./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f 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 ../../../trunk/examples/svcomp/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 0.2.4-dev-a340643-m [2024-01-27 15:47:47,744 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:47:47,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:47:47,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:47:47,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:47:47,853 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:47:47,853 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:47:47,854 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:47:47,854 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:47:47,854 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:47:47,855 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:47:47,855 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:47:47,856 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:47:47,856 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:47:47,856 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:47:47,857 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:47:47,857 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:47:47,857 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:47:47,858 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:47:47,858 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:47:47,858 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:47:47,859 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:47:47,859 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:47:47,860 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:47:47,860 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:47:47,861 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:47:47,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:47:47,861 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:47:47,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:47:47,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:47:47,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:47:47,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:47:47,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:47:47,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:47:47,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:47:47,865 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:47:47,865 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:47:47,865 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:47:47,866 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:47:47,866 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:47:47,867 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:47:47,872 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:47:47,872 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:47:47,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 613bf9314e4e3fb6e64527ec38c7e6b39400e524de37a5103e9f06d9db406d3d [2024-01-27 15:47:48,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:47:48,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:47:48,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:47:48,137 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:47:48,137 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:47:48,138 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-01-27 15:47:49,273 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:47:49,473 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:47:49,474 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2024-01-27 15:47:49,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f35b0bbd/84ef76e64ce840aea5e21d401af41604/FLAG6fe37d0ff [2024-01-27 15:47:49,491 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f35b0bbd/84ef76e64ce840aea5e21d401af41604 [2024-01-27 15:47:49,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:47:49,494 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:47:49,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:47:49,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:47:49,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:47:49,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,501 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62661106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49, skipping insertion in model container [2024-01-27 15:47:49,501 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,522 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:47:49,687 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-01-27 15:47:49,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:47:49,719 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:47:49,761 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2896,2909] [2024-01-27 15:47:49,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:47:49,784 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:47:49,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49 WrapperNode [2024-01-27 15:47:49,785 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:47:49,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:47:49,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:47:49,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:47:49,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,804 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,826 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 171 [2024-01-27 15:47:49,826 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:47:49,827 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:47:49,827 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:47:49,827 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:47:49,838 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,842 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,855 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:47:49,855 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,856 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,864 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,867 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,873 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:47:49,874 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:47:49,874 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:47:49,874 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:47:49,874 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (1/1) ... [2024-01-27 15:47:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:47:49,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:49,915 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) [2024-01-27 15:47:49,930 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 [2024-01-27 15:47:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:47:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:47:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:47:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:47:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:47:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:47:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:47:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:47:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:47:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:47:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:47:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:47:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:47:49,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:47:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:47:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:47:49,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:47:49,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:47:49,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:47:49,970 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:47:50,079 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:47:50,080 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:47:50,329 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:47:50,329 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:47:50,564 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:47:50,564 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:47:50,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:47:50 BoogieIcfgContainer [2024-01-27 15:47:50,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:47:50,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:47:50,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:47:50,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:47:50,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:47:49" (1/3) ... [2024-01-27 15:47:50,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bce422a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:47:50, skipping insertion in model container [2024-01-27 15:47:50,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:47:49" (2/3) ... [2024-01-27 15:47:50,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bce422a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:47:50, skipping insertion in model container [2024-01-27 15:47:50,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:47:50" (3/3) ... [2024-01-27 15:47:50,573 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2024-01-27 15:47:50,581 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:47:50,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:47:50,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:47:50,589 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:47:50,634 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:47:50,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-01-27 15:47:50,711 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-01-27 15:47:50,712 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:47:50,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 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. 0/23 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-01-27 15:47:50,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-01-27 15:47:50,722 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 66 flow [2024-01-27 15:47:50,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:47:50,736 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@5d294734, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:47:50,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:47:50,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:47:50,749 INFO L124 PetriNetUnfolderBase]: 4/26 cut-off events. [2024-01-27 15:47:50,749 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:47:50,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:50,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:50,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:50,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash 2032880118, now seen corresponding path program 1 times [2024-01-27 15:47:50,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:50,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037953250] [2024-01-27 15:47:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:50,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:50,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:50,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037953250] [2024-01-27 15:47:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037953250] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:50,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:50,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:47:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859345404] [2024-01-27 15:47:50,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:47:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:47:51,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:47:51,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-01-27 15:47:51,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 66 flow. Second operand has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 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) [2024-01-27 15:47:51,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:51,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-01-27 15:47:51,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:51,143 INFO L124 PetriNetUnfolderBase]: 112/217 cut-off events. [2024-01-27 15:47:51,143 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-01-27 15:47:51,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 217 events. 112/217 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 718 event pairs, 87 based on Foata normal form. 14/212 useless extension candidates. Maximal degree in co-relation 366. Up to 187 conditions per place. [2024-01-27 15:47:51,147 INFO L140 encePairwiseOnDemand]: 29/30 looper letters, 21 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2024-01-27 15:47:51,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 26 transitions, 106 flow [2024-01-27 15:47:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:47:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:47:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-01-27 15:47:51,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-27 15:47:51,158 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 66 flow. Second operand 2 states and 36 transitions. [2024-01-27 15:47:51,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 26 transitions, 106 flow [2024-01-27 15:47:51,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:47:51,161 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 56 flow [2024-01-27 15:47:51,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2024-01-27 15:47:51,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2024-01-27 15:47:51,166 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 56 flow [2024-01-27 15:47:51,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.5) internal successors, (31), 2 states have internal predecessors, (31), 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) [2024-01-27 15:47:51,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:51,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:51,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:47:51,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:51,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:51,168 INFO L85 PathProgramCache]: Analyzing trace with hash 992840007, now seen corresponding path program 1 times [2024-01-27 15:47:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:51,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938460948] [2024-01-27 15:47:51,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:51,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:51,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938460948] [2024-01-27 15:47:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938460948] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:51,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:51,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:47:51,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605332792] [2024-01-27 15:47:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:51,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:47:51,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:47:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:47:51,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-01-27 15:47:51,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-01-27 15:47:51,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:51,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-01-27 15:47:51,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:51,494 INFO L124 PetriNetUnfolderBase]: 120/235 cut-off events. [2024-01-27 15:47:51,494 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-01-27 15:47:51,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 235 events. 