./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/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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/popl20-more-queue-add-2-nl.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 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:43:01,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:43:01,142 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:43:01,147 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:43:01,148 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:43:01,176 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:43:01,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:43:01,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:43:01,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:43:01,178 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:43:01,180 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:43:01,180 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:43:01,181 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:43:01,182 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:43:01,183 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:43:01,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:43:01,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:43:01,184 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:43:01,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:43:01,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:43:01,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:43:01,189 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:43:01,189 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:43:01,190 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:43:01,190 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:43:01,190 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:43:01,190 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:43:01,191 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:43:01,191 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:43:01,191 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:43:01,191 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:43:01,191 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:43:01,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:01,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:43:01,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:43:01,192 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:43:01,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:43:01,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:43:01,193 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:43:01,194 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:43:01,194 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:43:01,198 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:43:01,198 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-11-20 09:43:01,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:43:01,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:43:01,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:43:01,500 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:43:01,500 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:43:01,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-20 09:43:02,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:43:03,189 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:43:03,190 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-11-20 09:43:03,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b80e7f3dd/d054c74ba0144794b7bae7c109088ff2/FLAG93ff4aa93 [2024-11-20 09:43:03,577 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b80e7f3dd/d054c74ba0144794b7bae7c109088ff2 [2024-11-20 09:43:03,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:43:03,581 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:43:03,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:03,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:43:03,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:43:03,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aef8689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03, skipping insertion in model container [2024-11-20 09:43:03,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,615 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:43:03,799 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-11-20 09:43:03,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:03,816 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:43:03,838 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-11-20 09:43:03,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:03,856 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:43:03,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03 WrapperNode [2024-11-20 09:43:03,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:03,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:03,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:43:03,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:43:03,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,891 INFO L138 Inliner]: procedures = 24, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 159 [2024-11-20 09:43:03,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:03,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:43:03,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:43:03,893 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:43:03,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,906 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,919 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 09:43:03,919 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,920 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,928 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,930 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,931 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:43:03,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:43:03,934 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:43:03,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:43:03,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (1/1) ... [2024-11-20 09:43:03,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:03,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:03,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 09:43:03,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 09:43:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:43:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:43:04,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:43:04,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:43:04,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:43:04,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:43:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:43:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:43:04,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:43:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:43:04,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:43:04,010 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:43:04,103 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:43:04,106 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:43:04,419 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:43:04,420 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:43:04,671 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:43:04,671 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 09:43:04,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:04 BoogieIcfgContainer [2024-11-20 09:43:04,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:43:04,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:43:04,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:43:04,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:43:04,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:43:03" (1/3) ... [2024-11-20 09:43:04,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6d5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:04, skipping insertion in model container [2024-11-20 09:43:04,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:03" (2/3) ... [2024-11-20 09:43:04,682 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b6d5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:04, skipping insertion in model container [2024-11-20 09:43:04,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:04" (3/3) ... [2024-11-20 09:43:04,684 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-11-20 09:43:04,700 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:43:04,700 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:43:04,700 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:43:04,777 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:43:04,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 72 flow [2024-11-20 09:43:04,894 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-20 09:43:04,895 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:43:04,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 4/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-11-20 09:43:04,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 72 flow [2024-11-20 09:43:04,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 64 flow [2024-11-20 09:43:04,909 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:43:04,918 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;@24438eb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:43:04,918 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:43:04,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:43:04,926 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-20 09:43:04,926 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:43:04,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:04,927 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:04,928 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:04,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2097850719, now seen corresponding path program 1 times [2024-11-20 09:43:04,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:04,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827565324] [2024-11-20 09:43:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:04,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827565324] [2024-11-20 09:43:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827565324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:05,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:43:05,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275829130] [2024-11-20 09:43:05,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:05,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-20 09:43:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-20 09:43:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-20 09:43:05,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-20 09:43:05,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:05,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-20 09:43:05,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:05,289 INFO L124 PetriNetUnfolderBase]: 108/208 cut-off events. [2024-11-20 09:43:05,290 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-20 09:43:05,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 208 events. 