./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-mult-4.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-mult-4.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 b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:49:34,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:49:34,829 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:49:34,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:49:34,832 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:49:34,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:49:34,861 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:49:34,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:49:34,861 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:49:34,862 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:49:34,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:49:34,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:49:34,862 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:49:34,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:49:34,863 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:49:34,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:49:34,863 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:49:34,864 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:49:34,864 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:49:34,864 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:49:34,864 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:49:34,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:49:34,867 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:49:34,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:49:34,868 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:49:34,868 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:49:34,868 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:49:34,868 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:49:34,869 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:49:34,869 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:49:34,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:49:34,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:49:34,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:49:34,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:49:34,871 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:49:34,872 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:49:34,872 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:49:34,872 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:49:34,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2024-01-27 15:49:35,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:49:35,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:49:35,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:49:35,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:49:35,129 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:49:35,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-01-27 15:49:36,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:49:36,476 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:49:36,478 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2024-01-27 15:49:36,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22245b32f/4b2615d9cbd840c5bcd5dc5f01ea7271/FLAG196171283 [2024-01-27 15:49:36,496 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22245b32f/4b2615d9cbd840c5bcd5dc5f01ea7271 [2024-01-27 15:49:36,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:49:36,502 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:49:36,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:49:36,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:49:36,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:49:36,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7aa22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36, skipping insertion in model container [2024-01-27 15:49:36,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,540 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:49:36,714 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-mult-4.wvr.c[2664,2677] [2024-01-27 15:49:36,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:49:36,727 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:49:36,755 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-mult-4.wvr.c[2664,2677] [2024-01-27 15:49:36,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:49:36,772 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:49:36,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36 WrapperNode [2024-01-27 15:49:36,773 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:49:36,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:49:36,775 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:49:36,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:49:36,786 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,793 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,813 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2024-01-27 15:49:36,814 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:49:36,815 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:49:36,815 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:49:36,815 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:49:36,826 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,829 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,844 INFO L175 MemorySlicer]: Split 10 memory accesses to 5 slices as follows [2, 2, 2, 2, 2]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-01-27 15:49:36,844 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,845 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,854 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,859 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:49:36,860 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:49:36,860 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:49:36,860 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:49:36,861 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (1/1) ... [2024-01-27 15:49:36,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:49:36,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:36,911 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 15:49:36,914 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 15:49:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:49:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:49:36,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:49:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:49:36,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:49:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-01-27 15:49:36,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-01-27 15:49:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-01-27 15:49:36,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-01-27 15:49:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:49:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:49:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:49:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:49:36,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:49:36,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:49:36,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:49:36,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:49:36,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-27 15:49:36,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:49:36,962 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 15:49:37,076 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:49:37,077 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:49:37,323 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:49:37,323 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:49:37,465 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:49:37,485 INFO L320 CfgBuilder]: Removed 4 assume(true) statements. [2024-01-27 15:49:37,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:49:37 BoogieIcfgContainer [2024-01-27 15:49:37,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:49:37,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:49:37,489 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:49:37,491 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:49:37,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:49:36" (1/3) ... [2024-01-27 15:49:37,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7ad260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:49:37, skipping insertion in model container [2024-01-27 15:49:37,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:49:36" (2/3) ... [2024-01-27 15:49:37,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7ad260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:49:37, skipping insertion in model container [2024-01-27 15:49:37,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:49:37" (3/3) ... [2024-01-27 15:49:37,495 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-01-27 15:49:37,517 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:49:37,525 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:49:37,526 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:49:37,526 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:49:37,630 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-01-27 15:49:37,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 43 transitions, 114 flow [2024-01-27 15:49:37,699 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2024-01-27 15:49:37,699 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:49:37,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 39 events. 4/39 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-01-27 15:49:37,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 43 transitions, 114 flow [2024-01-27 15:49:37,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 100 flow [2024-01-27 15:49:37,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:49:37,716 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;@528fd7a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:49:37,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-01-27 15:49:37,726 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:49:37,726 INFO L124 PetriNetUnfolderBase]: 4/37 cut-off events. [2024-01-27 15:49:37,726 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-01-27 15:49:37,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:37,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:37,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:37,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:37,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1312954270, now seen corresponding path program 1 times [2024-01-27 15:49:37,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420306249] [2024-01-27 15:49:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:38,099 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 15:49:38,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:38,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420306249] [2024-01-27 15:49:38,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420306249] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:38,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:38,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:49:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029048658] [2024-01-27 15:49:38,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:49:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:38,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:49:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:49:38,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-01-27 15:49:38,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 15:49:38,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:38,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-01-27 15:49:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:38,675 INFO L124 PetriNetUnfolderBase]: 3350/4633 cut-off events. [2024-01-27 15:49:38,675 INFO L125 PetriNetUnfolderBase]: For 323/323 co-relation queries the response was YES. [2024-01-27 15:49:38,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 4633 events. 3350/4633 cut-off events. For 323/323 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20192 event pairs, 860 based on Foata normal form. 147/4770 useless extension candidates. Maximal degree in co-relation 7596. Up to 3527 conditions per place. [2024-01-27 15:49:38,702 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 51 selfloop transitions, 3 changer transitions 3/62 dead transitions. [2024-01-27 15:49:38,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 283 flow [2024-01-27 15:49:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:49:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:49:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-01-27 15:49:38,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-01-27 15:49:38,714 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 100 flow. Second operand 3 states and 87 transitions. [2024-01-27 15:49:38,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 283 flow [2024-01-27 15:49:38,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 253 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-01-27 15:49:38,726 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-01-27 15:49:38,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-01-27 15:49:38,730 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -5 predicate places. [2024-01-27 15:49:38,731 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-01-27 15:49:38,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 15:49:38,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:38,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:38,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:49:38,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:38,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:38,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1636013014, now seen corresponding path program 1 times [2024-01-27 15:49:38,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:38,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363610294] [2024-01-27 15:49:38,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:38,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:38,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363610294] [2024-01-27 15:49:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363610294] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:38,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:38,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:49:38,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967134479] [2024-01-27 15:49:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:38,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:38,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:38,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:38,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:38,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:38,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:39,928 INFO L124 PetriNetUnfolderBase]: 12483/16712 cut-off events. [2024-01-27 15:49:39,929 INFO L125 PetriNetUnfolderBase]: For 989/989 co-relation queries the response was YES. [2024-01-27 15:49:39,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35425 conditions, 16712 events. 12483/16712 cut-off events. For 989/989 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 84880 event pairs, 4741 based on Foata normal form. 0/13201 useless extension candidates. Maximal degree in co-relation 10119. Up to 9345 conditions per place. [2024-01-27 15:49:40,010 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 84 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-01-27 15:49:40,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 430 flow [2024-01-27 15:49:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:40,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-27 15:49:40,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-01-27 15:49:40,015 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 5 states and 132 transitions. [2024-01-27 15:49:40,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 430 flow [2024-01-27 15:49:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 99 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:49:40,020 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 171 flow [2024-01-27 15:49:40,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-01-27 15:49:40,021 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2024-01-27 15:49:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 171 flow [2024-01-27 15:49:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:40,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:40,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:49:40,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:40,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:40,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1645224102, now seen corresponding path program 2 times [2024-01-27 15:49:40,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:40,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061773234] [2024-01-27 15:49:40,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:40,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061773234] [2024-01-27 15:49:40,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061773234] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:40,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:40,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415383356] [2024-01-27 15:49:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:40,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:49:40,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:49:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:49:40,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:40,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:40,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:40,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:40,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:41,658 INFO L124 PetriNetUnfolderBase]: 18418/24773 cut-off events. [2024-01-27 15:49:41,659 INFO L125 PetriNetUnfolderBase]: For 10776/10854 co-relation queries the response was YES. [2024-01-27 15:49:41,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64826 conditions, 24773 events. 18418/24773 cut-off events. For 10776/10854 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 135227 event pairs, 3248 based on Foata normal form. 714/25067 useless extension candidates. Maximal degree in co-relation 37336. Up to 13675 conditions per place. [2024-01-27 15:49:41,792 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 91 selfloop transitions, 8 changer transitions 3/107 dead transitions. [2024-01-27 15:49:41,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 107 transitions, 566 flow [2024-01-27 15:49:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:49:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:49:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-01-27 15:49:41,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6569767441860465 [2024-01-27 15:49:41,796 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 171 flow. Second operand 4 states and 113 transitions. [2024-01-27 15:49:41,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 107 transitions, 566 flow [2024-01-27 15:49:41,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 107 transitions, 566 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:49:41,808 INFO L231 Difference]: Finished difference. Result has 54 places, 57 transitions, 257 flow [2024-01-27 15:49:41,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=54, PETRI_TRANSITIONS=57} [2024-01-27 15:49:41,810 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-01-27 15:49:41,810 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 57 transitions, 257 flow [2024-01-27 15:49:41,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:41,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:41,811 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, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:41,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:49:41,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:41,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1930970174, now seen corresponding path program 3 times [2024-01-27 15:49:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606642914] [2024-01-27 15:49:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:41,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:42,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:42,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606642914] [2024-01-27 15:49:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606642914] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:42,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:42,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:49:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352081011] [2024-01-27 15:49:42,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:42,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:42,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 57 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:42,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:42,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:42,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:43,915 INFO L124 PetriNetUnfolderBase]: 24182/32187 cut-off events. [2024-01-27 15:49:43,915 INFO L125 PetriNetUnfolderBase]: For 29408/29478 co-relation queries the response was YES. [2024-01-27 15:49:44,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95014 conditions, 32187 events. 24182/32187 cut-off events. For 29408/29478 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 174884 event pairs, 6854 based on Foata normal form. 198/31764 useless extension candidates. Maximal degree in co-relation 36900. Up to 13097 conditions per place. [2024-01-27 15:49:44,143 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 101 selfloop transitions, 18 changer transitions 0/124 dead transitions. [2024-01-27 15:49:44,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 124 transitions, 755 flow [2024-01-27 15:49:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-27 15:49:44,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-01-27 15:49:44,377 INFO L175 Difference]: Start difference. First operand has 54 places, 57 transitions, 257 flow. Second operand 5 states and 132 transitions. [2024-01-27 15:49:44,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 124 transitions, 755 flow [2024-01-27 15:49:44,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 124 transitions, 755 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:49:44,412 INFO L231 Difference]: Finished difference. Result has 60 places, 67 transitions, 388 flow [2024-01-27 15:49:44,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=60, PETRI_TRANSITIONS=67} [2024-01-27 15:49:44,413 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2024-01-27 15:49:44,414 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 67 transitions, 388 flow [2024-01-27 15:49:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:44,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:44,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:44,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:49:44,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:44,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1551907320, now seen corresponding path program 4 times [2024-01-27 15:49:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:44,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902331607] [2024-01-27 15:49:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:44,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:44,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:44,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902331607] [2024-01-27 15:49:44,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902331607] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:44,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93417582] [2024-01-27 15:49:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:44,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:49:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:49:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:49:44,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:44,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 67 transitions, 388 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:44,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:44,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:44,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:46,574 INFO L124 PetriNetUnfolderBase]: 24522/32875 cut-off events. [2024-01-27 15:49:46,575 INFO L125 PetriNetUnfolderBase]: For 59754/59830 co-relation queries the response was YES. [2024-01-27 15:49:46,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108062 conditions, 32875 events. 24522/32875 cut-off events. For 59754/59830 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 181399 event pairs, 7282 based on Foata normal form. 412/32668 useless extension candidates. Maximal degree in co-relation 40658. Up to 16730 conditions per place. [2024-01-27 15:49:46,963 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 97 selfloop transitions, 13 changer transitions 0/115 dead transitions. [2024-01-27 15:49:46,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 115 transitions, 783 flow [2024-01-27 15:49:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:49:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:49:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-01-27 15:49:46,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6569767441860465 [2024-01-27 15:49:46,965 INFO L175 Difference]: Start difference. First operand has 60 places, 67 transitions, 388 flow. Second operand 4 states and 113 transitions. [2024-01-27 15:49:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 115 transitions, 783 flow [2024-01-27 15:49:47,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 769 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-01-27 15:49:47,020 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 415 flow [2024-01-27 15:49:47,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2024-01-27 15:49:47,021 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2024-01-27 15:49:47,022 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 415 flow [2024-01-27 15:49:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:47,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:47,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:49:47,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:47,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2047129078, now seen corresponding path program 1 times [2024-01-27 15:49:47,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:47,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743687420] [2024-01-27 15:49:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:47,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:47,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743687420] [2024-01-27 15:49:47,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743687420] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:47,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:47,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:49:47,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716436794] [2024-01-27 15:49:47,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:47,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:47,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:47,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:47,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:47,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 415 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:47,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:47,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:47,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:49,323 INFO L124 PetriNetUnfolderBase]: 27273/36835 cut-off events. [2024-01-27 15:49:49,324 INFO L125 PetriNetUnfolderBase]: For 92797/92819 co-relation queries the response was YES. [2024-01-27 15:49:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123291 conditions, 36835 events. 27273/36835 cut-off events. For 92797/92819 co-relation queries the response was YES. Maximal size of possible extension queue 1335. Compared 209205 event pairs, 8279 based on Foata normal form. 1000/36943 useless extension candidates. Maximal degree in co-relation 45143. Up to 17649 conditions per place. [2024-01-27 15:49:49,536 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 98 selfloop transitions, 12 changer transitions 19/134 dead transitions. [2024-01-27 15:49:49,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 134 transitions, 968 flow [2024-01-27 15:49:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:49,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:49,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-01-27 15:49:49,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.641860465116279 [2024-01-27 15:49:49,538 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 415 flow. Second operand 5 states and 138 transitions. [2024-01-27 15:49:49,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 134 transitions, 968 flow [2024-01-27 15:49:49,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 134 transitions, 881 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-01-27 15:49:49,580 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 419 flow [2024-01-27 15:49:49,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=419, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-01-27 15:49:49,580 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 19 predicate places. [2024-01-27 15:49:49,581 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 419 flow [2024-01-27 15:49:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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 15:49:49,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:49,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:49,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:49:49,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:49,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash -984612048, now seen corresponding path program 5 times [2024-01-27 15:49:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:49,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459103264] [2024-01-27 15:49:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:49,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:49,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:49,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459103264] [2024-01-27 15:49:49,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459103264] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:49,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:49,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:49:49,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844523432] [2024-01-27 15:49:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:49,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:49:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:49:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:49:49,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:49,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 419 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:49,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:49,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:49,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:51,543 INFO L124 PetriNetUnfolderBase]: 25686/34776 cut-off events. [2024-01-27 15:49:51,543 INFO L125 PetriNetUnfolderBase]: For 79460/79532 co-relation queries the response was YES. [2024-01-27 15:49:51,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120246 conditions, 34776 events. 25686/34776 cut-off events. For 79460/79532 co-relation queries the response was YES. Maximal size of possible extension queue 1273. Compared 196671 event pairs, 8381 based on Foata normal form. 694/34708 useless extension candidates. Maximal degree in co-relation 48895. Up to 17191 conditions per place. [2024-01-27 15:49:51,887 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 85 selfloop transitions, 18 changer transitions 5/113 dead transitions. [2024-01-27 15:49:51,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 850 flow [2024-01-27 15:49:51,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:49:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:49:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-01-27 15:49:51,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2024-01-27 15:49:51,888 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 419 flow. Second operand 4 states and 109 transitions. [2024-01-27 15:49:51,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 850 flow [2024-01-27 15:49:51,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 113 transitions, 811 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:51,999 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 459 flow [2024-01-27 15:49:51,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-01-27 15:49:52,001 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2024-01-27 15:49:52,001 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 459 flow [2024-01-27 15:49:52,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:52,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:52,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:52,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-01-27 15:49:52,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:52,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:52,003 INFO L85 PathProgramCache]: Analyzing trace with hash -275063773, now seen corresponding path program 1 times [2024-01-27 15:49:52,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:52,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374097079] [2024-01-27 15:49:52,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:52,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:52,141 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 15:49:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374097079] [2024-01-27 15:49:52,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374097079] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:52,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911130269] [2024-01-27 15:49:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:52,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:52,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:49:52,145 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 15:49:52,150 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 15:49:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:52,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2024-01-27 15:49:52,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:49:52,362 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 15:49:52,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:49:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:52,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911130269] provided 1 perfect and 1 imperfect interpolant sequences [2024-01-27 15:49:52,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-01-27 15:49:52,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-01-27 15:49:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671273963] [2024-01-27 15:49:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:49:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:52,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:49:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:49:52,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:52,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 459 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:49:52,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:52,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:52,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:54,583 INFO L124 PetriNetUnfolderBase]: 27458/37461 cut-off events. [2024-01-27 15:49:54,584 INFO L125 PetriNetUnfolderBase]: For 91978/92004 co-relation queries the response was YES. [2024-01-27 15:49:54,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136066 conditions, 37461 events. 27458/37461 cut-off events. For 91978/92004 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 218809 event pairs, 3995 based on Foata normal form. 1016/37975 useless extension candidates. Maximal degree in co-relation 55938. Up to 18467 conditions per place. [2024-01-27 15:49:54,799 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 104 selfloop transitions, 11 changer transitions 5/125 dead transitions. [2024-01-27 15:49:54,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 125 transitions, 1058 flow [2024-01-27 15:49:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:49:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:49:54,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-01-27 15:49:54,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6162790697674418 [2024-01-27 15:49:54,802 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 459 flow. Second operand 4 states and 106 transitions. [2024-01-27 15:49:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 125 transitions, 1058 flow [2024-01-27 15:49:54,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 125 transitions, 1026 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:54,860 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 505 flow [2024-01-27 15:49:54,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=505, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-01-27 15:49:54,861 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 20 predicate places. [2024-01-27 15:49:54,861 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 505 flow [2024-01-27 15:49:54,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 15:49:54,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:54,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:54,888 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 15:49:55,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:49:55,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:55,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:55,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1103270487, now seen corresponding path program 2 times [2024-01-27 15:49:55,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:55,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682216325] [2024-01-27 15:49:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:55,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:49:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682216325] [2024-01-27 15:49:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682216325] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:55,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:55,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:49:55,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054329395] [2024-01-27 15:49:55,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:55,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:55,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:55,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:55,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:55,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 505 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:55,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:55,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:55,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:58,044 INFO L124 PetriNetUnfolderBase]: 33890/45486 cut-off events. [2024-01-27 15:49:58,044 INFO L125 PetriNetUnfolderBase]: For 150538/150554 co-relation queries the response was YES. [2024-01-27 15:49:58,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178944 conditions, 45486 events. 33890/45486 cut-off events. For 150538/150554 co-relation queries the response was YES. Maximal size of possible extension queue 1641. Compared 261899 event pairs, 9555 based on Foata normal form. 200/44749 useless extension candidates. Maximal degree in co-relation 72222. Up to 26218 conditions per place. [2024-01-27 15:49:58,303 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 135 selfloop transitions, 21 changer transitions 4/165 dead transitions. [2024-01-27 15:49:58,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 165 transitions, 1580 flow [2024-01-27 15:49:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:49:58,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:49:58,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-01-27 15:49:58,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-01-27 15:49:58,305 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 505 flow. Second operand 5 states and 129 transitions. [2024-01-27 15:49:58,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 165 transitions, 1580 flow [2024-01-27 15:49:58,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 165 transitions, 1544 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:49:58,352 INFO L231 Difference]: Finished difference. Result has 72 places, 83 transitions, 679 flow [2024-01-27 15:49:58,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=679, PETRI_PLACES=72, PETRI_TRANSITIONS=83} [2024-01-27 15:49:58,356 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 25 predicate places. [2024-01-27 15:49:58,356 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 83 transitions, 679 flow [2024-01-27 15:49:58,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:58,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:49:58,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:49:58,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-01-27 15:49:58,357 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:49:58,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:49:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1592853819, now seen corresponding path program 1 times [2024-01-27 15:49:58,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:49:58,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647071262] [2024-01-27 15:49:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:49:58,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:49:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:49:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:49:58,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:49:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647071262] [2024-01-27 15:49:58,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647071262] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:49:58,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:49:58,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:49:58,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013162716] [2024-01-27 15:49:58,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:49:58,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:49:58,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:49:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:49:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:49:58,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:49:58,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 83 transitions, 679 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:49:58,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:49:58,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:49:58,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:02,158 INFO L124 PetriNetUnfolderBase]: 41892/56157 cut-off events. [2024-01-27 15:50:02,159 INFO L125 PetriNetUnfolderBase]: For 235906/235998 co-relation queries the response was YES. [2024-01-27 15:50:02,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246580 conditions, 56157 events. 41892/56157 cut-off events. For 235906/235998 co-relation queries the response was YES. Maximal size of possible extension queue 2316. Compared 333018 event pairs, 10046 based on Foata normal form. 930/55711 useless extension candidates. Maximal degree in co-relation 104050. Up to 23029 conditions per place. [2024-01-27 15:50:02,528 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 139 selfloop transitions, 27 changer transitions 2/173 dead transitions. [2024-01-27 15:50:02,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 173 transitions, 1667 flow [2024-01-27 15:50:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-27 15:50:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-27 15:50:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-01-27 15:50:02,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-01-27 15:50:02,531 INFO L175 Difference]: Start difference. First operand has 72 places, 83 transitions, 679 flow. Second operand 5 states and 132 transitions. [2024-01-27 15:50:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 173 transitions, 1667 flow [2024-01-27 15:50:02,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 173 transitions, 1631 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:50:02,858 INFO L231 Difference]: Finished difference. Result has 77 places, 91 transitions, 815 flow [2024-01-27 15:50:02,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=77, PETRI_TRANSITIONS=91} [2024-01-27 15:50:02,859 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 30 predicate places. [2024-01-27 15:50:02,859 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 91 transitions, 815 flow [2024-01-27 15:50:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:02,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:02,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:02,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:50:02,859 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:50:02,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash 421252365, now seen corresponding path program 2 times [2024-01-27 15:50:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:02,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123806004] [2024-01-27 15:50:02,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:02,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:50:03,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:03,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123806004] [2024-01-27 15:50:03,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123806004] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:03,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:03,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:50:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935589723] [2024-01-27 15:50:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:50:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:50:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:50:03,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:50:03,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 91 transitions, 815 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 15:50:03,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:03,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:50:03,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:50:07,867 INFO L124 PetriNetUnfolderBase]: 50622/68061 cut-off events. [2024-01-27 15:50:07,868 INFO L125 PetriNetUnfolderBase]: For 329975/330057 co-relation queries the response was YES. [2024-01-27 15:50:08,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310727 conditions, 68061 events. 50622/68061 cut-off events. For 329975/330057 co-relation queries the response was YES. Maximal size of possible extension queue 2876. Compared 417531 event pairs, 10176 based on Foata normal form. 1310/67999 useless extension candidates. Maximal degree in co-relation 180807. Up to 32675 conditions per place. [2024-01-27 15:50:08,340 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 155 selfloop transitions, 36 changer transitions 12/208 dead transitions. [2024-01-27 15:50:08,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 208 transitions, 2037 flow [2024-01-27 15:50:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:50:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:50:08,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-01-27 15:50:08,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146179401993356 [2024-01-27 15:50:08,357 INFO L175 Difference]: Start difference. First operand has 77 places, 91 transitions, 815 flow. Second operand 7 states and 185 transitions. [2024-01-27 15:50:08,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 208 transitions, 2037 flow [2024-01-27 15:50:08,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 208 transitions, 1967 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-27 15:50:08,490 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 1058 flow [2024-01-27 15:50:08,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2024-01-27 15:50:08,491 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 37 predicate places. [2024-01-27 15:50:08,491 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 1058 flow [2024-01-27 15:50:08,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 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 15:50:08,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:50:08,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:50:08,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-01-27 15:50:08,492 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-01-27 15:50:08,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:50:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1791106717, now seen corresponding path program 3 times [2024-01-27 15:50:08,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:50:08,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22891649] [2024-01-27 15:50:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:50:08,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:50:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:50:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:50:08,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:50:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22891649] [2024-01-27 15:50:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22891649] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:50:08,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:50:08,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:50:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174025862] [2024-01-27 15:50:08,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:50:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:50:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:50:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:50:08,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:50:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-01-27 15:50:08,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 1058 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:50:08,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:50:08,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-01-27 15:50:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand