfloop transitions, 18 changer transitions 0/50 dead transitions. [2024-10-24 12:38:53,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 381 flow [2024-10-24 12:38:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:38:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:38:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-24 12:38:53,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-24 12:38:53,630 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 258 flow. Second operand 6 states and 60 transitions. [2024-10-24 12:38:53,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 381 flow [2024-10-24 12:38:53,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 50 transitions, 357 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-24 12:38:53,636 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 277 flow [2024-10-24 12:38:53,637 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} [2024-10-24 12:38:53,638 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2024-10-24 12:38:53,639 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 277 flow [2024-10-24 12:38:53,639 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) [2024-10-24 12:38:53,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:53,639 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:53,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:38:53,640 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:53,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash 839137127, now seen corresponding path program 5 times [2024-10-24 12:38:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601515053] [2024-10-24 12:38:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601515053] [2024-10-24 12:38:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601515053] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:53,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:53,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:53,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972490537] [2024-10-24 12:38:53,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:53,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:38:53,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:53,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:38:53,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:38:53,815 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:53,815 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) [2024-10-24 12:38:53,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:53,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:53,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:53,934 INFO L124 PetriNetUnfolderBase]: 88/154 cut-off events. [2024-10-24 12:38:53,935 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2024-10-24 12:38:53,936 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. [2024-10-24 12:38:53,939 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 30 selfloop transitions, 18 changer transitions 0/49 dead transitions. [2024-10-24 12:38:53,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 411 flow [2024-10-24 12:38:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:38:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:38:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2024-10-24 12:38:53,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-10-24 12:38:53,941 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 277 flow. Second operand 5 states and 47 transitions. [2024-10-24 12:38:53,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 411 flow [2024-10-24 12:38:53,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 375 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-24 12:38:53,946 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 315 flow [2024-10-24 12:38:53,947 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} [2024-10-24 12:38:53,947 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 26 predicate places. [2024-10-24 12:38:53,947 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 315 flow [2024-10-24 12:38:53,948 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) [2024-10-24 12:38:53,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:53,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:53,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:38:53,949 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:53,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:53,949 INFO L85 PathProgramCache]: Analyzing trace with hash -945806931, now seen corresponding path program 6 times [2024-10-24 12:38:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:53,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298650374] [2024-10-24 12:38:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:53,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:54,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:54,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298650374] [2024-10-24 12:38:54,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298650374] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:38:54,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:38:54,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:38:54,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027202124] [2024-10-24 12:38:54,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:38:54,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:38:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:38:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:38:54,205 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:54,205 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) [2024-10-24 12:38:54,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:54,323 INFO L124 PetriNetUnfolderBase]: 92/170 cut-off events. [2024-10-24 12:38:54,323 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-10-24 12:38:54,324 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. [2024-10-24 12:38:54,325 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 37 selfloop transitions, 17 changer transitions 0/55 dead transitions. [2024-10-24 12:38:54,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 484 flow [2024-10-24 12:38:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:38:54,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:38:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2024-10-24 12:38:54,327 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48 [2024-10-24 12:38:54,327 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 315 flow. Second operand 5 states and 48 transitions. [2024-10-24 12:38:54,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 484 flow [2024-10-24 12:38:54,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-24 12:38:54,331 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 347 flow [2024-10-24 12:38:54,332 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} [2024-10-24 12:38:54,332 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2024-10-24 12:38:54,333 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 347 flow [2024-10-24 12:38:54,333 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) [2024-10-24 12:38:54,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:54,333 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:54,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 12:38:54,334 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:54,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash -804331554, now seen corresponding path program 1 times [2024-10-24 12:38:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306385952] [2024-10-24 12:38:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:54,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:54,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306385952] [2024-10-24 12:38:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306385952] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124832619] [2024-10-24 12:38:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:54,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:54,525 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) [2024-10-24 12:38:54,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:38:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:54,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 12:38:54,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:54,694 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 [2024-10-24 12:38:55,038 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 [2024-10-24 12:38:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:55,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:38:55,954 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 [2024-10-24 12:38:55,971 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:38:55,971 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 [2024-10-24 12:38:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124832619] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:38:56,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:38:56,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-24 12:38:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091881901] [2024-10-24 12:38:56,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:38:56,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:38:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:38:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:38:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:38:56,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:38:56,012 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) [2024-10-24 12:38:56,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:38:56,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:38:56,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:38:58,247 INFO L124 PetriNetUnfolderBase]: 189/373 cut-off events. [2024-10-24 12:38:58,247 INFO L125 PetriNetUnfolderBase]: For 837/837 co-relation queries the response was YES. [2024-10-24 12:38:58,250 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. [2024-10-24 12:38:58,253 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 79 selfloop transitions, 45 changer transitions 3/128 dead transitions. [2024-10-24 12:38:58,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 128 transitions, 1031 flow [2024-10-24 12:38:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 12:38:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-24 12:38:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-10-24 12:38:58,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-10-24 12:38:58,260 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 347 flow. Second operand 19 states and 169 transitions. [2024-10-24 12:38:58,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 128 transitions, 1031 flow [2024-10-24 12:38:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 128 transitions, 975 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-24 12:38:58,270 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 652 flow [2024-10-24 12:38:58,270 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} [2024-10-24 12:38:58,273 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 53 predicate places. [2024-10-24 12:38:58,274 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 652 flow [2024-10-24 12:38:58,274 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) [2024-10-24 12:38:58,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:38:58,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:38:58,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:38:58,475 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 [2024-10-24 12:38:58,476 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:38:58,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:38:58,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1333235710, now seen corresponding path program 2 times [2024-10-24 12:38:58,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:38:58,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109688540] [2024-10-24 12:38:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:38:58,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:38:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:38:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:38:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:38:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109688540] [2024-10-24 12:38:58,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109688540] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:38:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598422169] [2024-10-24 12:38:58,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:38:58,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:38:58,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:38:58,695 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) [2024-10-24 12:38:58,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:38:58,783 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:38:58,783 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:38:58,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 12:38:58,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:38:58,815 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 [2024-10-24 12:38:59,097 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 [2024-10-24 12:38:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:38:59,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:00,011 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 [2024-10-24 12:39:00,021 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:00,022 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 [2024-10-24 12:39:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598422169] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:00,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:00,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-24 12:39:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421818593] [2024-10-24 12:39:00,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:00,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:39:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:39:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:39:00,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:00,063 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) [2024-10-24 12:39:00,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:00,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:00,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:01,873 INFO L124 PetriNetUnfolderBase]: 221/456 cut-off events. [2024-10-24 12:39:01,873 INFO L125 PetriNetUnfolderBase]: For 1850/1850 co-relation queries the response was YES. [2024-10-24 12:39:01,876 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. [2024-10-24 12:39:01,879 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 86 selfloop transitions, 57 changer transitions 10/154 dead transitions. [2024-10-24 12:39:01,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 154 transitions, 1447 flow [2024-10-24 12:39:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 12:39:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 12:39:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 194 transitions. [2024-10-24 12:39:01,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-10-24 12:39:01,881 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 652 flow. Second operand 22 states and 194 transitions. [2024-10-24 12:39:01,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 154 transitions, 1447 flow [2024-10-24 12:39:01,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 154 transitions, 1273 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-10-24 12:39:01,893 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 816 flow [2024-10-24 12:39:01,893 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} [2024-10-24 12:39:01,894 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 75 predicate places. [2024-10-24 12:39:01,894 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 816 flow [2024-10-24 12:39:01,894 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) [2024-10-24 12:39:01,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:01,895 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:01,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:39:02,098 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 [2024-10-24 12:39:02,099 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:02,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:02,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1411883950, now seen corresponding path program 3 times [2024-10-24 12:39:02,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:02,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87437745] [2024-10-24 12:39:02,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:02,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:02,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:02,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87437745] [2024-10-24 12:39:02,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87437745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:02,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843194673] [2024-10-24 12:39:02,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:39:02,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:02,284 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) [2024-10-24 12:39:02,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:39:02,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:39:02,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:02,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 12:39:02,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:02,390 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 [2024-10-24 12:39:02,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:39:02,627 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 [2024-10-24 12:39:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:02,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:03,490 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 [2024-10-24 12:39:03,498 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:03,499 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 [2024-10-24 12:39:03,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843194673] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:03,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-24 12:39:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116122974] [2024-10-24 12:39:03,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:03,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:39:03,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:03,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:39:03,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:39:03,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:03,536 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) [2024-10-24 12:39:03,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:03,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:03,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:04,753 INFO L124 PetriNetUnfolderBase]: 216/441 cut-off events. [2024-10-24 12:39:04,754 INFO L125 PetriNetUnfolderBase]: For 2338/2338 co-relation queries the response was YES. [2024-10-24 12:39:04,757 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. [2024-10-24 12:39:04,760 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 74 selfloop transitions, 52 changer transitions 6/133 dead transitions. [2024-10-24 12:39:04,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1306 flow [2024-10-24 12:39:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 12:39:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 12:39:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-10-24 12:39:04,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2024-10-24 12:39:04,762 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 816 flow. Second operand 17 states and 151 transitions. [2024-10-24 12:39:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1306 flow [2024-10-24 12:39:04,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 133 transitions, 1218 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-10-24 12:39:04,776 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 831 flow [2024-10-24 12:39:04,777 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} [2024-10-24 12:39:04,777 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2024-10-24 12:39:04,777 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 831 flow [2024-10-24 12:39:04,778 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) [2024-10-24 12:39:04,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:04,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:04,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:39:04,978 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 [2024-10-24 12:39:04,979 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:04,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash -995429169, now seen corresponding path program 1 times [2024-10-24 12:39:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331253322] [2024-10-24 12:39:04,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:04,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:05,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331253322] [2024-10-24 12:39:05,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331253322] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:05,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074062461] [2024-10-24 12:39:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:05,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:05,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:05,118 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) [2024-10-24 12:39:05,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 12:39:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:05,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-24 12:39:05,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:05,236 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 [2024-10-24 12:39:05,555 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-10-24 12:39:05,556 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 [2024-10-24 12:39:05,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:05,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:07,298 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 [2024-10-24 12:39:07,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:39:07,493 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 [2024-10-24 12:39:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:30,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074062461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:30,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:30,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-10-24 12:39:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801427794] [2024-10-24 12:39:30,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:30,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:39:30,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:39:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:39:30,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:30,109 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) [2024-10-24 12:39:30,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:30,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:30,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:31,601 INFO L124 PetriNetUnfolderBase]: 461/899 cut-off events. [2024-10-24 12:39:31,601 INFO L125 PetriNetUnfolderBase]: For 5571/5571 co-relation queries the response was YES. [2024-10-24 12:39:31,606 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. [2024-10-24 12:39:31,611 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 118 selfloop transitions, 91 changer transitions 31/241 dead transitions. [2024-10-24 12:39:31,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 241 transitions, 2508 flow [2024-10-24 12:39:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-24 12:39:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-24 12:39:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-10-24 12:39:31,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-24 12:39:31,615 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 831 flow. Second operand 28 states and 231 transitions. [2024-10-24 12:39:31,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 241 transitions, 2508 flow [2024-10-24 12:39:31,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 2288 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-10-24 12:39:31,636 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 1554 flow [2024-10-24 12:39:31,637 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} [2024-10-24 12:39:31,637 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 106 predicate places. [2024-10-24 12:39:31,638 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 1554 flow [2024-10-24 12:39:31,638 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) [2024-10-24 12:39:31,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:31,638 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:31,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 12:39:31,842 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 [2024-10-24 12:39:31,843 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:31,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:31,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1251118278, now seen corresponding path program 4 times [2024-10-24 12:39:31,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:31,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574236914] [2024-10-24 12:39:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:32,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574236914] [2024-10-24 12:39:32,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574236914] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262266676] [2024-10-24 12:39:32,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:39:32,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:32,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:32,038 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) [2024-10-24 12:39:32,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 12:39:32,128 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:39:32,128 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:32,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 12:39:32,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:32,289 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 [2024-10-24 12:39:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:32,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:32,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:39:32,802 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 [2024-10-24 12:39:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:33,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262266676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:33,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:33,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-10-24 12:39:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462248895] [2024-10-24 12:39:33,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:33,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 12:39:33,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 12:39:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-10-24 12:39:33,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:33,175 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) [2024-10-24 12:39:33,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:33,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:33,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:33,948 INFO L124 PetriNetUnfolderBase]: 477/918 cut-off events. [2024-10-24 12:39:33,949 INFO L125 PetriNetUnfolderBase]: For 8382/8382 co-relation queries the response was YES. [2024-10-24 12:39:33,954 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. [2024-10-24 12:39:33,960 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 120 selfloop transitions, 60 changer transitions 3/184 dead transitions. [2024-10-24 12:39:33,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 2260 flow [2024-10-24 12:39:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 12:39:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-24 12:39:33,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2024-10-24 12:39:33,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-10-24 12:39:33,962 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 1554 flow. Second operand 13 states and 113 transitions. [2024-10-24 12:39:33,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 2260 flow [2024-10-24 12:39:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 2094 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-10-24 12:39:33,998 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1770 flow [2024-10-24 12:39:33,999 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} [2024-10-24 12:39:33,999 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 110 predicate places. [2024-10-24 12:39:33,999 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1770 flow [2024-10-24 12:39:34,000 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) [2024-10-24 12:39:34,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:34,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:34,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 12:39:34,201 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 [2024-10-24 12:39:34,201 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:34,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:34,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1172470038, now seen corresponding path program 5 times [2024-10-24 12:39:34,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:34,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36402648] [2024-10-24 12:39:34,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:34,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:34,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:34,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36402648] [2024-10-24 12:39:34,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36402648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:34,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731083470] [2024-10-24 12:39:34,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-24 12:39:34,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:34,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:34,341 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) [2024-10-24 12:39:34,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 12:39:34,420 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:34,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:34,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-24 12:39:34,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:34,590 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 [2024-10-24 12:39:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:34,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:34,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:39:34,917 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 [2024-10-24 12:39:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:35,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731083470] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:35,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-24 12:39:35,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128278377] [2024-10-24 12:39:35,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:35,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:39:35,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:39:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:39:35,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:35,899 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) [2024-10-24 12:39:35,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:35,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:37,988 INFO L124 PetriNetUnfolderBase]: 619/1243 cut-off events. [2024-10-24 12:39:37,988 INFO L125 PetriNetUnfolderBase]: For 11905/11905 co-relation queries the response was YES. [2024-10-24 12:39:37,994 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. [2024-10-24 12:39:38,002 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 166 selfloop transitions, 91 changer transitions 14/272 dead transitions. [2024-10-24 12:39:38,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 272 transitions, 3269 flow [2024-10-24 12:39:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-24 12:39:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-24 12:39:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 221 transitions. [2024-10-24 12:39:38,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-10-24 12:39:38,004 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1770 flow. Second operand 26 states and 221 transitions. [2024-10-24 12:39:38,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 272 transitions, 3269 flow [2024-10-24 12:39:38,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 272 transitions, 3213 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-24 12:39:38,037 INFO L231 Difference]: Finished difference. Result has 156 places, 182 transitions, 2314 flow [2024-10-24 12:39:38,037 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} [2024-10-24 12:39:38,038 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2024-10-24 12:39:38,038 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 182 transitions, 2314 flow [2024-10-24 12:39:38,038 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) [2024-10-24 12:39:38,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:38,038 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:38,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 12:39:38,241 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 [2024-10-24 12:39:38,242 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:38,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:38,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2031939214, now seen corresponding path program 6 times [2024-10-24 12:39:38,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:38,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705854774] [2024-10-24 12:39:38,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:38,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:38,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705854774] [2024-10-24 12:39:38,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705854774] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782823854] [2024-10-24 12:39:38,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-24 12:39:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:38,399 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) [2024-10-24 12:39:38,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 12:39:38,571 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-24 12:39:38,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:38,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 12:39:38,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:38,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782823854] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:38,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-24 12:39:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034380000] [2024-10-24 12:39:38,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:38,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 12:39:38,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 12:39:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-24 12:39:38,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:38,683 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) [2024-10-24 12:39:38,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:38,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:38,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:39,081 INFO L124 PetriNetUnfolderBase]: 638/1287 cut-off events. [2024-10-24 12:39:39,081 INFO L125 PetriNetUnfolderBase]: For 13934/13934 co-relation queries the response was YES. [2024-10-24 12:39:39,087 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. [2024-10-24 12:39:39,094 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 166 selfloop transitions, 53 changer transitions 0/220 dead transitions. [2024-10-24 12:39:39,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 220 transitions, 2981 flow [2024-10-24 12:39:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 12:39:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 12:39:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-10-24 12:39:39,097 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-10-24 12:39:39,097 INFO L175 Difference]: Start difference. First operand has 156 places, 182 transitions, 2314 flow. Second operand 12 states and 100 transitions. [2024-10-24 12:39:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 220 transitions, 2981 flow [2024-10-24 12:39:39,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2874 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-10-24 12:39:39,146 INFO L231 Difference]: Finished difference. Result has 160 places, 196 transitions, 2482 flow [2024-10-24 12:39:39,147 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} [2024-10-24 12:39:39,147 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 139 predicate places. [2024-10-24 12:39:39,147 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 196 transitions, 2482 flow [2024-10-24 12:39:39,148 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) [2024-10-24 12:39:39,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:39,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:39,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 12:39:39,352 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 [2024-10-24 12:39:39,353 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:39,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:39,353 INFO L85 PathProgramCache]: Analyzing trace with hash 982989216, now seen corresponding path program 7 times [2024-10-24 12:39:39,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14851881] [2024-10-24 12:39:39,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:39,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:39,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:39,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14851881] [2024-10-24 12:39:39,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14851881] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:39,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048864403] [2024-10-24 12:39:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-24 12:39:39,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:39,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:39,495 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) [2024-10-24 12:39:39,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 12:39:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:39,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-24 12:39:39,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:39,598 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 [2024-10-24 12:39:39,789 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 [2024-10-24 12:39:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:39,800 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:48,751 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 [2024-10-24 12:39:48,760 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:48,761 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 [2024-10-24 12:39:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:48,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048864403] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:48,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:48,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-24 12:39:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953776402] [2024-10-24 12:39:48,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:48,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 12:39:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:48,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 12:39:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-10-24 12:39:48,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:48,796 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) [2024-10-24 12:39:48,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:48,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:48,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:39:57,049 INFO L124 PetriNetUnfolderBase]: 640/1313 cut-off events. [2024-10-24 12:39:57,049 INFO L125 PetriNetUnfolderBase]: For 14986/14986 co-relation queries the response was YES. [2024-10-24 12:39:57,057 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. [2024-10-24 12:39:57,065 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 130 selfloop transitions, 105 changer transitions 6/242 dead transitions. [2024-10-24 12:39:57,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 242 transitions, 3360 flow [2024-10-24 12:39:57,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-24 12:39:57,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-24 12:39:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-10-24 12:39:57,067 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-10-24 12:39:57,067 INFO L175 Difference]: Start difference. First operand has 160 places, 196 transitions, 2482 flow. Second operand 19 states and 149 transitions. [2024-10-24 12:39:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 242 transitions, 3360 flow [2024-10-24 12:39:57,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 242 transitions, 3267 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-10-24 12:39:57,120 INFO L231 Difference]: Finished difference. Result has 178 places, 202 transitions, 2769 flow [2024-10-24 12:39:57,121 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} [2024-10-24 12:39:57,122 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2024-10-24 12:39:57,123 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 202 transitions, 2769 flow [2024-10-24 12:39:57,123 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) [2024-10-24 12:39:57,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:39:57,123 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:39:57,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-24 12:39:57,327 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 [2024-10-24 12:39:57,328 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:39:57,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:39:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1061637456, now seen corresponding path program 8 times [2024-10-24 12:39:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:39:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157322117] [2024-10-24 12:39:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:39:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:39:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:39:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:39:57,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:39:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157322117] [2024-10-24 12:39:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157322117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:39:57,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280938466] [2024-10-24 12:39:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:39:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:39:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:39:57,511 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) [2024-10-24 12:39:57,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-24 12:39:57,595 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:39:57,596 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:39:57,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 12:39:57,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:39:57,629 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 [2024-10-24 12:39:57,835 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:57,836 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 [2024-10-24 12:39:57,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:57,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:39:58,745 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 [2024-10-24 12:39:58,755 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 12:39:58,756 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 [2024-10-24 12:39:58,771 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 [2024-10-24 12:39:58,807 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-24 12:39:58,807 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 [2024-10-24 12:39:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:39:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280938466] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:39:59,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:39:59,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-24 12:39:59,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92415003] [2024-10-24 12:39:59,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:39:59,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 12:39:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:39:59,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 12:39:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-24 12:39:59,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:39:59,332 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) [2024-10-24 12:39:59,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:39:59,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:39:59,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:40:02,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 12:40:03,394 INFO L124 PetriNetUnfolderBase]: 769/1569 cut-off events. [2024-10-24 12:40:03,395 INFO L125 PetriNetUnfolderBase]: For 23575/23575 co-relation queries the response was YES. [2024-10-24 12:40:03,404 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. [2024-10-24 12:40:03,414 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 141 selfloop transitions, 140 changer transitions 18/300 dead transitions. [2024-10-24 12:40:03,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 300 transitions, 4468 flow [2024-10-24 12:40:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 12:40:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 12:40:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 204 transitions. [2024-10-24 12:40:03,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4434782608695652 [2024-10-24 12:40:03,419 INFO L175 Difference]: Start difference. First operand has 178 places, 202 transitions, 2769 flow. Second operand 23 states and 204 transitions. [2024-10-24 12:40:03,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 300 transitions, 4468 flow [2024-10-24 12:40:03,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 300 transitions, 4062 flow, removed 128 selfloop flow, removed 12 redundant places. [2024-10-24 12:40:03,505 INFO L231 Difference]: Finished difference. Result has 189 places, 232 transitions, 3378 flow [2024-10-24 12:40:03,505 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} [2024-10-24 12:40:03,506 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 168 predicate places. [2024-10-24 12:40:03,506 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 232 transitions, 3378 flow [2024-10-24 12:40:03,507 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) [2024-10-24 12:40:03,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:40:03,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:40:03,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-24 12:40:03,711 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 [2024-10-24 12:40:03,712 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:40:03,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:40:03,712 INFO L85 PathProgramCache]: Analyzing trace with hash 183734254, now seen corresponding path program 9 times [2024-10-24 12:40:03,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:40:03,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44837554] [2024-10-24 12:40:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:40:03,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:40:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:40:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:03,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:40:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44837554] [2024-10-24 12:40:03,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44837554] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:40:03,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253593082] [2024-10-24 12:40:03,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:40:03,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:40:03,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:40:03,851 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) [2024-10-24 12:40:03,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-24 12:40:03,941 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:40:03,941 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:40:03,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-24 12:40:03,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:40:04,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:40:04,149 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 [2024-10-24 12:40:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:04,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:40:04,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:40:04,325 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 [2024-10-24 12:40:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:04,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253593082] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:40:04,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:40:04,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-10-24 12:40:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608230074] [2024-10-24 12:40:04,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:40:04,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-24 12:40:04,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:40:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-24 12:40:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-24 12:40:04,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-24 12:40:04,553 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) [2024-10-24 12:40:04,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:40:04,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-24 12:40:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:40:05,387 INFO L124 PetriNetUnfolderBase]: 885/1848 cut-off events. [2024-10-24 12:40:05,388 INFO L125 PetriNetUnfolderBase]: For 29512/29512 co-relation queries the response was YES. [2024-10-24 12:40:05,396 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. [2024-10-24 12:40:05,406 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 169 selfloop transitions, 151 changer transitions 5/326 dead transitions. [2024-10-24 12:40:05,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 326 transitions, 5180 flow [2024-10-24 12:40:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 12:40:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 12:40:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 140 transitions. [2024-10-24 12:40:05,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-10-24 12:40:05,408 INFO L175 Difference]: Start difference. First operand has 189 places, 232 transitions, 3378 flow. Second operand 17 states and 140 transitions. [2024-10-24 12:40:05,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 326 transitions, 5180 flow [2024-10-24 12:40:05,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 326 transitions, 5042 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-10-24 12:40:05,484 INFO L231 Difference]: Finished difference. Result has 206 places, 266 transitions, 4277 flow [2024-10-24 12:40:05,484 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} [2024-10-24 12:40:05,485 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2024-10-24 12:40:05,485 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 266 transitions, 4277 flow [2024-10-24 12:40:05,485 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) [2024-10-24 12:40:05,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:40:05,486 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:40:05,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-24 12:40:05,686 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 [2024-10-24 12:40:05,686 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-24 12:40:05,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:40:05,687 INFO L85 PathProgramCache]: Analyzing trace with hash 202168280, now seen corresponding path program 10 times [2024-10-24 12:40:05,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:40:05,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250901542] [2024-10-24 12:40:05,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:40:05,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:40:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:40:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:40:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250901542] [2024-10-24 12:40:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250901542] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:40:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684252729] [2024-10-24 12:40:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-24 12:40:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:40:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:40:05,856 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) [2024-10-24 12:40:05,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-24 12:40:05,934 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-24 12:40:05,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:40:05,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 12:40:05,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:40:06,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 12:40:06,207 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 [2024-10-24 12:40:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:40:06,290 INFO L311 TraceCheckSpWp]: Computing backward predicates...