108/208 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 678 event pairs, 83 based on Foata normal form. 13/202 useless extension candidates. Maximal degree in co-relation 366. Up to 178 conditions per place. [2024-11-20 09:43:05,295 INFO L140 encePairwiseOnDemand]: 28/29 looper letters, 20 selfloop transitions, 0 changer transitions 0/25 dead transitions. [2024-11-20 09:43:05,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 102 flow [2024-11-20 09:43:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-20 09:43:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-20 09:43:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2024-11-20 09:43:05,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2024-11-20 09:43:05,311 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2024-11-20 09:43:05,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 102 flow [2024-11-20 09:43:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:05,316 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 54 flow [2024-11-20 09:43:05,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2024-11-20 09:43:05,322 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-11-20 09:43:05,323 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 54 flow [2024-11-20 09:43:05,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:05,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:05,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:43:05,324 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:05,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:05,325 INFO L85 PathProgramCache]: Analyzing trace with hash 702721458, now seen corresponding path program 1 times [2024-11-20 09:43:05,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:05,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627775119] [2024-11-20 09:43:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:05,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627775119] [2024-11-20 09:43:05,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627775119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:05,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:05,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:43:05,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624902815] [2024-11-20 09:43:05,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:05,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:43:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:05,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:43:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:43:05,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-20 09:43:05,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:05,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-20 09:43:05,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:05,636 INFO L124 PetriNetUnfolderBase]: 116/226 cut-off events. [2024-11-20 09:43:05,637 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:43:05,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 226 events. 116/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 702 event pairs, 34 based on Foata normal form. 3/216 useless extension candidates. Maximal degree in co-relation 427. Up to 159 conditions per place. [2024-11-20 09:43:05,641 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-20 09:43:05,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 123 flow [2024-11-20 09:43:05,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:43:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:43:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-20 09:43:05,644 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5632183908045977 [2024-11-20 09:43:05,644 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 54 flow. Second operand 3 states and 49 transitions. [2024-11-20 09:43:05,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 123 flow [2024-11-20 09:43:05,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 32 transitions, 123 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:43:05,648 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 73 flow [2024-11-20 09:43:05,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2024-11-20 09:43:05,649 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2024-11-20 09:43:05,649 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 73 flow [2024-11-20 09:43:05,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:05,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:05,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:43:05,651 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:05,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1414017828, now seen corresponding path program 2 times [2024-11-20 09:43:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089851339] [2024-11-20 09:43:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:05,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:05,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089851339] [2024-11-20 09:43:05,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089851339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:43:05,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365321387] [2024-11-20 09:43:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:05,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:43:05,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:43:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:43:05,837 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-20 09:43:05,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:05,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-20 09:43:05,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:05,940 INFO L124 PetriNetUnfolderBase]: 129/267 cut-off events. [2024-11-20 09:43:05,940 INFO L125 PetriNetUnfolderBase]: For 47/49 co-relation queries the response was YES. [2024-11-20 09:43:05,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 267 events. 129/267 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 934 event pairs, 93 based on Foata normal form. 11/264 useless extension candidates. Maximal degree in co-relation 565. Up to 193 conditions per place. [2024-11-20 09:43:05,943 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 21 selfloop transitions, 2 changer transitions 8/36 dead transitions. [2024-11-20 09:43:05,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 155 flow [2024-11-20 09:43:05,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:43:05,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:43:05,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-20 09:43:05,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-11-20 09:43:05,945 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 73 flow. Second operand 4 states and 59 transitions. [2024-11-20 09:43:05,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 155 flow [2024-11-20 09:43:05,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:43:05,947 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 86 flow [2024-11-20 09:43:05,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-20 09:43:05,948 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-11-20 09:43:05,948 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 86 flow [2024-11-20 09:43:05,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:05,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:05,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:05,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:43:05,949 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:05,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 453692084, now seen corresponding path program 1 times [2024-11-20 09:43:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:05,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282692046] [2024-11-20 09:43:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:05,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:06,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:06,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282692046] [2024-11-20 09:43:06,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282692046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:06,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:06,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145256248] [2024-11-20 09:43:06,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:06,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:06,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:06,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:06,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:06,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:06,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:06,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:06,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:06,884 INFO L124 PetriNetUnfolderBase]: 171/334 cut-off events. [2024-11-20 09:43:06,884 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-20 09:43:06,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 334 events. 171/334 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1255 event pairs, 10 based on Foata normal form. 1/334 useless extension candidates. Maximal degree in co-relation 727. Up to 199 conditions per place. [2024-11-20 09:43:06,890 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 42 selfloop transitions, 13 changer transitions 5/64 dead transitions. [2024-11-20 09:43:06,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 64 transitions, 299 flow [2024-11-20 09:43:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:06,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-11-20 09:43:06,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-20 09:43:06,897 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 86 flow. Second operand 10 states and 120 transitions. [2024-11-20 09:43:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 64 transitions, 299 flow [2024-11-20 09:43:06,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 64 transitions, 289 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 09:43:06,900 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 152 flow [2024-11-20 09:43:06,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=152, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-20 09:43:06,901 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2024-11-20 09:43:06,901 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 152 flow [2024-11-20 09:43:06,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:06,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:06,901 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:06,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:43:06,902 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:06,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash -563805100, now seen corresponding path program 2 times [2024-11-20 09:43:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:06,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95598641] [2024-11-20 09:43:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:07,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:07,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95598641] [2024-11-20 09:43:07,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95598641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:07,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:07,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635202795] [2024-11-20 09:43:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:07,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:07,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:07,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:07,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 152 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:07,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:07,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:07,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:07,626 INFO L124 PetriNetUnfolderBase]: 193/388 cut-off events. [2024-11-20 09:43:07,627 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2024-11-20 09:43:07,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1061 conditions, 388 events. 