120/235 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 748 event pairs, 37 based on Foata normal form. 3/224 useless extension candidates. Maximal degree in co-relation 445. Up to 168 conditions per place. [2024-01-27 15:47:51,501 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 25 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2024-01-27 15:47:51,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 33 transitions, 127 flow [2024-01-27 15:47:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:47:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:47:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-01-27 15:47:51,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-01-27 15:47:51,504 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 56 flow. Second operand 3 states and 50 transitions. [2024-01-27 15:47:51,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 33 transitions, 127 flow [2024-01-27 15:47:51,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 33 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:47:51,508 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 75 flow [2024-01-27 15:47:51,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2024-01-27 15:47:51,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2024-01-27 15:47:51,509 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 75 flow [2024-01-27 15:47:51,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-01-27 15:47:51,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:51,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:51,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:47:51,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:51,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash -357843081, now seen corresponding path program 2 times [2024-01-27 15:47:51,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:51,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563135081] [2024-01-27 15:47:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:51,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:51,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563135081] [2024-01-27 15:47:51,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563135081] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:51,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:51,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:47:51,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095664132] [2024-01-27 15:47:51,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:51,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:47:51,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:47:51,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:47:51,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-01-27 15:47:51,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-01-27 15:47:51,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:51,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-01-27 15:47:51,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:51,847 INFO L124 PetriNetUnfolderBase]: 133/276 cut-off events. [2024-01-27 15:47:51,847 INFO L125 PetriNetUnfolderBase]: For 48/50 co-relation queries the response was YES. [2024-01-27 15:47:51,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 276 events. 133/276 cut-off events. For 48/50 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 978 event pairs, 97 based on Foata normal form. 11/272 useless extension candidates. Maximal degree in co-relation 584. Up to 202 conditions per place. [2024-01-27 15:47:51,850 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 22 selfloop transitions, 2 changer transitions 8/37 dead transitions. [2024-01-27 15:47:51,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 159 flow [2024-01-27 15:47:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:47:51,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:47:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-01-27 15:47:51,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:47:51,854 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 75 flow. Second operand 4 states and 60 transitions. [2024-01-27 15:47:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 159 flow [2024-01-27 15:47:51,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:47:51,856 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 88 flow [2024-01-27 15:47:51,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2024-01-27 15:47:51,858 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-01-27 15:47:51,858 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 88 flow [2024-01-27 15:47:51,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2024-01-27 15:47:51,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:51,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:51,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:47:51,860 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:51,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:51,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2107095792, now seen corresponding path program 1 times [2024-01-27 15:47:51,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:51,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340552815] [2024-01-27 15:47:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:51,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:52,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:52,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340552815] [2024-01-27 15:47:52,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340552815] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:52,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:52,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130763416] [2024-01-27 15:47:52,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:52,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:52,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:52,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:52,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:52,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 88 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:52,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:52,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:52,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:52,770 INFO L124 PetriNetUnfolderBase]: 182/358 cut-off events. [2024-01-27 15:47:52,770 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-01-27 15:47:52,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 358 events. 182/358 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1373 event pairs, 13 based on Foata normal form. 1/358 useless extension candidates. Maximal degree in co-relation 775. Up to 211 conditions per place. [2024-01-27 15:47:52,773 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 45 selfloop transitions, 13 changer transitions 6/68 dead transitions. [2024-01-27 15:47:52,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 68 transitions, 315 flow [2024-01-27 15:47:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-01-27 15:47:52,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-01-27 15:47:52,777 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 88 flow. Second operand 10 states and 124 transitions. [2024-01-27 15:47:52,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 68 transitions, 315 flow [2024-01-27 15:47:52,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 68 transitions, 305 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-01-27 15:47:52,780 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 154 flow [2024-01-27 15:47:52,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=154, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-01-27 15:47:52,782 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-01-27 15:47:52,783 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 154 flow [2024-01-27 15:47:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:52,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:52,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:47:52,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:52,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1231142744, now seen corresponding path program 2 times [2024-01-27 15:47:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:52,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721504489] [2024-01-27 15:47:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:52,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:53,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:53,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721504489] [2024-01-27 15:47:53,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721504489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:53,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:53,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:53,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647416555] [2024-01-27 15:47:53,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:53,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:53,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:53,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:53,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:53,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 154 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:53,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:53,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:53,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:53,469 INFO L124 PetriNetUnfolderBase]: 207/420 cut-off events. [2024-01-27 15:47:53,470 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2024-01-27 15:47:53,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 420 events. 207/420 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1802 event pairs, 30 based on Foata normal form. 1/420 useless extension candidates. Maximal degree in co-relation 1127. Up to 244 conditions per place. [2024-01-27 15:47:53,473 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 47 selfloop transitions, 20 changer transitions 6/77 dead transitions. [2024-01-27 15:47:53,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 444 flow [2024-01-27 15:47:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:53,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-01-27 15:47:53,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-01-27 15:47:53,478 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 154 flow. Second operand 10 states and 127 transitions. [2024-01-27 15:47:53,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 444 flow [2024-01-27 15:47:53,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 435 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-01-27 15:47:53,485 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 276 flow [2024-01-27 15:47:53,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-01-27 15:47:53,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2024-01-27 15:47:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 276 flow [2024-01-27 15:47:53,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:53,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:53,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:47:53,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -412078012, now seen corresponding path program 3 times [2024-01-27 15:47:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383029540] [2024-01-27 15:47:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:53,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:53,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383029540] [2024-01-27 15:47:53,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383029540] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:53,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765415525] [2024-01-27 15:47:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:53,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:53,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:53,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:53,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:53,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:54,179 INFO L124 PetriNetUnfolderBase]: 225/475 cut-off events. [2024-01-27 15:47:54,180 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2024-01-27 15:47:54,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 475 events. 225/475 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2225 event pairs, 9 based on Foata normal form. 1/476 useless extension candidates. Maximal degree in co-relation 1477. Up to 230 conditions per place. [2024-01-27 15:47:54,184 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 26 changer transitions 6/88 dead transitions. [2024-01-27 15:47:54,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 88 transitions, 589 flow [2024-01-27 15:47:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:47:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:47:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-01-27 15:47:54,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-01-27 15:47:54,186 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 276 flow. Second operand 11 states and 138 transitions. [2024-01-27 15:47:54,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 88 transitions, 589 flow [2024-01-27 15:47:54,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 566 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-27 15:47:54,190 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 351 flow [2024-01-27 15:47:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=351, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-01-27 15:47:54,191 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 34 predicate places. [2024-01-27 15:47:54,191 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 351 flow [2024-01-27 15:47:54,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:54,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:54,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:47:54,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:54,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:54,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2011195514, now seen corresponding path program 4 times [2024-01-27 15:47:54,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:54,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786446423] [2024-01-27 15:47:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:54,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:54,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:54,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786446423] [2024-01-27 15:47:54,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786446423] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:54,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746148537] [2024-01-27 15:47:54,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:54,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:54,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:54,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:54,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 351 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:54,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:54,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:54,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:54,797 INFO L124 PetriNetUnfolderBase]: 224/484 cut-off events. [2024-01-27 15:47:54,797 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2024-01-27 15:47:54,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1660 conditions, 484 events. 224/484 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2315 event pairs, 39 based on Foata normal form. 1/485 useless extension candidates. Maximal degree in co-relation 1642. Up to 295 conditions per place. [2024-01-27 15:47:54,802 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 6/84 dead transitions. [2024-01-27 15:47:54,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 84 transitions, 649 flow [2024-01-27 15:47:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-01-27 15:47:54,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-01-27 15:47:54,803 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 351 flow. Second operand 10 states and 126 transitions. [2024-01-27 15:47:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 84 transitions, 649 flow [2024-01-27 15:47:54,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 84 transitions, 588 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-01-27 15:47:54,809 INFO L231 Difference]: Finished difference. Result has 69 places, 57 transitions, 392 flow [2024-01-27 15:47:54,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=392, PETRI_PLACES=69, PETRI_TRANSITIONS=57} [2024-01-27 15:47:54,810 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-01-27 15:47:54,810 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 57 transitions, 392 flow [2024-01-27 15:47:54,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:54,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:54,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:54,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:47:54,811 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:54,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:54,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1313799150, now seen corresponding path program 5 times [2024-01-27 15:47:54,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:54,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956660184] [2024-01-27 15:47:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:54,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:55,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:55,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956660184] [2024-01-27 15:47:55,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956660184] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:55,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:55,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:55,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384393148] [2024-01-27 15:47:55,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:55,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:55,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:55,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:55,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 57 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:55,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:55,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:55,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:55,457 INFO L124 PetriNetUnfolderBase]: 238/523 cut-off events. [2024-01-27 15:47:55,457 INFO L125 PetriNetUnfolderBase]: For 1102/1102 co-relation queries the response was YES. [2024-01-27 15:47:55,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 523 events. 238/523 cut-off events. For 1102/1102 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2631 event pairs, 29 based on Foata normal form. 1/524 useless extension candidates. Maximal degree in co-relation 1784. Up to 320 conditions per place. [2024-01-27 15:47:55,462 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 56 selfloop transitions, 23 changer transitions 6/89 dead transitions. [2024-01-27 15:47:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 691 flow [2024-01-27 15:47:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-01-27 15:47:55,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42333333333333334 [2024-01-27 15:47:55,463 INFO L175 Difference]: Start difference. First operand has 69 places, 57 transitions, 392 flow. Second operand 10 states and 127 transitions. [2024-01-27 15:47:55,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 691 flow [2024-01-27 15:47:55,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 648 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-01-27 15:47:55,468 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 436 flow [2024-01-27 15:47:55,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=436, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2024-01-27 15:47:55,469 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2024-01-27 15:47:55,469 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 436 flow [2024-01-27 15:47:55,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:55,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:55,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:55,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-01-27 15:47:55,470 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:55,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1011459612, now seen corresponding path program 6 times [2024-01-27 15:47:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:55,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632663844] [2024-01-27 15:47:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:55,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:55,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:55,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:55,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632663844] [2024-01-27 15:47:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632663844] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:55,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770439277] [2024-01-27 15:47:55,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:55,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:55,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:55,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:55,989 INFO L124 PetriNetUnfolderBase]: 232/506 cut-off events. [2024-01-27 15:47:55,989 INFO L125 PetriNetUnfolderBase]: For 1700/1708 co-relation queries the response was YES. [2024-01-27 15:47:55,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1875 conditions, 506 events. 232/506 cut-off events. For 1700/1708 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2468 event pairs, 31 based on Foata normal form. 9/515 useless extension candidates. Maximal degree in co-relation 1853. Up to 325 conditions per place. [2024-01-27 15:47:55,993 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 49 selfloop transitions, 22 changer transitions 9/84 dead transitions. [2024-01-27 15:47:55,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 84 transitions, 701 flow [2024-01-27 15:47:55,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:55,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:55,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 121 transitions. [2024-01-27 15:47:55,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033333333333333 [2024-01-27 15:47:55,995 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 436 flow. Second operand 10 states and 121 transitions. [2024-01-27 15:47:55,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 84 transitions, 701 flow [2024-01-27 15:47:55,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 84 transitions, 644 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-01-27 15:47:55,999 INFO L231 Difference]: Finished difference. Result has 78 places, 60 transitions, 432 flow [2024-01-27 15:47:56,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=432, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2024-01-27 15:47:56,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 48 predicate places. [2024-01-27 15:47:56,000 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 432 flow [2024-01-27 15:47:56,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:56,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:56,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:56,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:47:56,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:56,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash 504670824, now seen corresponding path program 7 times [2024-01-27 15:47:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429261566] [2024-01-27 15:47:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:56,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429261566] [2024-01-27 15:47:56,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429261566] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:56,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:56,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:56,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107038072] [2024-01-27 15:47:56,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:56,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:56,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:56,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:56,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:56,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:56,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:56,574 INFO L124 PetriNetUnfolderBase]: 244/539 cut-off events. [2024-01-27 15:47:56,575 INFO L125 PetriNetUnfolderBase]: For 1873/1885 co-relation queries the response was YES. [2024-01-27 15:47:56,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1992 conditions, 539 events. 244/539 cut-off events. For 1873/1885 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2713 event pairs, 41 based on Foata normal form. 3/542 useless extension candidates. Maximal degree in co-relation 1969. Up to 332 conditions per place. [2024-01-27 15:47:56,579 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 23 changer transitions 6/92 dead transitions. [2024-01-27 15:47:56,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 780 flow [2024-01-27 15:47:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-01-27 15:47:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-01-27 15:47:56,581 INFO L175 Difference]: Start difference. First operand has 78 places, 60 transitions, 432 flow. Second operand 10 states and 129 transitions. [2024-01-27 15:47:56,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 780 flow [2024-01-27 15:47:56,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 726 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-01-27 15:47:56,586 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 475 flow [2024-01-27 15:47:56,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-01-27 15:47:56,587 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2024-01-27 15:47:56,587 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 475 flow [2024-01-27 15:47:56,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:56,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:56,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:56,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:47:56,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:56,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:56,589 INFO L85 PathProgramCache]: Analyzing trace with hash 955272416, now seen corresponding path program 8 times [2024-01-27 15:47:56,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:56,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618366304] [2024-01-27 15:47:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:56,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:56,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:56,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618366304] [2024-01-27 15:47:56,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618366304] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:56,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:56,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215931755] [2024-01-27 15:47:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:56,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:56,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:56,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 475 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:56,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:56,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:56,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:57,075 INFO L124 PetriNetUnfolderBase]: 238/522 cut-off events. [2024-01-27 15:47:57,075 INFO L125 PetriNetUnfolderBase]: For 2576/2598 co-relation queries the response was YES. [2024-01-27 15:47:57,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2058 conditions, 522 events. 238/522 cut-off events. For 2576/2598 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2602 event pairs, 41 based on Foata normal form. 11/533 useless extension candidates. Maximal degree in co-relation 2033. Up to 337 conditions per place. [2024-01-27 15:47:57,080 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 22 changer transitions 9/87 dead transitions. [2024-01-27 15:47:57,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 781 flow [2024-01-27 15:47:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:57,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-01-27 15:47:57,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-01-27 15:47:57,081 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 475 flow. Second operand 10 states and 123 transitions. [2024-01-27 15:47:57,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 781 flow [2024-01-27 15:47:57,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 714 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-01-27 15:47:57,090 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 463 flow [2024-01-27 15:47:57,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=463, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2024-01-27 15:47:57,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2024-01-27 15:47:57,091 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 463 flow [2024-01-27 15:47:57,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:57,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:57,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:57,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:47:57,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:57,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:57,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1868189800, now seen corresponding path program 9 times [2024-01-27 15:47:57,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:57,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16186757] [2024-01-27 15:47:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:57,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:57,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:57,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16186757] [2024-01-27 15:47:57,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16186757] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:57,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744322985] [2024-01-27 15:47:57,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:57,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:57,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:57,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:57,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 63 transitions, 463 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:57,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:57,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:57,773 INFO L124 PetriNetUnfolderBase]: 254/557 cut-off events. [2024-01-27 15:47:57,774 INFO L125 PetriNetUnfolderBase]: For 2835/2859 co-relation queries the response was YES. [2024-01-27 15:47:57,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 557 events. 254/557 cut-off events. For 2835/2859 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2778 event pairs, 48 based on Foata normal form. 5/561 useless extension candidates. Maximal degree in co-relation 2161. Up to 344 conditions per place. [2024-01-27 15:47:57,778 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 62 selfloop transitions, 22 changer transitions 6/94 dead transitions. [2024-01-27 15:47:57,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 834 flow [2024-01-27 15:47:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-01-27 15:47:57,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-01-27 15:47:57,780 INFO L175 Difference]: Start difference. First operand has 83 places, 63 transitions, 463 flow. Second operand 10 states and 130 transitions. [2024-01-27 15:47:57,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 834 flow [2024-01-27 15:47:57,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 94 transitions, 778 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-01-27 15:47:57,787 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 512 flow [2024-01-27 15:47:57,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=512, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2024-01-27 15:47:57,788 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 55 predicate places. [2024-01-27 15:47:57,788 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 512 flow [2024-01-27 15:47:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:57,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:57,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:57,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-01-27 15:47:57,789 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:57,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:57,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1339153282, now seen corresponding path program 10 times [2024-01-27 15:47:57,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:57,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268971501] [2024-01-27 15:47:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:57,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:57,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:47:58,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:58,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268971501] [2024-01-27 15:47:58,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268971501] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:47:58,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:47:58,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-01-27 15:47:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068119125] [2024-01-27 15:47:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:47:58,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-01-27 15:47:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:58,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-01-27 15:47:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-01-27 15:47:58,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-01-27 15:47:58,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 512 flow. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:58,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:58,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-01-27 15:47:58,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:58,313 INFO L124 PetriNetUnfolderBase]: 248/540 cut-off events. [2024-01-27 15:47:58,313 INFO L125 PetriNetUnfolderBase]: For 3762/3802 co-relation queries the response was YES. [2024-01-27 15:47:58,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 540 events. 248/540 cut-off events. For 3762/3802 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2654 event pairs, 48 based on Foata normal form. 13/552 useless extension candidates. Maximal degree in co-relation 2211. Up to 349 conditions per place. [2024-01-27 15:47:58,317 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 55 selfloop transitions, 21 changer transitions 9/89 dead transitions. [2024-01-27 15:47:58,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 89 transitions, 825 flow [2024-01-27 15:47:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:47:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:47:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-01-27 15:47:58,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2024-01-27 15:47:58,320 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 512 flow. Second operand 10 states and 124 transitions. [2024-01-27 15:47:58,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 89 transitions, 825 flow [2024-01-27 15:47:58,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 750 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-01-27 15:47:58,329 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 492 flow [2024-01-27 15:47:58,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=492, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-01-27 15:47:58,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 58 predicate places. [2024-01-27 15:47:58,330 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 492 flow [2024-01-27 15:47:58,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 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) [2024-01-27 15:47:58,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:58,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:47:58,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-01-27 15:47:58,331 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:58,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:58,332 INFO L85 PathProgramCache]: Analyzing trace with hash 104941628, now seen corresponding path program 1 times [2024-01-27 15:47:58,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:58,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861623457] [2024-01-27 15:47:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:58,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861623457] [2024-01-27 15:47:58,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861623457] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:58,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062930658] [2024-01-27 15:47:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:58,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:58,436 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) [2024-01-27 15:47:58,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:47:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:58,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:47:58,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:58,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:47:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062930658] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:47:58,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:47:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-01-27 15:47:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440467385] [2024-01-27 15:47:58,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:47:58,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-01-27 15:47:58,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:47:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-01-27 15:47:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-01-27 15:47:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-01-27 15:47:58,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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) [2024-01-27 15:47:58,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:47:58,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-01-27 15:47:58,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:58,949 INFO L124 PetriNetUnfolderBase]: 399/944 cut-off events. [2024-01-27 15:47:58,949 INFO L125 PetriNetUnfolderBase]: For 6967/7017 co-relation queries the response was YES. [2024-01-27 15:47:58,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3909 conditions, 944 events. 399/944 cut-off events. For 6967/7017 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5780 event pairs, 190 based on Foata normal form. 38/980 useless extension candidates. Maximal degree in co-relation 3880. Up to 410 conditions per place. [2024-01-27 15:47:58,957 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 108 selfloop transitions, 5 changer transitions 10/128 dead transitions. [2024-01-27 15:47:58,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 128 transitions, 1211 flow [2024-01-27 15:47:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:47:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:47:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-01-27 15:47:58,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-01-27 15:47:58,958 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 492 flow. Second operand 6 states and 91 transitions. [2024-01-27 15:47:58,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 128 transitions, 1211 flow [2024-01-27 15:47:58,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 128 transitions, 1101 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-01-27 15:47:58,970 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 481 flow [2024-01-27 15:47:58,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=481, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2024-01-27 15:47:58,971 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2024-01-27 15:47:58,971 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 481 flow [2024-01-27 15:47:58,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.75) internal successors, (129), 12 states have internal predecessors, (129), 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) [2024-01-27 15:47:58,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:47:58,972 INFO L208 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, 1] [2024-01-27 15:47:58,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:47:59,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:47:59,188 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:47:59,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:47:59,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1433985943, now seen corresponding path program 2 times [2024-01-27 15:47:59,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:47:59,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492583233] [2024-01-27 15:47:59,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:47:59,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:47:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:47:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:47:59,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:47:59,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492583233] [2024-01-27 15:47:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492583233] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:47:59,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844944616] [2024-01-27 15:47:59,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:47:59,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:47:59,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:47:59,646 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) [2024-01-27 15:47:59,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:47:59,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:47:59,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:47:59,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:47:59,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:47:59,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-27 15:48:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:00,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:00,124 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:48:00,126 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 11 [2024-01-27 15:48:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844944616] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:00,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:00,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:48:00,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623366802] [2024-01-27 15:48:00,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:00,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:48:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:00,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:48:00,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:48:00,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-01-27 15:48:00,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 481 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2024-01-27 15:48:00,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:00,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-01-27 15:48:00,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:01,893 INFO L124 PetriNetUnfolderBase]: 1521/3128 cut-off events. [2024-01-27 15:48:01,894 INFO L125 PetriNetUnfolderBase]: For 23941/23945 co-relation queries the response was YES. [2024-01-27 15:48:01,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12534 conditions, 3128 events. 1521/3128 cut-off events. For 23941/23945 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 20907 event pairs, 160 based on Foata normal form. 70/3197 useless extension candidates. Maximal degree in co-relation 12503. Up to 587 conditions per place. [2024-01-27 15:48:01,916 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 321 selfloop transitions, 94 changer transitions 0/418 dead transitions. [2024-01-27 15:48:01,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 418 transitions, 3415 flow [2024-01-27 15:48:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-01-27 15:48:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-01-27 15:48:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 507 transitions. [2024-01-27 15:48:01,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4970588235294118 [2024-01-27 15:48:01,918 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 481 flow. Second operand 34 states and 507 transitions. [2024-01-27 15:48:01,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 418 transitions, 3415 flow [2024-01-27 15:48:01,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 418 transitions, 3300 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-01-27 15:48:01,952 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1659 flow [2024-01-27 15:48:01,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1659, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-01-27 15:48:01,954 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 102 predicate places. [2024-01-27 15:48:01,954 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1659 flow [2024-01-27 15:48:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2024-01-27 15:48:01,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:01,954 INFO L208 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, 1] [2024-01-27 15:48:01,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:48:02,169 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:02,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -305326095, now seen corresponding path program 3 times [2024-01-27 15:48:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915651722] [2024-01-27 15:48:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:02,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:02,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915651722] [2024-01-27 15:48:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915651722] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479765461] [2024-01-27 15:48:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:48:02,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:02,543 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) [2024-01-27 15:48:02,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:48:02,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:48:02,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:02,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2024-01-27 15:48:02,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:02,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:02,994 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:48:02,994 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 [2024-01-27 15:48:03,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479765461] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:03,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:03,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-01-27 15:48:03,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170757521] [2024-01-27 15:48:03,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:48:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:48:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:48:03,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-01-27 15:48:03,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1659 flow. Second operand has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 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) [2024-01-27 15:48:03,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:03,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-01-27 15:48:03,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:04,619 INFO L124 PetriNetUnfolderBase]: 2645/5230 cut-off events. [2024-01-27 15:48:04,620 INFO L125 PetriNetUnfolderBase]: For 64293/64295 co-relation queries the response was YES. [2024-01-27 15:48:04,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24282 conditions, 5230 events. 2645/5230 cut-off events. For 64293/64295 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 34884 event pairs, 429 based on Foata normal form. 74/5303 useless extension candidates. Maximal degree in co-relation 24237. Up to 1345 conditions per place. [2024-01-27 15:48:04,678 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 289 selfloop transitions, 113 changer transitions 0/405 dead transitions. [2024-01-27 15:48:04,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 405 transitions, 4352 flow [2024-01-27 15:48:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:48:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:48:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 276 transitions. [2024-01-27 15:48:04,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2024-01-27 15:48:04,682 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1659 flow. Second operand 19 states and 276 transitions. [2024-01-27 15:48:04,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 405 transitions, 4352 flow [2024-01-27 15:48:04,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 405 transitions, 3619 flow, removed 364 selfloop flow, removed 2 redundant places. [2024-01-27 15:48:04,889 INFO L231 Difference]: Finished difference. Result has 156 places, 227 transitions, 2191 flow [2024-01-27 15:48:04,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2191, PETRI_PLACES=156, PETRI_TRANSITIONS=227} [2024-01-27 15:48:04,890 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2024-01-27 15:48:04,890 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 227 transitions, 2191 flow [2024-01-27 15:48:04,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.7727272727272725) internal successors, (171), 22 states have internal predecessors, (171), 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) [2024-01-27 15:48:04,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:04,890 INFO L208 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, 1] [2024-01-27 15:48:04,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:05,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:05,105 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:05,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:05,106 INFO L85 PathProgramCache]: Analyzing trace with hash -671863928, now seen corresponding path program 1 times [2024-01-27 15:48:05,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:05,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116646081] [2024-01-27 15:48:05,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:05,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:05,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116646081] [2024-01-27 15:48:05,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116646081] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:05,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274495901] [2024-01-27 15:48:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:05,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:05,205 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) [2024-01-27 15:48:05,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:48:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:05,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-27 15:48:05,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:05,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:48:05,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274495901] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:48:05,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:48:05,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-01-27 15:48:05,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23184857] [2024-01-27 15:48:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:48:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:48:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:48:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-01-27 15:48:05,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-01-27 15:48:05,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 227 transitions, 2191 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-01-27 15:48:05,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:05,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-01-27 15:48:05,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:06,098 INFO L124 PetriNetUnfolderBase]: 2095/4598 cut-off events. [2024-01-27 15:48:06,099 INFO L125 PetriNetUnfolderBase]: For 43372/43778 co-relation queries the response was YES. [2024-01-27 15:48:06,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19631 conditions, 4598 events. 2095/4598 cut-off events. For 43372/43778 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 33427 event pairs, 640 based on Foata normal form. 164/4726 useless extension candidates. Maximal degree in co-relation 19578. Up to 2596 conditions per place. [2024-01-27 15:48:06,141 INFO L140 encePairwiseOnDemand]: 26/30 looper letters, 167 selfloop transitions, 41 changer transitions 29/262 dead transitions. [2024-01-27 15:48:06,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 262 transitions, 2784 flow [2024-01-27 15:48:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:48:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:48:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-01-27 15:48:06,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-01-27 15:48:06,142 INFO L175 Difference]: Start difference. First operand has 156 places, 227 transitions, 2191 flow. Second operand 4 states and 81 transitions. [2024-01-27 15:48:06,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 262 transitions, 2784 flow [2024-01-27 15:48:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 262 transitions, 2705 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-01-27 15:48:06,287 INFO L231 Difference]: Finished difference. Result has 154 places, 205 transitions, 1989 flow [2024-01-27 15:48:06,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1989, PETRI_PLACES=154, PETRI_TRANSITIONS=205} [2024-01-27 15:48:06,288 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2024-01-27 15:48:06,288 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 205 transitions, 1989 flow [2024-01-27 15:48:06,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-01-27 15:48:06,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:06,288 INFO L208 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, 1] [2024-01-27 15:48:06,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:48:06,507 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:06,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1684752856, now seen corresponding path program 4 times [2024-01-27 15:48:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:06,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546180004] [2024-01-27 15:48:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:06,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:07,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:07,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546180004] [2024-01-27 15:48:07,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546180004] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:07,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964320572] [2024-01-27 15:48:07,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:48:07,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:07,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:07,140 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) [2024-01-27 15:48:07,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:48:07,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:48:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:07,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:48:07,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:48:07,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:07,377 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:48:07,377 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 [2024-01-27 15:48:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:48:07,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964320572] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:07,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:07,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 16 [2024-01-27 15:48:07,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980521873] [2024-01-27 15:48:07,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:07,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:48:07,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:48:07,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:48:07,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 30 [2024-01-27 15:48:07,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 205 transitions, 1989 flow. Second operand has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 17 states have internal predecessors, (135), 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) [2024-01-27 15:48:07,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:07,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 30 [2024-01-27 15:48:07,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:08,453 INFO L124 PetriNetUnfolderBase]: 2950/5666 cut-off events. [2024-01-27 15:48:08,453 INFO L125 PetriNetUnfolderBase]: For 57460/57460 co-relation queries the response was YES. [2024-01-27 15:48:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26001 conditions, 5666 events. 2950/5666 cut-off events. For 57460/57460 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 37672 event pairs, 653 based on Foata normal form. 12/5676 useless extension candidates. Maximal degree in co-relation 25946. Up to 2475 conditions per place. [2024-01-27 15:48:08,505 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 244 selfloop transitions, 73 changer transitions 0/320 dead transitions. [2024-01-27 15:48:08,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 320 transitions, 3510 flow [2024-01-27 15:48:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:48:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:48:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 159 transitions. [2024-01-27 15:48:08,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-01-27 15:48:08,507 INFO L175 Difference]: Start difference. First operand has 154 places, 205 transitions, 1989 flow. Second operand 13 states and 159 transitions. [2024-01-27 15:48:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 320 transitions, 3510 flow [2024-01-27 15:48:08,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 320 transitions, 3130 flow, removed 175 selfloop flow, removed 16 redundant places. [2024-01-27 15:48:08,650 INFO L231 Difference]: Finished difference. Result has 133 places, 217 transitions, 2116 flow [2024-01-27 15:48:08,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2116, PETRI_PLACES=133, PETRI_TRANSITIONS=217} [2024-01-27 15:48:08,651 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-01-27 15:48:08,651 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 217 transitions, 2116 flow [2024-01-27 15:48:08,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.9411764705882355) internal successors, (135), 17 states have internal predecessors, (135), 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) [2024-01-27 15:48:08,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:08,652 INFO L208 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, 1] [2024-01-27 15:48:08,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:08,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:48:08,855 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:08,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash 2118203479, now seen corresponding path program 1 times [2024-01-27 15:48:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290969499] [2024-01-27 15:48:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:08,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290969499] [2024-01-27 15:48:09,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290969499] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:09,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947774324] [2024-01-27 15:48:09,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:09,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:09,891 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) [2024-01-27 15:48:09,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:48:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:09,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:48:09,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:11,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:11,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:11,827 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 [2024-01-27 15:48:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:12,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947774324] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:12,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:12,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-01-27 15:48:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320031062] [2024-01-27 15:48:12,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:12,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-27 15:48:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-27 15:48:12,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2024-01-27 15:48:12,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:48:12,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 217 transitions, 2116 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:48:12,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:12,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:48:12,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:23,505 INFO L124 PetriNetUnfolderBase]: 5190/9697 cut-off events. [2024-01-27 15:48:23,506 INFO L125 PetriNetUnfolderBase]: For 68544/68544 co-relation queries the response was YES. [2024-01-27 15:48:23,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 9697 events. 5190/9697 cut-off events. For 68544/68544 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 69873 event pairs, 747 based on Foata normal form. 4/9701 useless extension candidates. Maximal degree in co-relation 41444. Up to 5575 conditions per place. [2024-01-27 15:48:23,583 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 439 selfloop transitions, 351 changer transitions 12/804 dead transitions. [2024-01-27 15:48:23,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 804 transitions, 8719 flow [2024-01-27 15:48:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-27 15:48:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-27 15:48:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 646 transitions. [2024-01-27 15:48:23,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871111111111111 [2024-01-27 15:48:23,592 INFO L175 Difference]: Start difference. First operand has 133 places, 217 transitions, 2116 flow. Second operand 75 states and 646 transitions. [2024-01-27 15:48:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 804 transitions, 8719 flow [2024-01-27 15:48:23,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 804 transitions, 8613 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-01-27 15:48:23,866 INFO L231 Difference]: Finished difference. Result has 217 places, 551 transitions, 6972 flow [2024-01-27 15:48:23,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=6972, PETRI_PLACES=217, PETRI_TRANSITIONS=551} [2024-01-27 15:48:23,867 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-01-27 15:48:23,867 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 551 transitions, 6972 flow [2024-01-27 15:48:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:48:23,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:23,867 INFO L208 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, 1] [2024-01-27 15:48:23,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:48:24,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:24,077 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:24,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1244542243, now seen corresponding path program 2 times [2024-01-27 15:48:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146119156] [2024-01-27 15:48:24,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:24,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:25,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:25,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146119156] [2024-01-27 15:48:25,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146119156] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:25,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299358260] [2024-01-27 15:48:25,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:48:25,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:25,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:25,323 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) [2024-01-27 15:48:25,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:48:25,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:25,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:48:25,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:26,201 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-01-27 15:48:26,201 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 [2024-01-27 15:48:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:26,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:27,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:27,120 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 [2024-01-27 15:48:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299358260] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:27,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-01-27 15:48:27,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124531138] [2024-01-27 15:48:27,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:27,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-27 15:48:27,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:27,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-27 15:48:27,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2434, Unknown=0, NotChecked=0, Total=2652 [2024-01-27 15:48:27,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:48:27,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 551 transitions, 6972 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:48:27,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:27,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:48:27,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:48:38,555 INFO L124 PetriNetUnfolderBase]: 5751/10804 cut-off events. [2024-01-27 15:48:38,556 INFO L125 PetriNetUnfolderBase]: For 97415/97415 co-relation queries the response was YES. [2024-01-27 15:48:38,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54215 conditions, 10804 events. 5751/10804 cut-off events. For 97415/97415 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 80005 event pairs, 817 based on Foata normal form. 4/10808 useless extension candidates. Maximal degree in co-relation 54157. Up to 6187 conditions per place. [2024-01-27 15:48:38,668 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 530 selfloop transitions, 467 changer transitions 12/1011 dead transitions. [2024-01-27 15:48:38,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1011 transitions, 12638 flow [2024-01-27 15:48:38,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-01-27 15:48:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2024-01-27 15:48:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 604 transitions. [2024-01-27 15:48:38,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.296078431372549 [2024-01-27 15:48:38,678 INFO L175 Difference]: Start difference. First operand has 217 places, 551 transitions, 6972 flow. Second operand 68 states and 604 transitions. [2024-01-27 15:48:38,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1011 transitions, 12638 flow [2024-01-27 15:48:39,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1011 transitions, 12075 flow, removed 276 selfloop flow, removed 6 redundant places. [2024-01-27 15:48:39,239 INFO L231 Difference]: Finished difference. Result has 300 places, 760 transitions, 10438 flow [2024-01-27 15:48:39,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=10438, PETRI_PLACES=300, PETRI_TRANSITIONS=760} [2024-01-27 15:48:39,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-01-27 15:48:39,240 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 760 transitions, 10438 flow [2024-01-27 15:48:39,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:48:39,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:39,241 INFO L208 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, 1] [2024-01-27 15:48:39,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:48:39,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:39,447 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:39,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:39,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1362324475, now seen corresponding path program 3 times [2024-01-27 15:48:39,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:39,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290616965] [2024-01-27 15:48:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:39,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290616965] [2024-01-27 15:48:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290616965] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569840918] [2024-01-27 15:48:40,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:48:40,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:40,624 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) [2024-01-27 15:48:40,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:48:40,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:48:40,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:40,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2024-01-27 15:48:40,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:41,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2024-01-27 15:48:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:41,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:42,643 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:48:42,644 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 [2024-01-27 15:48:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:43,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569840918] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:43,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:43,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2024-01-27 15:48:43,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618061084] [2024-01-27 15:48:43,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:43,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-01-27 15:48:43,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-01-27 15:48:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2024-01-27 15:48:43,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:48:43,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 760 transitions, 10438 flow. Second operand has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 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) [2024-01-27 15:48:43,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:43,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:48:43,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:11,476 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 [] [2024-01-27 15:49:14,057 INFO L124 PetriNetUnfolderBase]: 7033/13407 cut-off events. [2024-01-27 15:49:14,058 INFO L125 PetriNetUnfolderBase]: For 156842/156842 co-relation queries the response was YES. [2024-01-27 15:49:14,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76468 conditions, 13407 events. 7033/13407 cut-off events. For 156842/156842 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 105696 event pairs, 693 based on Foata normal form. 6/13409 useless extension candidates. Maximal degree in co-relation 76388. Up to 6096 conditions per place. [2024-01-27 15:49:14,211 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 701 selfloop transitions, 973 changer transitions 34/1710 dead transitions. [2024-01-27 15:49:14,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1710 transitions, 23548 flow [2024-01-27 15:49:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-01-27 15:49:14,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2024-01-27 15:49:14,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 1262 transitions. [2024-01-27 15:49:14,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026378896882494 [2024-01-27 15:49:14,215 INFO L175 Difference]: Start difference. First operand has 300 places, 760 transitions, 10438 flow. Second operand 139 states and 1262 transitions. [2024-01-27 15:49:14,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1710 transitions, 23548 flow [2024-01-27 15:49:15,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1710 transitions, 23085 flow, removed 212 selfloop flow, removed 10 redundant places. [2024-01-27 15:49:15,545 INFO L231 Difference]: Finished difference. Result has 468 places, 1279 transitions, 20843 flow [2024-01-27 15:49:15,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=10073, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=517, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=139, PETRI_FLOW=20843, PETRI_PLACES=468, PETRI_TRANSITIONS=1279} [2024-01-27 15:49:15,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 438 predicate places. [2024-01-27 15:49:15,546 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1279 transitions, 20843 flow [2024-01-27 15:49:15,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.5) internal successors, (297), 54 states have internal predecessors, (297), 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) [2024-01-27 15:49:15,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:15,547 INFO L208 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, 1] [2024-01-27 15:49:15,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:49:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-01-27 15:49:15,756 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:49:15,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -287663325, now seen corresponding path program 4 times [2024-01-27 15:49:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218812035] [2024-01-27 15:49:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:15,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218812035] [2024-01-27 15:49:16,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218812035] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:16,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962174453] [2024-01-27 15:49:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:49:16,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:16,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:16,920 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) [2024-01-27 15:49:16,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:49:17,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:49:17,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:17,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2024-01-27 15:49:17,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:18,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:18,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:18,747 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 [2024-01-27 15:49:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:19,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962174453] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:19,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:19,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-01-27 15:49:19,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500511961] [2024-01-27 15:49:19,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:19,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-27 15:49:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-27 15:49:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2445, Unknown=0, NotChecked=0, Total=2652 [2024-01-27 15:49:19,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:49:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1279 transitions, 20843 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:49:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:49:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:35,178 INFO L124 PetriNetUnfolderBase]: 7309/14002 cut-off events. [2024-01-27 15:49:35,178 INFO L125 PetriNetUnfolderBase]: For 238017/238017 co-relation queries the response was YES. [2024-01-27 15:49:35,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92514 conditions, 14002 events. 7309/14002 cut-off events. For 238017/238017 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 111646 event pairs, 630 based on Foata normal form. 4/14006 useless extension candidates. Maximal degree in co-relation 92394. Up to 6642 conditions per place. [2024-01-27 15:49:35,361 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 643 selfloop transitions, 1069 changer transitions 12/1726 dead transitions. [2024-01-27 15:49:35,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 1726 transitions, 28650 flow [2024-01-27 15:49:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-01-27 15:49:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2024-01-27 15:49:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 712 transitions. [2024-01-27 15:49:35,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3207207207207207 [2024-01-27 15:49:35,363 INFO L175 Difference]: Start difference. First operand has 468 places, 1279 transitions, 20843 flow. Second operand 74 states and 712 transitions. [2024-01-27 15:49:35,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 1726 transitions, 28650 flow [2024-01-27 15:49:37,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 1726 transitions, 27196 flow, removed 678 selfloop flow, removed 22 redundant places. [2024-01-27 15:49:37,844 INFO L231 Difference]: Finished difference. Result has 529 places, 1412 transitions, 25227 flow [2024-01-27 15:49:37,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=19541, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=948, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=25227, PETRI_PLACES=529, PETRI_TRANSITIONS=1412} [2024-01-27 15:49:37,846 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 499 predicate places. [2024-01-27 15:49:37,846 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 1412 transitions, 25227 flow [2024-01-27 15:49:37,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:49:37,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:37,846 INFO L208 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, 1] [2024-01-27 15:49:37,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:38,047 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:49:38,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1230029145, now seen corresponding path program 5 times [2024-01-27 15:49:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:38,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809839464] [2024-01-27 15:49:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:39,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809839464] [2024-01-27 15:49:39,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809839464] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:39,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897219666] [2024-01-27 15:49:39,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:49:39,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:39,091 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) [2024-01-27 15:49:39,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:49:39,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:49:39,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:49:39,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 15:49:39,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:40,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:41,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:49:41,351 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 32 treesize of output 24 [2024-01-27 15:49:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:42,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897219666] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:49:42,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:49:42,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-01-27 15:49:42,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161903414] [2024-01-27 15:49:42,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:49:42,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-01-27 15:49:42,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-01-27 15:49:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2341, Unknown=0, NotChecked=0, Total=2550 [2024-01-27 15:49:42,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:49:42,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 1412 transitions, 25227 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:49:42,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:42,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:49:42,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:55,440 INFO L124 PetriNetUnfolderBase]: 7527/14521 cut-off events. [2024-01-27 15:49:55,440 INFO L125 PetriNetUnfolderBase]: For 305981/305981 co-relation queries the response was YES. [2024-01-27 15:49:55,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104347 conditions, 14521 events. 7527/14521 cut-off events. For 305981/305981 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 117692 event pairs, 775 based on Foata normal form. 6/14523 useless extension candidates. Maximal degree in co-relation 104218. Up to 7493 conditions per place. [2024-01-27 15:49:55,622 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 718 selfloop transitions, 1060 changer transitions 31/1811 dead transitions. [2024-01-27 15:49:55,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 1811 transitions, 33036 flow [2024-01-27 15:49:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-27 15:49:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-27 15:49:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 696 transitions. [2024-01-27 15:49:55,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30933333333333335 [2024-01-27 15:49:55,624 INFO L175 Difference]: Start difference. First operand has 529 places, 1412 transitions, 25227 flow. Second operand 75 states and 696 transitions. [2024-01-27 15:49:55,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 1811 transitions, 33036 flow [2024-01-27 15:49:59,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1811 transitions, 32310 flow, removed 177 selfloop flow, removed 31 redundant places. [2024-01-27 15:49:59,297 INFO L231 Difference]: Finished difference. Result has 589 places, 1523 transitions, 30279 flow [2024-01-27 15:49:59,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=24559, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=962, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=30279, PETRI_PLACES=589, PETRI_TRANSITIONS=1523} [2024-01-27 15:49:59,298 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 559 predicate places. [2024-01-27 15:49:59,298 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1523 transitions, 30279 flow [2024-01-27 15:49:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:49:59,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:59,299 INFO L208 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, 1] [2024-01-27 15:49:59,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:49:59,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-27 15:49:59,500 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:49:59,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash 414510111, now seen corresponding path program 6 times [2024-01-27 15:49:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:59,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334685454] [2024-01-27 15:49:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:00,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:00,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334685454] [2024-01-27 15:50:00,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334685454] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:00,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533470073] [2024-01-27 15:50:00,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:50:00,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:00,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:00,546 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:00,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:50:00,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:50:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:00,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:50:00,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:01,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-27 15:50:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:01,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:02,634 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:02,634 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 51 treesize of output 43 [2024-01-27 15:50:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533470073] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:03,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 51 [2024-01-27 15:50:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907732474] [2024-01-27 15:50:03,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-27 15:50:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-27 15:50:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2024-01-27 15:50:03,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:50:03,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1523 transitions, 30279 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:50:03,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:03,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:50:03,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:26,881 INFO L124 PetriNetUnfolderBase]: 7748/15031 cut-off events. [2024-01-27 15:50:26,881 INFO L125 PetriNetUnfolderBase]: For 398187/398187 co-relation queries the response was YES. [2024-01-27 15:50:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118215 conditions, 15031 events. 7748/15031 cut-off events. For 398187/398187 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 123777 event pairs, 886 based on Foata normal form. 8/15035 useless extension candidates. Maximal degree in co-relation 118069. Up to 7401 conditions per place. [2024-01-27 15:50:27,060 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 838 selfloop transitions, 1183 changer transitions 92/2115 dead transitions. [2024-01-27 15:50:27,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2115 transitions, 42817 flow [2024-01-27 15:50:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-01-27 15:50:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-01-27 15:50:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 916 transitions. [2024-01-27 15:50:27,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3023102310231023 [2024-01-27 15:50:27,062 INFO L175 Difference]: Start difference. First operand has 589 places, 1523 transitions, 30279 flow. Second operand 101 states and 916 transitions. [2024-01-27 15:50:27,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2115 transitions, 42817 flow [2024-01-27 15:50:31,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2115 transitions, 42025 flow, removed 189 selfloop flow, removed 37 redundant places. [2024-01-27 15:50:31,879 INFO L231 Difference]: Finished difference. Result has 675 places, 1781 transitions, 39638 flow [2024-01-27 15:50:31,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=29646, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=934, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=39638, PETRI_PLACES=675, PETRI_TRANSITIONS=1781} [2024-01-27 15:50:31,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 645 predicate places. [2024-01-27 15:50:31,881 INFO L495 AbstractCegarLoop]: Abstraction has has 675 places, 1781 transitions, 39638 flow [2024-01-27 15:50:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:50:31,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:31,882 INFO L208 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, 1] [2024-01-27 15:50:31,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:32,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-01-27 15:50:32,100 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:50:32,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1739366363, now seen corresponding path program 7 times [2024-01-27 15:50:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284481817] [2024-01-27 15:50:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:32,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:33,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284481817] [2024-01-27 15:50:33,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284481817] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576809099] [2024-01-27 15:50:33,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:50:33,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:33,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:33,049 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:33,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:50:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:33,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:50:33,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:34,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:35,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:35,006 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 51 treesize of output 43 [2024-01-27 15:50:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:35,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576809099] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:35,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:35,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-01-27 15:50:35,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271467317] [2024-01-27 15:50:35,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:35,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-01-27 15:50:35,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-01-27 15:50:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2310, Unknown=0, NotChecked=0, Total=2550 [2024-01-27 15:50:35,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:50:35,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 675 places, 1781 transitions, 39638 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:50:35,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:35,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:50:35,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:48,362 INFO L124 PetriNetUnfolderBase]: 7646/14801 cut-off events. [2024-01-27 15:50:48,362 INFO L125 PetriNetUnfolderBase]: For 501567/501567 co-relation queries the response was YES. [2024-01-27 15:50:48,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127846 conditions, 14801 events. 7646/14801 cut-off events. For 501567/501567 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 120556 event pairs, 851 based on Foata normal form. 6/14807 useless extension candidates. Maximal degree in co-relation 127678. Up to 8197 conditions per place. [2024-01-27 15:50:48,557 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 849 selfloop transitions, 1108 changer transitions 38/1997 dead transitions. [2024-01-27 15:50:48,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 1997 transitions, 45661 flow [2024-01-27 15:50:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-01-27 15:50:48,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-01-27 15:50:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 524 transitions. [2024-01-27 15:50:48,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119047619047619 [2024-01-27 15:50:48,560 INFO L175 Difference]: Start difference. First operand has 675 places, 1781 transitions, 39638 flow. Second operand 56 states and 524 transitions. [2024-01-27 15:50:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 1997 transitions, 45661 flow [2024-01-27 15:50:54,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 675 places, 1997 transitions, 44967 flow, removed 234 selfloop flow, removed 39 redundant places. [2024-01-27 15:50:54,688 INFO L231 Difference]: Finished difference. Result has 682 places, 1780 transitions, 42876 flow [2024-01-27 15:50:54,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=38987, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=42876, PETRI_PLACES=682, PETRI_TRANSITIONS=1780} [2024-01-27 15:50:54,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 652 predicate places. [2024-01-27 15:50:54,690 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 1780 transitions, 42876 flow [2024-01-27 15:50:54,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:50:54,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:54,690 INFO L208 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, 1] [2024-01-27 15:50:54,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:50:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-01-27 15:50:54,904 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:50:54,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 518709595, now seen corresponding path program 8 times [2024-01-27 15:50:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76045164] [2024-01-27 15:50:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:55,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76045164] [2024-01-27 15:50:55,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76045164] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:50:55,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3925768] [2024-01-27 15:50:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:50:55,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:50:55,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:50:55,892 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:50:55,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:50:56,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:50:56,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:50:56,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2024-01-27 15:50:56,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:50:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:56,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:50:57,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:50:57,392 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 [2024-01-27 15:50:58,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:58,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3925768] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:50:58,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:50:58,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 49 [2024-01-27 15:50:58,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447538303] [2024-01-27 15:50:58,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:50:58,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-01-27 15:50:58,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:58,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-01-27 15:50:58,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2024-01-27 15:50:58,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:50:58,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 1780 transitions, 42876 flow. Second operand has 50 states, 50 states have (on average 5.6) internal successors, (280), 50 states have internal predecessors, (280), 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) [2024-01-27 15:50:58,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:58,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:50:58,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:10,679 INFO L124 PetriNetUnfolderBase]: 7684/14886 cut-off events. [2024-01-27 15:51:10,679 INFO L125 PetriNetUnfolderBase]: For 603762/603762 co-relation queries the response was YES. [2024-01-27 15:51:10,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137601 conditions, 14886 events. 7684/14886 cut-off events. For 603762/603762 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 122097 event pairs, 851 based on Foata normal form. 5/14891 useless extension candidates. Maximal degree in co-relation 137429. Up to 8089 conditions per place. [2024-01-27 15:51:10,872 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 878 selfloop transitions, 1099 changer transitions 23/2002 dead transitions. [2024-01-27 15:51:10,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 2002 transitions, 49115 flow [2024-01-27 15:51:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-01-27 15:51:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-01-27 15:51:10,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 507 transitions. [2024-01-27 15:51:10,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31886792452830187 [2024-01-27 15:51:10,873 INFO L175 Difference]: Start difference. First operand has 682 places, 1780 transitions, 42876 flow. Second operand 53 states and 507 transitions. [2024-01-27 15:51:10,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 2002 transitions, 49115 flow [2024-01-27 15:51:17,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 2002 transitions, 48722 flow, removed 51 selfloop flow, removed 44 redundant places. [2024-01-27 15:51:17,670 INFO L231 Difference]: Finished difference. Result has 680 places, 1791 transitions, 46263 flow [2024-01-27 15:51:17,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=42501, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1780, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=46263, PETRI_PLACES=680, PETRI_TRANSITIONS=1791} [2024-01-27 15:51:17,672 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 650 predicate places. [2024-01-27 15:51:17,672 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1791 transitions, 46263 flow [2024-01-27 15:51:17,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.6) internal successors, (280), 50 states have internal predecessors, (280), 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) [2024-01-27 15:51:17,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:17,673 INFO L208 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, 1] [2024-01-27 15:51:17,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-27 15:51:17,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:51:17,873 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:51:17,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:17,874 INFO L85 PathProgramCache]: Analyzing trace with hash -259668765, now seen corresponding path program 9 times [2024-01-27 15:51:17,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:17,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487422050] [2024-01-27 15:51:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:17,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:18,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487422050] [2024-01-27 15:51:18,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487422050] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:18,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713718088] [2024-01-27 15:51:18,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:51:18,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:18,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:18,850 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:18,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:51:18,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:51:18,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:18,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2024-01-27 15:51:18,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:19,711 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-01-27 15:51:19,711 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 23 treesize of output 10 [2024-01-27 15:51:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:20,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:20,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:51:20,932 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 [2024-01-27 15:51:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713718088] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:21,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 51 [2024-01-27 15:51:21,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414906165] [2024-01-27 15:51:21,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-01-27 15:51:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-01-27 15:51:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2441, Unknown=0, NotChecked=0, Total=2652 [2024-01-27 15:51:21,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:51:21,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1791 transitions, 46263 flow. Second operand has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:51:21,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:21,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:51:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:51:41,683 INFO L124 PetriNetUnfolderBase]: 7948/15465 cut-off events. [2024-01-27 15:51:41,683 INFO L125 PetriNetUnfolderBase]: For 716294/716294 co-relation queries the response was YES. [2024-01-27 15:51:41,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150671 conditions, 15465 events. 7948/15465 cut-off events. For 716294/716294 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 127862 event pairs, 937 based on Foata normal form. 4/15469 useless extension candidates. Maximal degree in co-relation 150503. Up to 8017 conditions per place. [2024-01-27 15:51:41,873 INFO L140 encePairwiseOnDemand]: 14/30 looper letters, 789 selfloop transitions, 1362 changer transitions 12/2165 dead transitions. [2024-01-27 15:51:41,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 746 places, 2165 transitions, 56200 flow [2024-01-27 15:51:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-01-27 15:51:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2024-01-27 15:51:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 672 transitions. [2024-01-27 15:51:41,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3111111111111111 [2024-01-27 15:51:41,875 INFO L175 Difference]: Start difference. First operand has 680 places, 1791 transitions, 46263 flow. Second operand 72 states and 672 transitions. [2024-01-27 15:51:41,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 746 places, 2165 transitions, 56200 flow [2024-01-27 15:51:49,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 706 places, 2165 transitions, 55537 flow, removed 29 selfloop flow, removed 40 redundant places. [2024-01-27 15:51:49,590 INFO L231 Difference]: Finished difference. Result has 728 places, 1936 transitions, 54274 flow [2024-01-27 15:51:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=45663, PETRI_DIFFERENCE_MINUEND_PLACES=635, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=54274, PETRI_PLACES=728, PETRI_TRANSITIONS=1936} [2024-01-27 15:51:49,591 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 698 predicate places. [2024-01-27 15:51:49,591 INFO L495 AbstractCegarLoop]: Abstraction has has 728 places, 1936 transitions, 54274 flow [2024-01-27 15:51:49,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.5576923076923075) internal successors, (289), 52 states have internal predecessors, (289), 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) [2024-01-27 15:51:49,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:51:49,591 INFO L208 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, 1] [2024-01-27 15:51:49,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-01-27 15:51:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:49,792 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:51:49,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:51:49,792 INFO L85 PathProgramCache]: Analyzing trace with hash -790960461, now seen corresponding path program 10 times [2024-01-27 15:51:49,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:51:49,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474226442] [2024-01-27 15:51:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:51:49,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:51:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:51:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:50,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:51:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474226442] [2024-01-27 15:51:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474226442] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:51:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64954628] [2024-01-27 15:51:50,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:51:50,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:51:50,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:51:50,697 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:51:50,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:51:50,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:51:50,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:51:50,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:51:50,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:51:51,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-01-27 15:51:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:51,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:51:52,570 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:51:52,571 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 51 treesize of output 43 [2024-01-27 15:51:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:51:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64954628] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:51:53,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:51:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 50 [2024-01-27 15:51:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789535067] [2024-01-27 15:51:53,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:51:53,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-01-27 15:51:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:51:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-01-27 15:51:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2024-01-27 15:51:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:51:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 728 places, 1936 transitions, 54274 flow. Second operand has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:51:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:51:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:51:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:09,957 INFO L124 PetriNetUnfolderBase]: 8196/15998 cut-off events. [2024-01-27 15:52:09,957 INFO L125 PetriNetUnfolderBase]: For 860648/860648 co-relation queries the response was YES. [2024-01-27 15:52:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166049 conditions, 15998 events. 8196/15998 cut-off events. For 860648/860648 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 134419 event pairs, 1032 based on Foata normal form. 5/16003 useless extension candidates. Maximal degree in co-relation 165862. Up to 9145 conditions per place. [2024-01-27 15:52:10,214 INFO L140 encePairwiseOnDemand]: 13/30 looper letters, 986 selfloop transitions, 1208 changer transitions 64/2260 dead transitions. [2024-01-27 15:52:10,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 2260 transitions, 63629 flow [2024-01-27 15:52:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-01-27 15:52:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-01-27 15:52:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 610 transitions. [2024-01-27 15:52:10,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3128205128205128 [2024-01-27 15:52:10,216 INFO L175 Difference]: Start difference. First operand has 728 places, 1936 transitions, 54274 flow. Second operand 65 states and 610 transitions. [2024-01-27 15:52:10,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 2260 transitions, 63629 flow [2024-01-27 15:52:20,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 756 places, 2260 transitions, 62824 flow, removed 116 selfloop flow, removed 34 redundant places. [2024-01-27 15:52:20,281 INFO L231 Difference]: Finished difference. Result has 782 places, 2025 transitions, 60561 flow [2024-01-27 15:52:20,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=53507, PETRI_DIFFERENCE_MINUEND_PLACES=692, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=60561, PETRI_PLACES=782, PETRI_TRANSITIONS=2025} [2024-01-27 15:52:20,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 752 predicate places. [2024-01-27 15:52:20,283 INFO L495 AbstractCegarLoop]: Abstraction has has 782 places, 2025 transitions, 60561 flow [2024-01-27 15:52:20,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.588235294117647) internal successors, (285), 51 states have internal predecessors, (285), 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) [2024-01-27 15:52:20,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:52:20,284 INFO L208 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, 1] [2024-01-27 15:52:20,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-27 15:52:20,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:52:20,489 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:52:20,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:52:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 99520569, now seen corresponding path program 11 times [2024-01-27 15:52:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:52:20,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884611936] [2024-01-27 15:52:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:52:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:52:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:52:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:21,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:52:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884611936] [2024-01-27 15:52:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884611936] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:52:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514021365] [2024-01-27 15:52:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:52:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:52:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:52:21,444 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:52:21,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:52:21,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:52:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:52:21,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2024-01-27 15:52:21,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:52:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:22,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:52:23,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:52:23,440 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 51 treesize of output 43 [2024-01-27 15:52:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:52:24,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514021365] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:52:24,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:52:24,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 49 [2024-01-27 15:52:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831669171] [2024-01-27 15:52:24,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:52:24,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-01-27 15:52:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:52:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-01-27 15:52:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2232, Unknown=0, NotChecked=0, Total=2450 [2024-01-27 15:52:24,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 30 [2024-01-27 15:52:24,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 782 places, 2025 transitions, 60561 flow. Second operand has 50 states, 50 states have (on average 5.62) internal successors, (281), 50 states have internal predecessors, (281), 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) [2024-01-27 15:52:24,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:52:24,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 30 [2024-01-27 15:52:24,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:52:40,502 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 []