193/388 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1629 event pairs, 24 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 1051. Up to 226 conditions per place. [2024-11-20 09:43:07,631 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 44 selfloop transitions, 20 changer transitions 5/73 dead transitions. [2024-11-20 09:43:07,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 428 flow [2024-11-20 09:43:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-11-20 09:43:07,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4241379310344828 [2024-11-20 09:43:07,634 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 152 flow. Second operand 10 states and 123 transitions. [2024-11-20 09:43:07,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 428 flow [2024-11-20 09:43:07,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 419 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:07,639 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 274 flow [2024-11-20 09:43:07,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=274, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-11-20 09:43:07,640 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2024-11-20 09:43:07,640 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 274 flow [2024-11-20 09:43:07,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:07,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:07,641 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:07,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:43:07,641 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:07,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 783150618, now seen corresponding path program 3 times [2024-11-20 09:43:07,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:07,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248139567] [2024-11-20 09:43:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248139567] [2024-11-20 09:43:08,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248139567] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:08,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169824989] [2024-11-20 09:43:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:08,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:08,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:08,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:08,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:08,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 274 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:08,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:08,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:08,313 INFO L124 PetriNetUnfolderBase]: 205/428 cut-off events. [2024-11-20 09:43:08,314 INFO L125 PetriNetUnfolderBase]: For 496/496 co-relation queries the response was YES. [2024-11-20 09:43:08,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 428 events. 205/428 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1932 event pairs, 9 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1349. Up to 213 conditions per place. [2024-11-20 09:43:08,317 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 26 changer transitions 5/83 dead transitions. [2024-11-20 09:43:08,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 569 flow [2024-11-20 09:43:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:43:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:43:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-11-20 09:43:08,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4169278996865204 [2024-11-20 09:43:08,319 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 274 flow. Second operand 11 states and 133 transitions. [2024-11-20 09:43:08,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 569 flow [2024-11-20 09:43:08,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 546 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:08,327 INFO L231 Difference]: Finished difference. Result has 63 places, 53 transitions, 349 flow [2024-11-20 09:43:08,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=349, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2024-11-20 09:43:08,329 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-11-20 09:43:08,329 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 349 flow [2024-11-20 09:43:08,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:08,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:08,330 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:08,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:43:08,331 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:08,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:08,331 INFO L85 PathProgramCache]: Analyzing trace with hash -496111328, now seen corresponding path program 4 times [2024-11-20 09:43:08,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:08,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879615149] [2024-11-20 09:43:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:08,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:08,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879615149] [2024-11-20 09:43:08,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879615149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:08,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:08,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011482369] [2024-11-20 09:43:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:08,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:08,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:08,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:08,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 349 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:08,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:08,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:08,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:08,985 INFO L124 PetriNetUnfolderBase]: 204/435 cut-off events. [2024-11-20 09:43:08,985 INFO L125 PetriNetUnfolderBase]: For 953/953 co-relation queries the response was YES. [2024-11-20 09:43:08,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 435 events. 204/435 cut-off events. For 953/953 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2017 event pairs, 32 based on Foata normal form. 1/436 useless extension candidates. Maximal degree in co-relation 1489. Up to 263 conditions per place. [2024-11-20 09:43:08,989 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 49 selfloop transitions, 22 changer transitions 5/80 dead transitions. [2024-11-20 09:43:08,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 80 transitions, 633 flow [2024-11-20 09:43:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:08,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-11-20 09:43:08,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2024-11-20 09:43:08,991 INFO L175 Difference]: Start difference. First operand has 63 places, 53 transitions, 349 flow. Second operand 10 states and 122 transitions. [2024-11-20 09:43:08,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 80 transitions, 633 flow [2024-11-20 09:43:08,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 572 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-11-20 09:43:08,996 INFO L231 Difference]: Finished difference. Result has 68 places, 56 transitions, 390 flow [2024-11-20 09:43:08,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=390, PETRI_PLACES=68, PETRI_TRANSITIONS=56} [2024-11-20 09:43:08,997 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 39 predicate places. [2024-11-20 09:43:08,998 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 56 transitions, 390 flow [2024-11-20 09:43:08,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:08,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:08,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:08,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:43:08,998 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:08,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1358592218, now seen corresponding path program 5 times [2024-11-20 09:43:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:08,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464242262] [2024-11-20 09:43:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:08,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:09,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:09,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464242262] [2024-11-20 09:43:09,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464242262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:09,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:09,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:09,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552312656] [2024-11-20 09:43:09,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:09,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:09,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:09,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:09,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:09,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:09,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 390 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:09,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:09,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:09,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:09,623 INFO L124 PetriNetUnfolderBase]: 216/469 cut-off events. [2024-11-20 09:43:09,623 INFO L125 PetriNetUnfolderBase]: For 972/972 co-relation queries the response was YES. [2024-11-20 09:43:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1643 conditions, 469 events. 216/469 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2240 event pairs, 22 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 1622. Up to 282 conditions per place. [2024-11-20 09:43:09,628 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 54 selfloop transitions, 23 changer transitions 5/86 dead transitions. [2024-11-20 09:43:09,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 86 transitions, 679 flow [2024-11-20 09:43:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-11-20 09:43:09,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42758620689655175 [2024-11-20 09:43:09,629 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 390 flow. Second operand 10 states and 124 transitions. [2024-11-20 09:43:09,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 86 transitions, 679 flow [2024-11-20 09:43:09,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 86 transitions, 636 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-20 09:43:09,634 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 434 flow [2024-11-20 09:43:09,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=434, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-20 09:43:09,635 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-11-20 09:43:09,635 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 434 flow [2024-11-20 09:43:09,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:09,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:09,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:09,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:43:09,636 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:09,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash 75713766, now seen corresponding path program 6 times [2024-11-20 09:43:09,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:09,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122039444] [2024-11-20 09:43:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:09,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:09,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:09,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122039444] [2024-11-20 09:43:09,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122039444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:09,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:09,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528398682] [2024-11-20 09:43:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:09,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:09,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:09,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 434 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:09,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:09,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:09,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:10,162 INFO L124 PetriNetUnfolderBase]: 212/456 cut-off events. [2024-11-20 09:43:10,163 INFO L125 PetriNetUnfolderBase]: For 1524/1532 co-relation queries the response was YES. [2024-11-20 09:43:10,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1717 conditions, 456 events. 212/456 cut-off events. For 1524/1532 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2153 event pairs, 22 based on Foata normal form. 9/465 useless extension candidates. Maximal degree in co-relation 1695. Up to 286 conditions per place. [2024-11-20 09:43:10,167 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 48 selfloop transitions, 22 changer transitions 8/82 dead transitions. [2024-11-20 09:43:10,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 693 flow [2024-11-20 09:43:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:10,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-11-20 09:43:10,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4103448275862069 [2024-11-20 09:43:10,169 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 434 flow. Second operand 10 states and 119 transitions. [2024-11-20 09:43:10,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 693 flow [2024-11-20 09:43:10,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 82 transitions, 636 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-20 09:43:10,177 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 430 flow [2024-11-20 09:43:10,177 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=430, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2024-11-20 09:43:10,178 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-11-20 09:43:10,179 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 430 flow [2024-11-20 09:43:10,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:10,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:10,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:10,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 09:43:10,180 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:10,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1376393114, now seen corresponding path program 7 times [2024-11-20 09:43:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:10,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430960828] [2024-11-20 09:43:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:10,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:10,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:10,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430960828] [2024-11-20 09:43:10,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430960828] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:10,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:10,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:10,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226066674] [2024-11-20 09:43:10,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:10,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:10,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:10,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:10,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:10,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:10,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 430 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:10,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:10,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:10,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:10,842 INFO L124 PetriNetUnfolderBase]: 221/483 cut-off events. [2024-11-20 09:43:10,843 INFO L125 PetriNetUnfolderBase]: For 1664/1676 co-relation queries the response was YES. [2024-11-20 09:43:10,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 483 events. 221/483 cut-off events. For 1664/1676 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2353 event pairs, 33 based on Foata normal form. 3/486 useless extension candidates. Maximal degree in co-relation 1792. Up to 292 conditions per place. [2024-11-20 09:43:10,846 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 57 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2024-11-20 09:43:10,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 768 flow [2024-11-20 09:43:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-11-20 09:43:10,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2024-11-20 09:43:10,848 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 430 flow. Second operand 10 states and 126 transitions. [2024-11-20 09:43:10,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 768 flow [2024-11-20 09:43:10,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 714 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:10,853 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 473 flow [2024-11-20 09:43:10,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=473, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2024-11-20 09:43:10,855 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 50 predicate places. [2024-11-20 09:43:10,855 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 473 flow [2024-11-20 09:43:10,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:10,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:10,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:10,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 09:43:10,856 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:10,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -553579926, now seen corresponding path program 8 times [2024-11-20 09:43:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126866966] [2024-11-20 09:43:10,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:10,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:11,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:11,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126866966] [2024-11-20 09:43:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126866966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:11,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:11,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:11,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69708789] [2024-11-20 09:43:11,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:11,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:11,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:11,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:11,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:11,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:11,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 473 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:11,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:11,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:11,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:11,358 INFO L124 PetriNetUnfolderBase]: 217/470 cut-off events. [2024-11-20 09:43:11,358 INFO L125 PetriNetUnfolderBase]: For 2286/2306 co-relation queries the response was YES. [2024-11-20 09:43:11,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1881 conditions, 470 events. 217/470 cut-off events. For 2286/2306 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2274 event pairs, 33 based on Foata normal form. 11/481 useless extension candidates. Maximal degree in co-relation 1856. Up to 296 conditions per place. [2024-11-20 09:43:11,362 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 51 selfloop transitions, 22 changer transitions 8/85 dead transitions. [2024-11-20 09:43:11,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 773 flow [2024-11-20 09:43:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:11,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-11-20 09:43:11,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41724137931034483 [2024-11-20 09:43:11,363 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 473 flow. Second operand 10 states and 121 transitions. [2024-11-20 09:43:11,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 773 flow [2024-11-20 09:43:11,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 85 transitions, 706 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-20 09:43:11,370 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 461 flow [2024-11-20 09:43:11,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=461, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2024-11-20 09:43:11,371 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-11-20 09:43:11,371 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 461 flow [2024-11-20 09:43:11,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:11,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:11,372 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:11,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 09:43:11,372 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:11,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:11,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2131435174, now seen corresponding path program 9 times [2024-11-20 09:43:11,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:11,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880132117] [2024-11-20 09:43:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:11,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:11,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880132117] [2024-11-20 09:43:11,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880132117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:11,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:11,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006071664] [2024-11-20 09:43:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:11,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:11,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:11,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 461 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:11,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:11,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:11,964 INFO L124 PetriNetUnfolderBase]: 229/498 cut-off events. [2024-11-20 09:43:11,964 INFO L125 PetriNetUnfolderBase]: For 2520/2544 co-relation queries the response was YES. [2024-11-20 09:43:11,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1988 conditions, 498 events. 229/498 cut-off events. For 2520/2544 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2391 event pairs, 39 based on Foata normal form. 5/502 useless extension candidates. Maximal degree in co-relation 1962. Up to 302 conditions per place. [2024-11-20 09:43:11,969 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 60 selfloop transitions, 22 changer transitions 5/91 dead transitions. [2024-11-20 09:43:11,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 91 transitions, 822 flow [2024-11-20 09:43:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:11,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:11,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-11-20 09:43:11,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4379310344827586 [2024-11-20 09:43:11,970 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 461 flow. Second operand 10 states and 127 transitions. [2024-11-20 09:43:11,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 91 transitions, 822 flow [2024-11-20 09:43:11,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 766 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:11,977 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 510 flow [2024-11-20 09:43:11,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=510, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2024-11-20 09:43:11,978 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-11-20 09:43:11,978 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 510 flow [2024-11-20 09:43:11,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:11,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:11,979 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:11,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 09:43:11,979 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:11,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:11,980 INFO L85 PathProgramCache]: Analyzing trace with hash -264102008, now seen corresponding path program 10 times [2024-11-20 09:43:11,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:11,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948454755] [2024-11-20 09:43:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:12,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:12,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948454755] [2024-11-20 09:43:12,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948454755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:12,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:12,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:43:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057123381] [2024-11-20 09:43:12,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:12,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:43:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:43:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:12,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 29 [2024-11-20 09:43:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 510 flow. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 29 [2024-11-20 09:43:12,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:12,489 INFO L124 PetriNetUnfolderBase]: 225/485 cut-off events. [2024-11-20 09:43:12,489 INFO L125 PetriNetUnfolderBase]: For 3378/3416 co-relation queries the response was YES. [2024-11-20 09:43:12,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2042 conditions, 485 events. 225/485 cut-off events. For 3378/3416 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2318 event pairs, 39 based on Foata normal form. 13/497 useless extension candidates. Maximal degree in co-relation 2014. Up to 306 conditions per place. [2024-11-20 09:43:12,495 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 54 selfloop transitions, 21 changer transitions 8/87 dead transitions. [2024-11-20 09:43:12,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 87 transitions, 817 flow [2024-11-20 09:43:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:43:12,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:43:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-11-20 09:43:12,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4206896551724138 [2024-11-20 09:43:12,497 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 510 flow. Second operand 10 states and 122 transitions. [2024-11-20 09:43:12,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 87 transitions, 817 flow [2024-11-20 09:43:12,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 742 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-11-20 09:43:12,505 INFO L231 Difference]: Finished difference. Result has 87 places, 65 transitions, 490 flow [2024-11-20 09:43:12,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=490, PETRI_PLACES=87, PETRI_TRANSITIONS=65} [2024-11-20 09:43:12,506 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-11-20 09:43:12,507 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 65 transitions, 490 flow [2024-11-20 09:43:12,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:12,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:12,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:12,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 09:43:12,508 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:12,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1324135758, now seen corresponding path program 1 times [2024-11-20 09:43:12,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:12,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514399277] [2024-11-20 09:43:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:12,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514399277] [2024-11-20 09:43:12,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514399277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:12,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283096143] [2024-11-20 09:43:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:12,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:12,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:12,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:12,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:43:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:12,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:43:12,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:12,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:12,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283096143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:12,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:12,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-20 09:43:12,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245098672] [2024-11-20 09:43:12,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:12,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:43:12,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:12,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:43:12,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:43:12,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-20 09:43:12,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 65 transitions, 490 flow. Second operand has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:12,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:12,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-20 09:43:12,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:13,161 INFO L124 PetriNetUnfolderBase]: 359/848 cut-off events. [2024-11-20 09:43:13,162 INFO L125 PetriNetUnfolderBase]: For 6364/6414 co-relation queries the response was YES. [2024-11-20 09:43:13,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 848 events. 359/848 cut-off events. For 6364/6414 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5021 event pairs, 173 based on Foata normal form. 38/885 useless extension candidates. Maximal degree in co-relation 3532. Up to 369 conditions per place. [2024-11-20 09:43:13,171 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 106 selfloop transitions, 5 changer transitions 10/126 dead transitions. [2024-11-20 09:43:13,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 126 transitions, 1203 flow [2024-11-20 09:43:13,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:43:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:43:13,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-11-20 09:43:13,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114942528735632 [2024-11-20 09:43:13,173 INFO L175 Difference]: Start difference. First operand has 87 places, 65 transitions, 490 flow. Second operand 6 states and 89 transitions. [2024-11-20 09:43:13,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 126 transitions, 1203 flow [2024-11-20 09:43:13,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 1093 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:13,188 INFO L231 Difference]: Finished difference. Result has 85 places, 68 transitions, 479 flow [2024-11-20 09:43:13,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=479, PETRI_PLACES=85, PETRI_TRANSITIONS=68} [2024-11-20 09:43:13,189 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 56 predicate places. [2024-11-20 09:43:13,189 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 68 transitions, 479 flow [2024-11-20 09:43:13,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.666666666666666) internal successors, (128), 12 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:13,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:13,191 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:13,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:43:13,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 09:43:13,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:13,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:13,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1135903420, now seen corresponding path program 1 times [2024-11-20 09:43:13,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:13,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408532492] [2024-11-20 09:43:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:13,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408532492] [2024-11-20 09:43:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408532492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804251309] [2024-11-20 09:43:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:13,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:13,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:43:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:13,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:43:13,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:13,647 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:43:13,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804251309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:13,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:43:13,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-20 09:43:13,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726387051] [2024-11-20 09:43:13,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:13,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:43:13,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:13,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:43:13,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:43:13,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2024-11-20 09:43:13,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 68 transitions, 479 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:13,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:13,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2024-11-20 09:43:13,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:13,790 INFO L124 PetriNetUnfolderBase]: 341/856 cut-off events. [2024-11-20 09:43:13,791 INFO L125 PetriNetUnfolderBase]: For 6848/6985 co-relation queries the response was YES. [2024-11-20 09:43:13,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3456 conditions, 856 events. 341/856 cut-off events. For 6848/6985 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5160 event pairs, 98 based on Foata normal form. 81/936 useless extension candidates. Maximal degree in co-relation 3425. Up to 319 conditions per place. [2024-11-20 09:43:13,798 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 55 selfloop transitions, 7 changer transitions 26/93 dead transitions. [2024-11-20 09:43:13,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 805 flow [2024-11-20 09:43:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:43:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:43:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-11-20 09:43:13,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6724137931034483 [2024-11-20 09:43:13,799 INFO L175 Difference]: Start difference. First operand has 85 places, 68 transitions, 479 flow. Second operand 4 states and 78 transitions. [2024-11-20 09:43:13,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 805 flow [2024-11-20 09:43:13,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 93 transitions, 781 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:13,810 INFO L231 Difference]: Finished difference. Result has 86 places, 41 transitions, 296 flow [2024-11-20 09:43:13,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=86, PETRI_TRANSITIONS=41} [2024-11-20 09:43:13,810 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-11-20 09:43:13,811 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 41 transitions, 296 flow [2024-11-20 09:43:13,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:13,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:13,811 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:13,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:43:14,011 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,SelfDestructingSolverStorable14 [2024-11-20 09:43:14,012 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:14,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:14,012 INFO L85 PathProgramCache]: Analyzing trace with hash -512073594, now seen corresponding path program 2 times [2024-11-20 09:43:14,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:14,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126761242] [2024-11-20 09:43:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:14,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:14,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:14,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126761242] [2024-11-20 09:43:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126761242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440760883] [2024-11-20 09:43:14,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:43:14,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:14,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:14,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:14,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:43:14,537 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:14,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:14,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 09:43:14,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:14,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:14,869 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:43:14,869 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 25 treesize of output 12 [2024-11-20 09:43:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440760883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:15,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:15,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-20 09:43:15,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53969378] [2024-11-20 09:43:15,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:15,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 09:43:15,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:15,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 09:43:15,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-11-20 09:43:15,098 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-20 09:43:15,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 41 transitions, 296 flow. Second operand has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:15,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:15,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-20 09:43:15,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:16,312 INFO L124 PetriNetUnfolderBase]: 1077/2038 cut-off events. [2024-11-20 09:43:16,312 INFO L125 PetriNetUnfolderBase]: For 20782/20782 co-relation queries the response was YES. [2024-11-20 09:43:16,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8732 conditions, 2038 events. 1077/2038 cut-off events. For 20782/20782 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11051 event pairs, 81 based on Foata normal form. 89/2125 useless extension candidates. Maximal degree in co-relation 8701. Up to 472 conditions per place. [2024-11-20 09:43:16,331 INFO L140 encePairwiseOnDemand]: 21/29 looper letters, 192 selfloop transitions, 51 changer transitions 0/246 dead transitions. [2024-11-20 09:43:16,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 246 transitions, 2194 flow [2024-11-20 09:43:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 09:43:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-20 09:43:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 340 transitions. [2024-11-20 09:43:16,333 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2024-11-20 09:43:16,333 INFO L175 Difference]: Start difference. First operand has 86 places, 41 transitions, 296 flow. Second operand 24 states and 340 transitions. [2024-11-20 09:43:16,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 246 transitions, 2194 flow [2024-11-20 09:43:16,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 246 transitions, 1669 flow, removed 248 selfloop flow, removed 16 redundant places. [2024-11-20 09:43:16,348 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 794 flow [2024-11-20 09:43:16,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=794, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-11-20 09:43:16,349 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-11-20 09:43:16,349 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 794 flow [2024-11-20 09:43:16,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.590909090909091) internal successors, (167), 22 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:16,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:16,350 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:16,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:16,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:16,554 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:16,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1759470284, now seen corresponding path program 3 times [2024-11-20 09:43:16,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:16,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34980649] [2024-11-20 09:43:16,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:16,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:17,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:17,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34980649] [2024-11-20 09:43:17,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34980649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:17,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017008235] [2024-11-20 09:43:17,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:43:17,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:17,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:17,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:17,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:43:17,345 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:43:17,346 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:17,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:43:17,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:17,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 09:43:17,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:17,455 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 09:43:17,456 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 25 treesize of output 12 [2024-11-20 09:43:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 09:43:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017008235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:17,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:17,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2024-11-20 09:43:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094088325] [2024-11-20 09:43:17,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:17,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:43:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:43:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:43:17,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-20 09:43:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 794 flow. Second operand has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-20 09:43:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:18,170 INFO L124 PetriNetUnfolderBase]: 1821/3477 cut-off events. [2024-11-20 09:43:18,171 INFO L125 PetriNetUnfolderBase]: For 23529/23529 co-relation queries the response was YES. [2024-11-20 09:43:18,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14586 conditions, 3477 events. 1821/3477 cut-off events. For 23529/23529 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 21196 event pairs, 346 based on Foata normal form. 56/3531 useless extension candidates. Maximal degree in co-relation 14553. Up to 1190 conditions per place. [2024-11-20 09:43:18,211 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 154 selfloop transitions, 48 changer transitions 0/205 dead transitions. [2024-11-20 09:43:18,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 205 transitions, 2207 flow [2024-11-20 09:43:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:43:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:43:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 153 transitions. [2024-11-20 09:43:18,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40583554376657827 [2024-11-20 09:43:18,213 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 794 flow. Second operand 13 states and 153 transitions. [2024-11-20 09:43:18,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 205 transitions, 2207 flow [2024-11-20 09:43:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 205 transitions, 1971 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:18,282 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 991 flow [2024-11-20 09:43:18,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=991, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2024-11-20 09:43:18,283 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 72 predicate places. [2024-11-20 09:43:18,283 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 991 flow [2024-11-20 09:43:18,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.0) internal successors, (120), 15 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:18,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:18,283 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:18,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:18,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 09:43:18,488 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:18,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -728265300, now seen corresponding path program 1 times [2024-11-20 09:43:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:18,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396080413] [2024-11-20 09:43:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:19,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:19,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396080413] [2024-11-20 09:43:19,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396080413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:19,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321644293] [2024-11-20 09:43:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:19,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:19,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:19,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:43:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:19,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 09:43:19,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:20,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:21,203 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:21,204 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 42 treesize of output 34 [2024-11-20 09:43:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:21,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321644293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:21,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:21,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 49 [2024-11-20 09:43:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647820173] [2024-11-20 09:43:21,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:21,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-20 09:43:21,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:21,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-20 09:43:21,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2024-11-20 09:43:21,937 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:43:21,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 991 flow. Second operand has 50 states, 50 states have (on average 5.52) internal successors, (276), 50 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:21,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:21,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:43:21,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:25,912 INFO L124 PetriNetUnfolderBase]: 3326/6211 cut-off events. [2024-11-20 09:43:25,913 INFO L125 PetriNetUnfolderBase]: For 40602/40602 co-relation queries the response was YES. [2024-11-20 09:43:25,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26280 conditions, 6211 events. 3326/6211 cut-off events. For 40602/40602 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 42114 event pairs, 371 based on Foata normal form. 3/6214 useless extension candidates. Maximal degree in co-relation 26245. Up to 3484 conditions per place. [2024-11-20 09:43:25,964 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 212 selfloop transitions, 211 changer transitions 10/435 dead transitions. [2024-11-20 09:43:25,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 435 transitions, 4434 flow [2024-11-20 09:43:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-20 09:43:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-20 09:43:25,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-20 09:43:25,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29567131327953045 [2024-11-20 09:43:25,967 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 991 flow. Second operand 47 states and 403 transitions. [2024-11-20 09:43:25,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 435 transitions, 4434 flow [2024-11-20 09:43:26,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 435 transitions, 4406 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:26,065 INFO L231 Difference]: Finished difference. Result has 158 places, 307 transitions, 3702 flow [2024-11-20 09:43:26,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3702, PETRI_PLACES=158, PETRI_TRANSITIONS=307} [2024-11-20 09:43:26,065 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2024-11-20 09:43:26,065 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 307 transitions, 3702 flow [2024-11-20 09:43:26,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.52) internal successors, (276), 50 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:26,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:26,066 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:26,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:43:26,266 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,SelfDestructingSolverStorable17 [2024-11-20 09:43:26,267 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:26,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:26,267 INFO L85 PathProgramCache]: Analyzing trace with hash -287117274, now seen corresponding path program 2 times [2024-11-20 09:43:26,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:26,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840811033] [2024-11-20 09:43:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:26,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:27,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:27,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840811033] [2024-11-20 09:43:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840811033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:27,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239027749] [2024-11-20 09:43:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:43:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:27,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:27,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:43:27,626 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:27,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:27,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 09:43:27,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:28,353 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:28,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:28,922 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 42 treesize of output 34 [2024-11-20 09:43:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:29,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239027749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:29,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:29,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-20 09:43:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730515545] [2024-11-20 09:43:29,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:29,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-20 09:43:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-20 09:43:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 09:43:29,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:43:29,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 307 transitions, 3702 flow. Second operand has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:29,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:29,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:43:29,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:34,078 INFO L124 PetriNetUnfolderBase]: 3537/6647 cut-off events. [2024-11-20 09:43:34,078 INFO L125 PetriNetUnfolderBase]: For 62006/62006 co-relation queries the response was YES. [2024-11-20 09:43:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34671 conditions, 6647 events. 3537/6647 cut-off events. For 62006/62006 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 45947 event pairs, 431 based on Foata normal form. 3/6650 useless extension candidates. Maximal degree in co-relation 34621. Up to 3801 conditions per place. [2024-11-20 09:43:34,140 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 277 selfloop transitions, 254 changer transitions 10/543 dead transitions. [2024-11-20 09:43:34,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 543 transitions, 6704 flow [2024-11-20 09:43:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-20 09:43:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-20 09:43:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 411 transitions. [2024-11-20 09:43:34,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2952586206896552 [2024-11-20 09:43:34,143 INFO L175 Difference]: Start difference. First operand has 158 places, 307 transitions, 3702 flow. Second operand 48 states and 411 transitions. [2024-11-20 09:43:34,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 543 transitions, 6704 flow [2024-11-20 09:43:34,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 543 transitions, 6535 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-11-20 09:43:34,458 INFO L231 Difference]: Finished difference. Result has 211 places, 412 transitions, 5630 flow [2024-11-20 09:43:34,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5630, PETRI_PLACES=211, PETRI_TRANSITIONS=412} [2024-11-20 09:43:34,459 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 182 predicate places. [2024-11-20 09:43:34,459 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 412 transitions, 5630 flow [2024-11-20 09:43:34,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:34,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:34,459 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:34,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 09:43:34,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:34,660 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:34,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 105110766, now seen corresponding path program 3 times [2024-11-20 09:43:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:34,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858894557] [2024-11-20 09:43:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:34,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858894557] [2024-11-20 09:43:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858894557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851601153] [2024-11-20 09:43:35,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:43:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:35,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:35,639 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:43:35,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:43:35,862 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:35,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 09:43:35,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:36,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:37,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:37,251 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 40 treesize of output 32 [2024-11-20 09:43:37,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:37,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851601153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:37,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:37,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-20 09:43:37,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526940479] [2024-11-20 09:43:37,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:37,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-20 09:43:37,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:37,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-20 09:43:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2415, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 09:43:37,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:43:37,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 412 transitions, 5630 flow. Second operand has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:37,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:37,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:43:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:44,005 INFO L124 PetriNetUnfolderBase]: 3893/7372 cut-off events. [2024-11-20 09:43:44,005 INFO L125 PetriNetUnfolderBase]: For 95749/95749 co-relation queries the response was YES. [2024-11-20 09:43:44,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44906 conditions, 7372 events. 3893/7372 cut-off events. For 95749/95749 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 52377 event pairs, 302 based on Foata normal form. 5/7377 useless extension candidates. Maximal degree in co-relation 44844. Up to 3602 conditions per place. [2024-11-20 09:43:44,095 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 283 selfloop transitions, 435 changer transitions 27/747 dead transitions. [2024-11-20 09:43:44,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 747 transitions, 10342 flow [2024-11-20 09:43:44,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-20 09:43:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-20 09:43:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 524 transitions. [2024-11-20 09:43:44,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31699939503932245 [2024-11-20 09:43:44,099 INFO L175 Difference]: Start difference. First operand has 211 places, 412 transitions, 5630 flow. Second operand 57 states and 524 transitions. [2024-11-20 09:43:44,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 747 transitions, 10342 flow [2024-11-20 09:43:44,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 747 transitions, 10060 flow, removed 128 selfloop flow, removed 9 redundant places. [2024-11-20 09:43:44,604 INFO L231 Difference]: Finished difference. Result has 277 places, 550 transitions, 8833 flow [2024-11-20 09:43:44,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8833, PETRI_PLACES=277, PETRI_TRANSITIONS=550} [2024-11-20 09:43:44,605 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2024-11-20 09:43:44,605 INFO L471 AbstractCegarLoop]: Abstraction has has 277 places, 550 transitions, 8833 flow [2024-11-20 09:43:44,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:44,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:44,605 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:44,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 09:43:44,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:44,807 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:43:44,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:44,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1730166744, now seen corresponding path program 4 times [2024-11-20 09:43:44,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:44,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853541438] [2024-11-20 09:43:44,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:44,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:45,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853541438] [2024-11-20 09:43:45,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853541438] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582690651] [2024-11-20 09:43:45,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:43:45,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:45,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:43:45,926 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:43:45,926 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:45,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-20 09:43:45,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:46,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:47,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:47,170 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 40 treesize of output 32 [2024-11-20 09:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:47,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582690651] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:47,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:47,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2024-11-20 09:43:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142234658] [2024-11-20 09:43:47,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:47,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-20 09:43:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-20 09:43:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2024-11-20 09:43:47,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:43:47,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 550 transitions, 8833 flow. Second operand has 51 states, 51 states have (on average 5.529411764705882) internal successors, (282), 51 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:47,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:47,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:43:47,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:59,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 09:44:02,849 INFO L124 PetriNetUnfolderBase]: 4333/8254 cut-off events. [2024-11-20 09:44:02,849 INFO L125 PetriNetUnfolderBase]: For 148904/148904 co-relation queries the response was YES. [2024-11-20 09:44:02,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58320 conditions, 8254 events. 4333/8254 cut-off events. For 148904/148904 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 60564 event pairs, 311 based on Foata normal form. 3/8257 useless extension candidates. Maximal degree in co-relation 58239. Up to 3917 conditions per place. [2024-11-20 09:44:02,955 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 357 selfloop transitions, 642 changer transitions 10/1011 dead transitions. [2024-11-20 09:44:02,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1011 transitions, 16374 flow [2024-11-20 09:44:02,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-20 09:44:02,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2024-11-20 09:44:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 684 transitions. [2024-11-20 09:44:02,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3063143752798925 [2024-11-20 09:44:02,964 INFO L175 Difference]: Start difference. First operand has 277 places, 550 transitions, 8833 flow. Second operand 77 states and 684 transitions. [2024-11-20 09:44:02,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1011 transitions, 16374 flow [2024-11-20 09:44:03,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1011 transitions, 15739 flow, removed 288 selfloop flow, removed 12 redundant places. [2024-11-20 09:44:03,696 INFO L231 Difference]: Finished difference. Result has 356 places, 812 transitions, 14632 flow [2024-11-20 09:44:03,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=8391, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=14632, PETRI_PLACES=356, PETRI_TRANSITIONS=812} [2024-11-20 09:44:03,697 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 327 predicate places. [2024-11-20 09:44:03,697 INFO L471 AbstractCegarLoop]: Abstraction has has 356 places, 812 transitions, 14632 flow [2024-11-20 09:44:03,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.529411764705882) internal successors, (282), 51 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:03,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:03,698 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:03,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:03,898 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,SelfDestructingSolverStorable20 [2024-11-20 09:44:03,899 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:03,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1779634174, now seen corresponding path program 5 times [2024-11-20 09:44:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:03,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946656076] [2024-11-20 09:44:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:03,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:05,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:05,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946656076] [2024-11-20 09:44:05,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946656076] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:05,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472016193] [2024-11-20 09:44:05,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:44:05,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:05,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:05,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:44:05,119 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:05,119 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:05,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 09:44:05,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:06,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:06,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:06,805 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 40 treesize of output 32 [2024-11-20 09:44:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:07,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472016193] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:07,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:07,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-20 09:44:07,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317704547] [2024-11-20 09:44:07,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:07,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-20 09:44:07,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-20 09:44:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2384, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 09:44:07,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:44:07,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 812 transitions, 14632 flow. Second operand has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:07,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:07,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:44:07,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:13,935 INFO L124 PetriNetUnfolderBase]: 4415/8492 cut-off events. [2024-11-20 09:44:13,935 INFO L125 PetriNetUnfolderBase]: For 193941/193941 co-relation queries the response was YES. [2024-11-20 09:44:14,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65937 conditions, 8492 events. 4415/8492 cut-off events. For 193941/193941 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 63555 event pairs, 299 based on Foata normal form. 3/8495 useless extension candidates. Maximal degree in co-relation 65840. Up to 4233 conditions per place. [2024-11-20 09:44:14,035 INFO L140 encePairwiseOnDemand]: 13/29 looper letters, 356 selfloop transitions, 635 changer transitions 10/1003 dead transitions. [2024-11-20 09:44:14,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1003 transitions, 18270 flow [2024-11-20 09:44:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-20 09:44:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-20 09:44:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 450 transitions. [2024-11-20 09:44:14,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3301540719002201 [2024-11-20 09:44:14,037 INFO L175 Difference]: Start difference. First operand has 356 places, 812 transitions, 14632 flow. Second operand 47 states and 450 transitions. [2024-11-20 09:44:14,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1003 transitions, 18270 flow [2024-11-20 09:44:15,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1003 transitions, 17150 flow, removed 479 selfloop flow, removed 20 redundant places. [2024-11-20 09:44:15,405 INFO L231 Difference]: Finished difference. Result has 386 places, 844 transitions, 16053 flow [2024-11-20 09:44:15,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=13584, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=16053, PETRI_PLACES=386, PETRI_TRANSITIONS=844} [2024-11-20 09:44:15,406 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 357 predicate places. [2024-11-20 09:44:15,406 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 844 transitions, 16053 flow [2024-11-20 09:44:15,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:15,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:15,407 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:15,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:44:15,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:15,607 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:44:15,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash -700160860, now seen corresponding path program 6 times [2024-11-20 09:44:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:15,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102139960] [2024-11-20 09:44:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:15,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:16,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:16,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102139960] [2024-11-20 09:44:16,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102139960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:16,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434786955] [2024-11-20 09:44:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:44:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:16,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:16,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:44:16,701 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:44:16,702 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:16,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-20 09:44:16,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:17,390 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-20 09:44:17,390 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 24 treesize of output 10 [2024-11-20 09:44:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:17,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:18,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:18,373 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 40 treesize of output 32 [2024-11-20 09:44:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:18,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434786955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:18,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:18,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-11-20 09:44:18,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267770813] [2024-11-20 09:44:18,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:18,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-20 09:44:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-20 09:44:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2024-11-20 09:44:19,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 29 [2024-11-20 09:44:19,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 844 transitions, 16053 flow. Second operand has 52 states, 52 states have (on average 5.5) internal successors, (286), 52 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:19,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:19,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 29 [2024-11-20 09:44:19,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand