./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.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-figure1-alt.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 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:38:30,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:38:30,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:38:30,651 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:38:30,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:38:30,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:38:30,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:38:30,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:38:30,680 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:38:30,682 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:38:30,683 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:38:30,683 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:38:30,683 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:38:30,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:38:30,684 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:38:30,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:38:30,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:38:30,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:38:30,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:38:30,686 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:38:30,686 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:38:30,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:38:30,686 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:38:30,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:38:30,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:38:30,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:38:30,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:38:30,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:38:30,689 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:38:30,689 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:38:30,689 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:38:30,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c66e95d4d33d89eed9ab2f285249dafeef639a3ca9f6d879b87b944d1b8c0ce [2024-01-27 15:38:30,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:38:30,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:38:30,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:38:30,906 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:38:30,907 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:38:30,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-01-27 15:38:31,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:38:32,121 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:38:32,121 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2024-01-27 15:38:32,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5713a979c/447996a0e5f14957af52f15896e1fba6/FLAGd07f32ea4 [2024-01-27 15:38:32,136 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5713a979c/447996a0e5f14957af52f15896e1fba6 [2024-01-27 15:38:32,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:38:32,139 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:38:32,140 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:38:32,140 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:38:32,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:38:32,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f2dd70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32, skipping insertion in model container [2024-01-27 15:38:32,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,163 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:38:32,319 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-figure1-alt.wvr.c[2113,2126] [2024-01-27 15:38:32,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:38:32,330 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:38:32,352 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-figure1-alt.wvr.c[2113,2126] [2024-01-27 15:38:32,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:38:32,371 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:38:32,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32 WrapperNode [2024-01-27 15:38:32,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:38:32,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:38:32,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:38:32,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:38:32,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,385 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,408 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2024-01-27 15:38:32,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:38:32,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:38:32,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:38:32,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:38:32,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,441 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:38:32,441 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,441 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,444 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,447 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,454 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:38:32,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:38:32,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:38:32,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:38:32,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (1/1) ... [2024-01-27 15:38:32,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:38:32,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:32,522 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 15:38:32,541 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 15:38:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:38:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:38:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:38:32,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:38:32,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:38:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:38:32,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:38:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:38:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:38:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:38:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:38:32,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:38:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:38:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:38:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:38:32,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:38:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:38:32,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:38:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:38:32,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:38:32,567 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 15:38:32,639 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:38:32,640 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:38:32,814 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:38:32,815 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:38:32,960 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:38:32,960 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:38:32,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:38:32 BoogieIcfgContainer [2024-01-27 15:38:32,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:38:32,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:38:32,962 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:38:32,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:38:32,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:38:32" (1/3) ... [2024-01-27 15:38:32,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f6d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:38:32, skipping insertion in model container [2024-01-27 15:38:32,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:38:32" (2/3) ... [2024-01-27 15:38:32,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f6d03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:38:32, skipping insertion in model container [2024-01-27 15:38:32,965 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:38:32" (3/3) ... [2024-01-27 15:38:32,966 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2024-01-27 15:38:32,971 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:38:32,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:38:32,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:38:32,981 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:38:33,022 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:38:33,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2024-01-27 15:38:33,074 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-01-27 15:38:33,075 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:38:33,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-01-27 15:38:33,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2024-01-27 15:38:33,079 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2024-01-27 15:38:33,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:38:33,091 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;@1e5a5260, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:38:33,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:38:33,097 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:38:33,101 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-01-27 15:38:33,101 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:38:33,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:33,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:33,102 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:33,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:33,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1109461626, now seen corresponding path program 1 times [2024-01-27 15:38:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:33,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084379966] [2024-01-27 15:38:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:33,751 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 15:38:33,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:33,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084379966] [2024-01-27 15:38:33,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084379966] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:33,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:33,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047294296] [2024-01-27 15:38:33,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:33,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:33,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:33,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 52 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:33,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:33,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:33,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:33,970 INFO L124 PetriNetUnfolderBase]: 84/187 cut-off events. [2024-01-27 15:38:33,970 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-01-27 15:38:33,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 187 events. 84/187 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 680 event pairs, 24 based on Foata normal form. 9/195 useless extension candidates. Maximal degree in co-relation 289. Up to 101 conditions per place. [2024-01-27 15:38:33,973 INFO L140 encePairwiseOnDemand]: 15/23 looper letters, 34 selfloop transitions, 8 changer transitions 5/50 dead transitions. [2024-01-27 15:38:33,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 50 transitions, 227 flow [2024-01-27 15:38:33,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:33,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-01-27 15:38:33,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-01-27 15:38:33,983 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 52 flow. Second operand 7 states and 84 transitions. [2024-01-27 15:38:33,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 50 transitions, 227 flow [2024-01-27 15:38:33,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:33,987 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 99 flow [2024-01-27 15:38:33,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=99, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2024-01-27 15:38:33,991 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2024-01-27 15:38:33,991 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 99 flow [2024-01-27 15:38:33,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:33,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:33,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:33,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:38:33,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:33,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 209559052, now seen corresponding path program 2 times [2024-01-27 15:38:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:33,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481244110] [2024-01-27 15:38:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:34,177 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 15:38:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:34,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481244110] [2024-01-27 15:38:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481244110] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:34,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332205087] [2024-01-27 15:38:34,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:34,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:34,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:34,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:34,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:34,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 99 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:34,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:34,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:34,309 INFO L124 PetriNetUnfolderBase]: 85/195 cut-off events. [2024-01-27 15:38:34,310 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-01-27 15:38:34,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 195 events. 85/195 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 749 event pairs, 20 based on Foata normal form. 1/196 useless extension candidates. Maximal degree in co-relation 488. Up to 101 conditions per place. [2024-01-27 15:38:34,311 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 8 changer transitions 11/53 dead transitions. [2024-01-27 15:38:34,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 53 transitions, 283 flow [2024-01-27 15:38:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-01-27 15:38:34,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5093167701863354 [2024-01-27 15:38:34,313 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 99 flow. Second operand 7 states and 82 transitions. [2024-01-27 15:38:34,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 53 transitions, 283 flow [2024-01-27 15:38:34,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 279 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:38:34,315 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 133 flow [2024-01-27 15:38:34,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=133, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2024-01-27 15:38:34,316 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-01-27 15:38:34,316 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 133 flow [2024-01-27 15:38:34,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:34,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:38:34,317 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:34,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1557473824, now seen corresponding path program 3 times [2024-01-27 15:38:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:34,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98584964] [2024-01-27 15:38:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:34,486 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 15:38:34,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:34,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98584964] [2024-01-27 15:38:34,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98584964] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:34,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:34,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176066717] [2024-01-27 15:38:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:34,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:34,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:34,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:34,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:34,614 INFO L124 PetriNetUnfolderBase]: 86/190 cut-off events. [2024-01-27 15:38:34,614 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-01-27 15:38:34,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 190 events. 86/190 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 686 event pairs, 16 based on Foata normal form. 1/190 useless extension candidates. Maximal degree in co-relation 569. Up to 105 conditions per place. [2024-01-27 15:38:34,616 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 31 selfloop transitions, 12 changer transitions 5/51 dead transitions. [2024-01-27 15:38:34,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 324 flow [2024-01-27 15:38:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-01-27 15:38:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-01-27 15:38:34,618 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 133 flow. Second operand 7 states and 81 transitions. [2024-01-27 15:38:34,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 324 flow [2024-01-27 15:38:34,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 303 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:34,620 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 196 flow [2024-01-27 15:38:34,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-01-27 15:38:34,620 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2024-01-27 15:38:34,620 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 196 flow [2024-01-27 15:38:34,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:34,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:34,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:38:34,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1096301610, now seen corresponding path program 4 times [2024-01-27 15:38:34,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:34,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147082895] [2024-01-27 15:38:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:34,791 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 15:38:34,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:34,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147082895] [2024-01-27 15:38:34,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147082895] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:34,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:34,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:34,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438056713] [2024-01-27 15:38:34,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:34,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:34,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:34,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:34,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:34,909 INFO L124 PetriNetUnfolderBase]: 84/192 cut-off events. [2024-01-27 15:38:34,909 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2024-01-27 15:38:34,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 192 events. 84/192 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 710 event pairs, 27 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 601. Up to 105 conditions per place. [2024-01-27 15:38:34,911 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 30 selfloop transitions, 14 changer transitions 6/53 dead transitions. [2024-01-27 15:38:34,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 380 flow [2024-01-27 15:38:34,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-01-27 15:38:34,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968944099378882 [2024-01-27 15:38:34,912 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 196 flow. Second operand 7 states and 80 transitions. [2024-01-27 15:38:34,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 380 flow [2024-01-27 15:38:34,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-01-27 15:38:34,914 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 243 flow [2024-01-27 15:38:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2024-01-27 15:38:34,915 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-01-27 15:38:34,915 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 243 flow [2024-01-27 15:38:34,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:34,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:34,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:34,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:38:34,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:34,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -971384504, now seen corresponding path program 5 times [2024-01-27 15:38:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901342779] [2024-01-27 15:38:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:35,109 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 15:38:35,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:35,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901342779] [2024-01-27 15:38:35,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901342779] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:35,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:35,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:35,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336612499] [2024-01-27 15:38:35,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:35,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:35,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:35,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:35,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:35,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:35,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 243 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:35,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:35,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:35,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:35,199 INFO L124 PetriNetUnfolderBase]: 82/187 cut-off events. [2024-01-27 15:38:35,199 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-01-27 15:38:35,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 187 events. 82/187 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 691 event pairs, 24 based on Foata normal form. 1/188 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2024-01-27 15:38:35,202 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 29 selfloop transitions, 13 changer transitions 9/54 dead transitions. [2024-01-27 15:38:35,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 54 transitions, 400 flow [2024-01-27 15:38:35,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:35,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-01-27 15:38:35,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031055900621118 [2024-01-27 15:38:35,204 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 243 flow. Second operand 7 states and 81 transitions. [2024-01-27 15:38:35,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 54 transitions, 400 flow [2024-01-27 15:38:35,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 343 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-01-27 15:38:35,208 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 213 flow [2024-01-27 15:38:35,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2024-01-27 15:38:35,209 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 22 predicate places. [2024-01-27 15:38:35,209 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 213 flow [2024-01-27 15:38:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:35,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:35,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:35,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:38:35,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:35,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1667628514, now seen corresponding path program 6 times [2024-01-27 15:38:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193683132] [2024-01-27 15:38:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:35,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:35,354 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 15:38:35,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:35,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193683132] [2024-01-27 15:38:35,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193683132] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:38:35,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:38:35,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:38:35,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117236300] [2024-01-27 15:38:35,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:38:35,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:38:35,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:38:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:38:35,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 23 [2024-01-27 15:38:35,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 213 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:35,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:35,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 23 [2024-01-27 15:38:35,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:35,443 INFO L124 PetriNetUnfolderBase]: 78/171 cut-off events. [2024-01-27 15:38:35,443 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2024-01-27 15:38:35,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 561 conditions, 171 events. 78/171 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 590 event pairs, 25 based on Foata normal form. 1/171 useless extension candidates. Maximal degree in co-relation 544. Up to 105 conditions per place. [2024-01-27 15:38:35,445 INFO L140 encePairwiseOnDemand]: 16/23 looper letters, 22 selfloop transitions, 13 changer transitions 9/47 dead transitions. [2024-01-27 15:38:35,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 340 flow [2024-01-27 15:38:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-27 15:38:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-27 15:38:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-01-27 15:38:35,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45962732919254656 [2024-01-27 15:38:35,446 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 213 flow. Second operand 7 states and 74 transitions. [2024-01-27 15:38:35,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 340 flow [2024-01-27 15:38:35,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 308 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-01-27 15:38:35,448 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 202 flow [2024-01-27 15:38:35,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2024-01-27 15:38:35,450 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 21 predicate places. [2024-01-27 15:38:35,451 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 202 flow [2024-01-27 15:38:35,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:38:35,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:35,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:35,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:38:35,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:35,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:35,451 INFO L85 PathProgramCache]: Analyzing trace with hash -894668948, now seen corresponding path program 1 times [2024-01-27 15:38:35,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119163526] [2024-01-27 15:38:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:35,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119163526] [2024-01-27 15:38:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119163526] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233404219] [2024-01-27 15:38:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:35,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:35,664 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 15:38:35,692 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 15:38:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:35,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:35,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:35,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:36,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233404219] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:36,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:36,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:38:36,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941430843] [2024-01-27 15:38:36,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:38:36,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:36,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:38:36,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:38:36,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:36,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 202 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:36,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:36,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:36,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:37,050 INFO L124 PetriNetUnfolderBase]: 397/763 cut-off events. [2024-01-27 15:38:37,050 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-01-27 15:38:37,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 763 events. 397/763 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3520 event pairs, 16 based on Foata normal form. 20/783 useless extension candidates. Maximal degree in co-relation 1963. Up to 157 conditions per place. [2024-01-27 15:38:37,054 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 143 selfloop transitions, 78 changer transitions 21/243 dead transitions. [2024-01-27 15:38:37,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 243 transitions, 1317 flow [2024-01-27 15:38:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-01-27 15:38:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-01-27 15:38:37,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 357 transitions. [2024-01-27 15:38:37,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38804347826086955 [2024-01-27 15:38:37,057 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 202 flow. Second operand 40 states and 357 transitions. [2024-01-27 15:38:37,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 243 transitions, 1317 flow [2024-01-27 15:38:37,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 243 transitions, 1265 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-01-27 15:38:37,063 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 615 flow [2024-01-27 15:38:37,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=615, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2024-01-27 15:38:37,063 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 59 predicate places. [2024-01-27 15:38:37,064 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 615 flow [2024-01-27 15:38:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:37,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:37,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:37,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:37,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:37,278 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:37,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash 465028364, now seen corresponding path program 2 times [2024-01-27 15:38:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:37,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495287776] [2024-01-27 15:38:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:37,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:37,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495287776] [2024-01-27 15:38:37,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495287776] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:37,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907558145] [2024-01-27 15:38:37,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:37,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:37,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:38:37,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:37,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:37,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:37,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:37,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907558145] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:37,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:37,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:38:37,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806631213] [2024-01-27 15:38:37,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:37,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:38:37,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:37,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:38:37,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:38:37,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:37,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 615 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:37,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:37,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:37,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:38,654 INFO L124 PetriNetUnfolderBase]: 502/965 cut-off events. [2024-01-27 15:38:38,655 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-01-27 15:38:38,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 965 events. 502/965 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4836 event pairs, 39 based on Foata normal form. 2/967 useless extension candidates. Maximal degree in co-relation 3201. Up to 450 conditions per place. [2024-01-27 15:38:38,661 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 119 selfloop transitions, 119 changer transitions 12/251 dead transitions. [2024-01-27 15:38:38,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 251 transitions, 1746 flow [2024-01-27 15:38:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-01-27 15:38:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-01-27 15:38:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 290 transitions. [2024-01-27 15:38:38,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36024844720496896 [2024-01-27 15:38:38,663 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 615 flow. Second operand 35 states and 290 transitions. [2024-01-27 15:38:38,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 251 transitions, 1746 flow [2024-01-27 15:38:38,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 251 transitions, 1603 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-01-27 15:38:38,674 INFO L231 Difference]: Finished difference. Result has 120 places, 160 transitions, 1172 flow [2024-01-27 15:38:38,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1172, PETRI_PLACES=120, PETRI_TRANSITIONS=160} [2024-01-27 15:38:38,674 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 95 predicate places. [2024-01-27 15:38:38,674 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 160 transitions, 1172 flow [2024-01-27 15:38:38,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:38,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:38,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:38,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:38,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-01-27 15:38:38,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:38,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1449373200, now seen corresponding path program 3 times [2024-01-27 15:38:38,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:38,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822880518] [2024-01-27 15:38:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:38,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:39,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:39,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822880518] [2024-01-27 15:38:39,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822880518] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252266397] [2024-01-27 15:38:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:38:39,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:39,084 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:39,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:38:39,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:38:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:39,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:39,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:39,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:39,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:39,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252266397] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:39,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:39,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:38:39,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869098863] [2024-01-27 15:38:39,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:38:39,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:39,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:38:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:38:39,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:39,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 160 transitions, 1172 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:39,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:39,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:39,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:40,990 INFO L124 PetriNetUnfolderBase]: 794/1531 cut-off events. [2024-01-27 15:38:40,990 INFO L125 PetriNetUnfolderBase]: For 3275/3275 co-relation queries the response was YES. [2024-01-27 15:38:40,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6048 conditions, 1531 events. 794/1531 cut-off events. For 3275/3275 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8662 event pairs, 27 based on Foata normal form. 2/1531 useless extension candidates. Maximal degree in co-relation 6012. Up to 254 conditions per place. [2024-01-27 15:38:40,999 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 203 selfloop transitions, 242 changer transitions 14/460 dead transitions. [2024-01-27 15:38:41,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 460 transitions, 3671 flow [2024-01-27 15:38:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-27 15:38:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-27 15:38:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 532 transitions. [2024-01-27 15:38:41,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36141304347826086 [2024-01-27 15:38:41,003 INFO L175 Difference]: Start difference. First operand has 120 places, 160 transitions, 1172 flow. Second operand 64 states and 532 transitions. [2024-01-27 15:38:41,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 460 transitions, 3671 flow [2024-01-27 15:38:41,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 460 transitions, 3594 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-01-27 15:38:41,033 INFO L231 Difference]: Finished difference. Result has 192 places, 281 transitions, 2692 flow [2024-01-27 15:38:41,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=2692, PETRI_PLACES=192, PETRI_TRANSITIONS=281} [2024-01-27 15:38:41,034 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2024-01-27 15:38:41,034 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 281 transitions, 2692 flow [2024-01-27 15:38:41,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:41,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:41,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:41,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-01-27 15:38:41,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:41,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:41,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:41,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1625138926, now seen corresponding path program 4 times [2024-01-27 15:38:41,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:41,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441837111] [2024-01-27 15:38:41,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:41,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:41,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441837111] [2024-01-27 15:38:41,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441837111] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:41,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678387907] [2024-01-27 15:38:41,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:38:41,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:41,421 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:41,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:38:41,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:38:41,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:41,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:41,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:41,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:41,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678387907] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:41,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:41,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:38:41,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930671533] [2024-01-27 15:38:41,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:41,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:38:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:38:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:38:41,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:41,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 281 transitions, 2692 flow. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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 15:38:41,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:41,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:41,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:43,496 INFO L124 PetriNetUnfolderBase]: 1075/2020 cut-off events. [2024-01-27 15:38:43,497 INFO L125 PetriNetUnfolderBase]: For 16010/16010 co-relation queries the response was YES. [2024-01-27 15:38:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10904 conditions, 2020 events. 1075/2020 cut-off events. For 16010/16010 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11714 event pairs, 30 based on Foata normal form. 2/2018 useless extension candidates. Maximal degree in co-relation 10547. Up to 367 conditions per place. [2024-01-27 15:38:43,513 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 211 selfloop transitions, 335 changer transitions 14/561 dead transitions. [2024-01-27 15:38:43,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 561 transitions, 5834 flow [2024-01-27 15:38:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-01-27 15:38:43,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2024-01-27 15:38:43,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 547 transitions. [2024-01-27 15:38:43,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37160326086956524 [2024-01-27 15:38:43,515 INFO L175 Difference]: Start difference. First operand has 192 places, 281 transitions, 2692 flow. Second operand 64 states and 547 transitions. [2024-01-27 15:38:43,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 561 transitions, 5834 flow [2024-01-27 15:38:43,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 561 transitions, 5514 flow, removed 98 selfloop flow, removed 8 redundant places. [2024-01-27 15:38:43,579 INFO L231 Difference]: Finished difference. Result has 254 places, 384 transitions, 4192 flow [2024-01-27 15:38:43,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=4192, PETRI_PLACES=254, PETRI_TRANSITIONS=384} [2024-01-27 15:38:43,580 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 229 predicate places. [2024-01-27 15:38:43,580 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 384 transitions, 4192 flow [2024-01-27 15:38:43,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 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 15:38:43,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:43,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:43,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:38:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:43,792 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:43,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:43,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1924214320, now seen corresponding path program 5 times [2024-01-27 15:38:43,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:43,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002743741] [2024-01-27 15:38:43,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:43,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:43,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002743741] [2024-01-27 15:38:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002743741] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398691360] [2024-01-27 15:38:43,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:38:43,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:43,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:43,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:43,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:38:44,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:44,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:44,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:44,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:44,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:44,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398691360] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:44,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-01-27 15:38:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665249056] [2024-01-27 15:38:44,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-01-27 15:38:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-01-27 15:38:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-01-27 15:38:44,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:44,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 384 transitions, 4192 flow. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:44,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:44,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:44,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:44,844 INFO L124 PetriNetUnfolderBase]: 1083/2044 cut-off events. [2024-01-27 15:38:44,844 INFO L125 PetriNetUnfolderBase]: For 20265/20265 co-relation queries the response was YES. [2024-01-27 15:38:44,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12456 conditions, 2044 events. 1083/2044 cut-off events. For 20265/20265 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11959 event pairs, 116 based on Foata normal form. 2/2042 useless extension candidates. Maximal degree in co-relation 12078. Up to 1324 conditions per place. [2024-01-27 15:38:44,868 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 181 selfloop transitions, 246 changer transitions 10/438 dead transitions. [2024-01-27 15:38:44,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 438 transitions, 5437 flow [2024-01-27 15:38:44,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:38:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:38:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 151 transitions. [2024-01-27 15:38:44,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34553775743707094 [2024-01-27 15:38:44,873 INFO L175 Difference]: Start difference. First operand has 254 places, 384 transitions, 4192 flow. Second operand 19 states and 151 transitions. [2024-01-27 15:38:44,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 438 transitions, 5437 flow [2024-01-27 15:38:44,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 438 transitions, 5120 flow, removed 71 selfloop flow, removed 22 redundant places. [2024-01-27 15:38:44,954 INFO L231 Difference]: Finished difference. Result has 255 places, 396 transitions, 4880 flow [2024-01-27 15:38:44,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4880, PETRI_PLACES=255, PETRI_TRANSITIONS=396} [2024-01-27 15:38:44,955 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 230 predicate places. [2024-01-27 15:38:44,955 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 396 transitions, 4880 flow [2024-01-27 15:38:44,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 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 15:38:44,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:44,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:44,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:45,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:38:45,167 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:45,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:45,168 INFO L85 PathProgramCache]: Analyzing trace with hash 263968856, now seen corresponding path program 6 times [2024-01-27 15:38:45,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:45,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741835312] [2024-01-27 15:38:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:45,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741835312] [2024-01-27 15:38:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741835312] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777636445] [2024-01-27 15:38:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:38:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:45,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:45,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:38:45,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:38:45,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:45,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:45,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:45,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:45,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:45,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777636445] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:45,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:45,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:45,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262677746] [2024-01-27 15:38:45,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:45,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:45,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:45,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:45,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 396 transitions, 4880 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:45,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:45,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:45,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:46,269 INFO L124 PetriNetUnfolderBase]: 1098/2077 cut-off events. [2024-01-27 15:38:46,270 INFO L125 PetriNetUnfolderBase]: For 17385/17385 co-relation queries the response was YES. [2024-01-27 15:38:46,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13149 conditions, 2077 events. 1098/2077 cut-off events. For 17385/17385 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 12181 event pairs, 130 based on Foata normal form. 2/2079 useless extension candidates. Maximal degree in co-relation 13087. Up to 1380 conditions per place. [2024-01-27 15:38:46,288 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 191 selfloop transitions, 252 changer transitions 10/454 dead transitions. [2024-01-27 15:38:46,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 454 transitions, 6141 flow [2024-01-27 15:38:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-01-27 15:38:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-01-27 15:38:46,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 181 transitions. [2024-01-27 15:38:46,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3278985507246377 [2024-01-27 15:38:46,289 INFO L175 Difference]: Start difference. First operand has 255 places, 396 transitions, 4880 flow. Second operand 24 states and 181 transitions. [2024-01-27 15:38:46,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 454 transitions, 6141 flow [2024-01-27 15:38:46,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 454 transitions, 6073 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-01-27 15:38:46,362 INFO L231 Difference]: Finished difference. Result has 278 places, 407 transitions, 5788 flow [2024-01-27 15:38:46,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5788, PETRI_PLACES=278, PETRI_TRANSITIONS=407} [2024-01-27 15:38:46,363 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 253 predicate places. [2024-01-27 15:38:46,363 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 407 transitions, 5788 flow [2024-01-27 15:38:46,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:46,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:46,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:46,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:38:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:46,574 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:46,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1339680012, now seen corresponding path program 7 times [2024-01-27 15:38:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405216409] [2024-01-27 15:38:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:46,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405216409] [2024-01-27 15:38:46,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405216409] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:46,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557501693] [2024-01-27 15:38:46,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:38:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:46,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:46,704 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:46,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:38:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:46,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:46,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:46,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557501693] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:47,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:47,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814450902] [2024-01-27 15:38:47,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:47,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:47,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:47,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 407 transitions, 5788 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:47,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:47,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:47,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:47,613 INFO L124 PetriNetUnfolderBase]: 1127/2148 cut-off events. [2024-01-27 15:38:47,614 INFO L125 PetriNetUnfolderBase]: For 21387/21387 co-relation queries the response was YES. [2024-01-27 15:38:47,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14734 conditions, 2148 events. 1127/2148 cut-off events. For 21387/21387 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12771 event pairs, 124 based on Foata normal form. 2/2150 useless extension candidates. Maximal degree in co-relation 14667. Up to 1473 conditions per place. [2024-01-27 15:38:47,628 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 195 selfloop transitions, 257 changer transitions 10/463 dead transitions. [2024-01-27 15:38:47,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 463 transitions, 7144 flow [2024-01-27 15:38:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-01-27 15:38:47,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-01-27 15:38:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 162 transitions. [2024-01-27 15:38:47,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33540372670807456 [2024-01-27 15:38:47,630 INFO L175 Difference]: Start difference. First operand has 278 places, 407 transitions, 5788 flow. Second operand 21 states and 162 transitions. [2024-01-27 15:38:47,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 463 transitions, 7144 flow [2024-01-27 15:38:47,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 463 transitions, 7076 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-01-27 15:38:47,724 INFO L231 Difference]: Finished difference. Result has 292 places, 423 transitions, 6956 flow [2024-01-27 15:38:47,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=5720, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6956, PETRI_PLACES=292, PETRI_TRANSITIONS=423} [2024-01-27 15:38:47,725 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2024-01-27 15:38:47,725 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 423 transitions, 6956 flow [2024-01-27 15:38:47,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:47,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:47,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:47,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:38:47,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:47,934 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:47,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1844941450, now seen corresponding path program 8 times [2024-01-27 15:38:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:47,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438590863] [2024-01-27 15:38:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:48,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:48,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438590863] [2024-01-27 15:38:48,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438590863] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:48,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323121422] [2024-01-27 15:38:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:38:48,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:48,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:48,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:48,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:38:48,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:48,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:48,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:48,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:48,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323121422] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:48,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:48,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:48,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131018923] [2024-01-27 15:38:48,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:48,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:48,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:48,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 423 transitions, 6956 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:49,278 INFO L124 PetriNetUnfolderBase]: 1133/2166 cut-off events. [2024-01-27 15:38:49,278 INFO L125 PetriNetUnfolderBase]: For 26162/26162 co-relation queries the response was YES. [2024-01-27 15:38:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16262 conditions, 2166 events. 1133/2166 cut-off events. For 26162/26162 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12967 event pairs, 123 based on Foata normal form. 2/2168 useless extension candidates. Maximal degree in co-relation 16190. Up to 1357 conditions per place. [2024-01-27 15:38:49,303 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 174 selfloop transitions, 293 changer transitions 10/478 dead transitions. [2024-01-27 15:38:49,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 478 transitions, 8257 flow [2024-01-27 15:38:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:38:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:38:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 196 transitions. [2024-01-27 15:38:49,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31561996779388085 [2024-01-27 15:38:49,305 INFO L175 Difference]: Start difference. First operand has 292 places, 423 transitions, 6956 flow. Second operand 27 states and 196 transitions. [2024-01-27 15:38:49,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 478 transitions, 8257 flow [2024-01-27 15:38:49,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 478 transitions, 8148 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-01-27 15:38:49,460 INFO L231 Difference]: Finished difference. Result has 310 places, 433 transitions, 7908 flow [2024-01-27 15:38:49,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7908, PETRI_PLACES=310, PETRI_TRANSITIONS=433} [2024-01-27 15:38:49,461 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2024-01-27 15:38:49,461 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 433 transitions, 7908 flow [2024-01-27 15:38:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:49,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:49,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:49,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:38:49,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:38:49,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:49,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:49,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1304204654, now seen corresponding path program 9 times [2024-01-27 15:38:49,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:49,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263296295] [2024-01-27 15:38:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:49,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:49,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263296295] [2024-01-27 15:38:49,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263296295] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:49,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536627479] [2024-01-27 15:38:49,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:38:49,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:49,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:49,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:49,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:38:49,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:38:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:49,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:49,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:50,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536627479] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:50,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793722386] [2024-01-27 15:38:50,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:50,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:50,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:50,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 433 transitions, 7908 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:50,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:50,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:50,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:51,281 INFO L124 PetriNetUnfolderBase]: 1136/2172 cut-off events. [2024-01-27 15:38:51,282 INFO L125 PetriNetUnfolderBase]: For 32702/32702 co-relation queries the response was YES. [2024-01-27 15:38:51,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17514 conditions, 2172 events. 1136/2172 cut-off events. For 32702/32702 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13018 event pairs, 119 based on Foata normal form. 1/2173 useless extension candidates. Maximal degree in co-relation 17437. Up to 1361 conditions per place. [2024-01-27 15:38:51,322 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 182 selfloop transitions, 290 changer transitions 5/478 dead transitions. [2024-01-27 15:38:51,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 478 transitions, 9102 flow [2024-01-27 15:38:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-01-27 15:38:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-01-27 15:38:51,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 192 transitions. [2024-01-27 15:38:51,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30917874396135264 [2024-01-27 15:38:51,323 INFO L175 Difference]: Start difference. First operand has 310 places, 433 transitions, 7908 flow. Second operand 27 states and 192 transitions. [2024-01-27 15:38:51,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 478 transitions, 9102 flow [2024-01-27 15:38:51,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 478 transitions, 8869 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-01-27 15:38:51,460 INFO L231 Difference]: Finished difference. Result has 322 places, 437 transitions, 8357 flow [2024-01-27 15:38:51,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=7675, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=8357, PETRI_PLACES=322, PETRI_TRANSITIONS=437} [2024-01-27 15:38:51,460 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 297 predicate places. [2024-01-27 15:38:51,461 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 437 transitions, 8357 flow [2024-01-27 15:38:51,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:51,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:51,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:51,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:51,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:38:51,672 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:51,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1674605338, now seen corresponding path program 10 times [2024-01-27 15:38:51,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:51,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725994381] [2024-01-27 15:38:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:51,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:51,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:51,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725994381] [2024-01-27 15:38:51,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725994381] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:51,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211672232] [2024-01-27 15:38:51,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:38:51,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:51,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:51,813 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:51,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:38:51,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:38:51,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:51,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:51,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:52,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:52,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211672232] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:52,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:52,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802415666] [2024-01-27 15:38:52,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:52,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 437 transitions, 8357 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:53,598 INFO L124 PetriNetUnfolderBase]: 1240/2376 cut-off events. [2024-01-27 15:38:53,599 INFO L125 PetriNetUnfolderBase]: For 39190/39190 co-relation queries the response was YES. [2024-01-27 15:38:53,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19768 conditions, 2376 events. 1240/2376 cut-off events. For 39190/39190 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14582 event pairs, 99 based on Foata normal form. 3/2379 useless extension candidates. Maximal degree in co-relation 19690. Up to 1173 conditions per place. [2024-01-27 15:38:53,617 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 205 selfloop transitions, 360 changer transitions 17/583 dead transitions. [2024-01-27 15:38:53,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 583 transitions, 11028 flow [2024-01-27 15:38:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-01-27 15:38:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-01-27 15:38:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 342 transitions. [2024-01-27 15:38:53,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33043478260869563 [2024-01-27 15:38:53,618 INFO L175 Difference]: Start difference. First operand has 322 places, 437 transitions, 8357 flow. Second operand 45 states and 342 transitions. [2024-01-27 15:38:53,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 583 transitions, 11028 flow [2024-01-27 15:38:53,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 583 transitions, 10862 flow, removed 13 selfloop flow, removed 19 redundant places. [2024-01-27 15:38:53,795 INFO L231 Difference]: Finished difference. Result has 360 places, 495 transitions, 10454 flow [2024-01-27 15:38:53,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=8203, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10454, PETRI_PLACES=360, PETRI_TRANSITIONS=495} [2024-01-27 15:38:53,796 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 335 predicate places. [2024-01-27 15:38:53,796 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 495 transitions, 10454 flow [2024-01-27 15:38:53,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:53,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:53,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:53,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:38:54,007 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:54,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:54,007 INFO L85 PathProgramCache]: Analyzing trace with hash -233214576, now seen corresponding path program 11 times [2024-01-27 15:38:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:54,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721027983] [2024-01-27 15:38:54,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:54,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:54,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721027983] [2024-01-27 15:38:54,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721027983] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:54,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225048463] [2024-01-27 15:38:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:38:54,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:54,120 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:54,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:38:54,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:38:54,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:54,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:54,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:54,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:54,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225048463] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:54,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:54,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:54,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494994896] [2024-01-27 15:38:54,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:54,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:54,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:54,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:54,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:54,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:54,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 495 transitions, 10454 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:54,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:54,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:54,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:55,175 INFO L124 PetriNetUnfolderBase]: 1239/2374 cut-off events. [2024-01-27 15:38:55,175 INFO L125 PetriNetUnfolderBase]: For 52051/52051 co-relation queries the response was YES. [2024-01-27 15:38:55,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21921 conditions, 2374 events. 1239/2374 cut-off events. For 52051/52051 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14573 event pairs, 117 based on Foata normal form. 2/2376 useless extension candidates. Maximal degree in co-relation 21830. Up to 1533 conditions per place. [2024-01-27 15:38:55,225 INFO L140 encePairwiseOnDemand]: 12/23 looper letters, 237 selfloop transitions, 285 changer transitions 10/533 dead transitions. [2024-01-27 15:38:55,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 533 transitions, 11817 flow [2024-01-27 15:38:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:38:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:38:55,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-01-27 15:38:55,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318077803203661 [2024-01-27 15:38:55,228 INFO L175 Difference]: Start difference. First operand has 360 places, 495 transitions, 10454 flow. Second operand 19 states and 145 transitions. [2024-01-27 15:38:55,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 533 transitions, 11817 flow [2024-01-27 15:38:55,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 533 transitions, 11544 flow, removed 119 selfloop flow, removed 13 redundant places. [2024-01-27 15:38:55,537 INFO L231 Difference]: Finished difference. Result has 368 places, 499 transitions, 11220 flow [2024-01-27 15:38:55,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=11220, PETRI_PLACES=368, PETRI_TRANSITIONS=499} [2024-01-27 15:38:55,538 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 343 predicate places. [2024-01-27 15:38:55,538 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 499 transitions, 11220 flow [2024-01-27 15:38:55,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:55,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:55,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:55,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:38:55,745 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:55,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash 54441996, now seen corresponding path program 12 times [2024-01-27 15:38:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597988429] [2024-01-27 15:38:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:55,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597988429] [2024-01-27 15:38:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597988429] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077561430] [2024-01-27 15:38:55,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:38:55,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:55,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:55,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:55,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:38:56,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-27 15:38:56,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:38:56,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:56,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:56,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:56,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:56,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077561430] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:56,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872607237] [2024-01-27 15:38:56,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:56,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:56,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:56,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:56,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:56,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 499 transitions, 11220 flow. Second operand has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:56,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:56,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:56,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:38:58,332 INFO L124 PetriNetUnfolderBase]: 1354/2605 cut-off events. [2024-01-27 15:38:58,332 INFO L125 PetriNetUnfolderBase]: For 62626/62626 co-relation queries the response was YES. [2024-01-27 15:38:58,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24554 conditions, 2605 events. 1354/2605 cut-off events. For 62626/62626 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16459 event pairs, 89 based on Foata normal form. 3/2608 useless extension candidates. Maximal degree in co-relation 24461. Up to 996 conditions per place. [2024-01-27 15:38:58,358 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 221 selfloop transitions, 455 changer transitions 18/695 dead transitions. [2024-01-27 15:38:58,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 695 transitions, 14761 flow [2024-01-27 15:38:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-01-27 15:38:58,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-01-27 15:38:58,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 484 transitions. [2024-01-27 15:38:58,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33402346445824704 [2024-01-27 15:38:58,360 INFO L175 Difference]: Start difference. First operand has 368 places, 499 transitions, 11220 flow. Second operand 63 states and 484 transitions. [2024-01-27 15:38:58,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 695 transitions, 14761 flow [2024-01-27 15:38:58,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 695 transitions, 14495 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-01-27 15:38:58,675 INFO L231 Difference]: Finished difference. Result has 424 places, 573 transitions, 13783 flow [2024-01-27 15:38:58,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=10964, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=13783, PETRI_PLACES=424, PETRI_TRANSITIONS=573} [2024-01-27 15:38:58,697 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 399 predicate places. [2024-01-27 15:38:58,697 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 573 transitions, 13783 flow [2024-01-27 15:38:58,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.76) internal successors, (119), 25 states have internal predecessors, (119), 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 15:38:58,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:38:58,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:38:58,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:38:58,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:38:58,898 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:38:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:38:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash 230207722, now seen corresponding path program 13 times [2024-01-27 15:38:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:38:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193257974] [2024-01-27 15:38:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:38:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:38:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:38:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193257974] [2024-01-27 15:38:59,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193257974] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:38:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933005773] [2024-01-27 15:38:59,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:38:59,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:38:59,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:38:59,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:38:59,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:38:59,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:38:59,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2024-01-27 15:38:59,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:38:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:59,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:38:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:38:59,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933005773] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:38:59,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:38:59,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-01-27 15:38:59,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119710867] [2024-01-27 15:38:59,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:38:59,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:38:59,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:38:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:38:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:38:59,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:38:59,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 573 transitions, 13783 flow. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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 15:38:59,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:38:59,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:38:59,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:01,091 INFO L124 PetriNetUnfolderBase]: 1603/3030 cut-off events. [2024-01-27 15:39:01,091 INFO L125 PetriNetUnfolderBase]: For 79334/79334 co-relation queries the response was YES. [2024-01-27 15:39:01,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30596 conditions, 3030 events. 1603/3030 cut-off events. For 79334/79334 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19392 event pairs, 97 based on Foata normal form. 4/3034 useless extension candidates. Maximal degree in co-relation 30373. Up to 1089 conditions per place. [2024-01-27 15:39:01,126 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 292 selfloop transitions, 498 changer transitions 20/811 dead transitions. [2024-01-27 15:39:01,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 811 transitions, 19004 flow [2024-01-27 15:39:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-27 15:39:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-27 15:39:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 434 transitions. [2024-01-27 15:39:01,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362876254180602 [2024-01-27 15:39:01,140 INFO L175 Difference]: Start difference. First operand has 424 places, 573 transitions, 13783 flow. Second operand 52 states and 434 transitions. [2024-01-27 15:39:01,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 811 transitions, 19004 flow [2024-01-27 15:39:01,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 811 transitions, 17935 flow, removed 402 selfloop flow, removed 31 redundant places. [2024-01-27 15:39:01,708 INFO L231 Difference]: Finished difference. Result has 451 places, 676 transitions, 17036 flow [2024-01-27 15:39:01,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=13001, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=17036, PETRI_PLACES=451, PETRI_TRANSITIONS=676} [2024-01-27 15:39:01,710 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 426 predicate places. [2024-01-27 15:39:01,710 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 676 transitions, 17036 flow [2024-01-27 15:39:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 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 15:39:01,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:01,710 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:01,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-01-27 15:39:01,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:01,922 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:01,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:01,922 INFO L85 PathProgramCache]: Analyzing trace with hash -271064938, now seen corresponding path program 14 times [2024-01-27 15:39:01,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524052191] [2024-01-27 15:39:01,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:01,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:02,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524052191] [2024-01-27 15:39:02,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524052191] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:02,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863673586] [2024-01-27 15:39:02,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:39:02,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:02,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:02,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:39:02,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:39:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:02,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:39:02,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:02,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:02,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863673586] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:02,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:02,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:39:02,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346663382] [2024-01-27 15:39:02,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:02,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:39:02,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:39:02,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:39:02,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:02,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 676 transitions, 17036 flow. Second operand has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 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 15:39:02,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:02,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:02,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:08,100 INFO L124 PetriNetUnfolderBase]: 3654/6796 cut-off events. [2024-01-27 15:39:08,101 INFO L125 PetriNetUnfolderBase]: For 185181/185181 co-relation queries the response was YES. [2024-01-27 15:39:08,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70293 conditions, 6796 events. 3654/6796 cut-off events. For 185181/185181 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 48826 event pairs, 125 based on Foata normal form. 107/6903 useless extension candidates. Maximal degree in co-relation 69868. Up to 1737 conditions per place. [2024-01-27 15:39:08,283 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 591 selfloop transitions, 1202 changer transitions 47/1841 dead transitions. [2024-01-27 15:39:08,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1841 transitions, 44741 flow [2024-01-27 15:39:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-01-27 15:39:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2024-01-27 15:39:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 1157 transitions. [2024-01-27 15:39:08,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754055807916937 [2024-01-27 15:39:08,287 INFO L175 Difference]: Start difference. First operand has 451 places, 676 transitions, 17036 flow. Second operand 134 states and 1157 transitions. [2024-01-27 15:39:08,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1841 transitions, 44741 flow [2024-01-27 15:39:09,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1841 transitions, 43293 flow, removed 476 selfloop flow, removed 22 redundant places. [2024-01-27 15:39:09,902 INFO L231 Difference]: Finished difference. Result has 605 places, 1426 transitions, 39968 flow [2024-01-27 15:39:09,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=16421, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=541, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=39968, PETRI_PLACES=605, PETRI_TRANSITIONS=1426} [2024-01-27 15:39:09,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 580 predicate places. [2024-01-27 15:39:09,904 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1426 transitions, 39968 flow [2024-01-27 15:39:09,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.774193548387097) internal successors, (148), 31 states have internal predecessors, (148), 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 15:39:09,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:09,904 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] [2024-01-27 15:39:09,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:10,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:10,116 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:10,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1073343025, now seen corresponding path program 1 times [2024-01-27 15:39:10,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:10,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422131014] [2024-01-27 15:39:10,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:10,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422131014] [2024-01-27 15:39:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422131014] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784433070] [2024-01-27 15:39:10,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:10,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:10,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:10,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:10,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-27 15:39:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:10,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:39:10,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784433070] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-27 15:39:10,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075313509] [2024-01-27 15:39:10,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:10,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:39:10,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:39:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:39:10,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:10,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1426 transitions, 39968 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 15:39:10,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:10,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:10,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:14,474 INFO L124 PetriNetUnfolderBase]: 3609/6665 cut-off events. [2024-01-27 15:39:14,474 INFO L125 PetriNetUnfolderBase]: For 261655/261655 co-relation queries the response was YES. [2024-01-27 15:39:14,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77922 conditions, 6665 events. 3609/6665 cut-off events. For 261655/261655 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 47354 event pairs, 142 based on Foata normal form. 2/6667 useless extension candidates. Maximal degree in co-relation 77756. Up to 3245 conditions per place. [2024-01-27 15:39:14,569 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 645 selfloop transitions, 884 changer transitions 35/1565 dead transitions. [2024-01-27 15:39:14,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 644 places, 1565 transitions, 44511 flow [2024-01-27 15:39:14,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-01-27 15:39:14,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-01-27 15:39:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 387 transitions. [2024-01-27 15:39:14,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657844990548204 [2024-01-27 15:39:14,572 INFO L175 Difference]: Start difference. First operand has 605 places, 1426 transitions, 39968 flow. Second operand 46 states and 387 transitions. [2024-01-27 15:39:14,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 644 places, 1565 transitions, 44511 flow [2024-01-27 15:39:17,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1565 transitions, 42957 flow, removed 651 selfloop flow, removed 24 redundant places. [2024-01-27 15:39:17,285 INFO L231 Difference]: Finished difference. Result has 626 places, 1426 transitions, 40310 flow [2024-01-27 15:39:17,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=38450, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=879, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=40310, PETRI_PLACES=626, PETRI_TRANSITIONS=1426} [2024-01-27 15:39:17,287 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 601 predicate places. [2024-01-27 15:39:17,287 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 1426 transitions, 40310 flow [2024-01-27 15:39:17,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 15:39:17,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:17,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:17,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-01-27 15:39:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:17,498 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash 81110808, now seen corresponding path program 15 times [2024-01-27 15:39:17,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:17,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162146014] [2024-01-27 15:39:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:17,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:17,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162146014] [2024-01-27 15:39:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162146014] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:17,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689227945] [2024-01-27 15:39:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:39:17,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:17,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:17,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-27 15:39:17,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:39:17,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:17,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:39:17,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:17,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:17,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:18,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689227945] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:18,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:39:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237299513] [2024-01-27 15:39:18,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:18,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:39:18,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:39:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:39:18,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:18,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 1426 transitions, 40310 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:39:18,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:18,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:26,690 INFO L124 PetriNetUnfolderBase]: 4703/8573 cut-off events. [2024-01-27 15:39:26,691 INFO L125 PetriNetUnfolderBase]: For 366972/366972 co-relation queries the response was YES. [2024-01-27 15:39:26,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103342 conditions, 8573 events. 4703/8573 cut-off events. For 366972/366972 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 62722 event pairs, 171 based on Foata normal form. 9/8582 useless extension candidates. Maximal degree in co-relation 103101. Up to 2376 conditions per place. [2024-01-27 15:39:26,827 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 674 selfloop transitions, 1531 changer transitions 37/2243 dead transitions. [2024-01-27 15:39:26,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 2243 transitions, 62397 flow [2024-01-27 15:39:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2024-01-27 15:39:26,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2024-01-27 15:39:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 1261 transitions. [2024-01-27 15:39:26,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34700055035773253 [2024-01-27 15:39:26,830 INFO L175 Difference]: Start difference. First operand has 626 places, 1426 transitions, 40310 flow. Second operand 158 states and 1261 transitions. [2024-01-27 15:39:26,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 2243 transitions, 62397 flow [2024-01-27 15:39:30,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 2243 transitions, 60930 flow, removed 136 selfloop flow, removed 37 redundant places. [2024-01-27 15:39:30,953 INFO L231 Difference]: Finished difference. Result has 763 places, 1848 transitions, 56893 flow [2024-01-27 15:39:30,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=39232, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=56893, PETRI_PLACES=763, PETRI_TRANSITIONS=1848} [2024-01-27 15:39:30,954 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 738 predicate places. [2024-01-27 15:39:30,955 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 1848 transitions, 56893 flow [2024-01-27 15:39:30,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:39:30,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:30,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:30,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-27 15:39:31,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-01-27 15:39:31,166 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:31,167 INFO L85 PathProgramCache]: Analyzing trace with hash 257788086, now seen corresponding path program 16 times [2024-01-27 15:39:31,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:31,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279483928] [2024-01-27 15:39:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:31,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:31,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:31,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279483928] [2024-01-27 15:39:31,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279483928] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:31,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994041546] [2024-01-27 15:39:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:39:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:31,372 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:31,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-27 15:39:31,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:39:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:31,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:39:31,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:31,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:31,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994041546] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:31,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:31,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:39:31,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206038119] [2024-01-27 15:39:31,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:39:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:39:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:39:31,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 1848 transitions, 56893 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:39:31,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:31,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:38,270 INFO L124 PetriNetUnfolderBase]: 5171/9400 cut-off events. [2024-01-27 15:39:38,271 INFO L125 PetriNetUnfolderBase]: For 490510/490510 co-relation queries the response was YES. [2024-01-27 15:39:38,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122356 conditions, 9400 events. 5171/9400 cut-off events. For 490510/490510 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 69887 event pairs, 296 based on Foata normal form. 3/9403 useless extension candidates. Maximal degree in co-relation 122183. Up to 5294 conditions per place. [2024-01-27 15:39:38,449 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 834 selfloop transitions, 1366 changer transitions 15/2216 dead transitions. [2024-01-27 15:39:38,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 2216 transitions, 70251 flow [2024-01-27 15:39:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-01-27 15:39:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-01-27 15:39:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 526 transitions. [2024-01-27 15:39:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3314429741650914 [2024-01-27 15:39:38,451 INFO L175 Difference]: Start difference. First operand has 763 places, 1848 transitions, 56893 flow. Second operand 69 states and 526 transitions. [2024-01-27 15:39:38,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 2216 transitions, 70251 flow [2024-01-27 15:39:44,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 773 places, 2216 transitions, 68655 flow, removed 404 selfloop flow, removed 52 redundant places. [2024-01-27 15:39:45,007 INFO L231 Difference]: Finished difference. Result has 787 places, 2050 transitions, 65994 flow [2024-01-27 15:39:45,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=55517, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=65994, PETRI_PLACES=787, PETRI_TRANSITIONS=2050} [2024-01-27 15:39:45,009 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 762 predicate places. [2024-01-27 15:39:45,009 INFO L495 AbstractCegarLoop]: Abstraction has has 787 places, 2050 transitions, 65994 flow [2024-01-27 15:39:45,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:39:45,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:39:45,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:39:45,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-27 15:39:45,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:45,221 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:39:45,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:39:45,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1848996034, now seen corresponding path program 17 times [2024-01-27 15:39:45,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:39:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802054445] [2024-01-27 15:39:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:39:45,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:39:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:39:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:45,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:39:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802054445] [2024-01-27 15:39:45,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802054445] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:39:45,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989478346] [2024-01-27 15:39:45,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:39:45,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:39:45,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:39:45,363 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:39:45,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-27 15:39:45,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-01-27 15:39:45,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:39:45,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:39:45,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:39:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:45,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:39:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:39:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989478346] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:39:45,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:39:45,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:39:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654807656] [2024-01-27 15:39:45,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:39:45,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:39:45,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:39:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:39:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:39:45,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:39:45,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 2050 transitions, 65994 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:39:45,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:39:45,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:39:45,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:39:53,282 INFO L124 PetriNetUnfolderBase]: 5322/9686 cut-off events. [2024-01-27 15:39:53,283 INFO L125 PetriNetUnfolderBase]: For 528330/528330 co-relation queries the response was YES. [2024-01-27 15:39:53,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129971 conditions, 9686 events. 5322/9686 cut-off events. For 528330/528330 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 72522 event pairs, 300 based on Foata normal form. 3/9689 useless extension candidates. Maximal degree in co-relation 129790. Up to 5304 conditions per place. [2024-01-27 15:39:53,440 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 804 selfloop transitions, 1468 changer transitions 15/2288 dead transitions. [2024-01-27 15:39:53,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 866 places, 2288 transitions, 74774 flow [2024-01-27 15:39:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-01-27 15:39:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2024-01-27 15:39:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 623 transitions. [2024-01-27 15:39:53,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32634887375589317 [2024-01-27 15:39:53,442 INFO L175 Difference]: Start difference. First operand has 787 places, 2050 transitions, 65994 flow. Second operand 83 states and 623 transitions. [2024-01-27 15:39:53,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 866 places, 2288 transitions, 74774 flow [2024-01-27 15:40:00,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2288 transitions, 74659 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-01-27 15:40:00,921 INFO L231 Difference]: Finished difference. Result has 861 places, 2119 transitions, 72880 flow [2024-01-27 15:40:00,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=65887, PETRI_DIFFERENCE_MINUEND_PLACES=769, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=72880, PETRI_PLACES=861, PETRI_TRANSITIONS=2119} [2024-01-27 15:40:00,923 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 836 predicate places. [2024-01-27 15:40:00,923 INFO L495 AbstractCegarLoop]: Abstraction has has 861 places, 2119 transitions, 72880 flow [2024-01-27 15:40:00,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:40:00,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:00,924 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:00,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:01,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:01,137 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:01,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash -773284878, now seen corresponding path program 18 times [2024-01-27 15:40:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:01,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031726177] [2024-01-27 15:40:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:01,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:01,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031726177] [2024-01-27 15:40:01,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031726177] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:01,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396494035] [2024-01-27 15:40:01,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:40:01,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:01,288 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:01,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-27 15:40:01,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-01-27 15:40:01,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:01,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:40:01,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:01,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396494035] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:01,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:40:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293706335] [2024-01-27 15:40:01,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:01,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:40:01,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:01,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:40:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:40:01,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:40:01,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 861 places, 2119 transitions, 72880 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:40:01,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:01,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:40:01,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:08,963 INFO L124 PetriNetUnfolderBase]: 5330/9710 cut-off events. [2024-01-27 15:40:08,963 INFO L125 PetriNetUnfolderBase]: For 575688/575688 co-relation queries the response was YES. [2024-01-27 15:40:09,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136232 conditions, 9710 events. 5330/9710 cut-off events. For 575688/575688 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 72764 event pairs, 317 based on Foata normal form. 3/9713 useless extension candidates. Maximal degree in co-relation 136044. Up to 5481 conditions per place. [2024-01-27 15:40:09,140 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 776 selfloop transitions, 1484 changer transitions 15/2276 dead transitions. [2024-01-27 15:40:09,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 932 places, 2276 transitions, 79195 flow [2024-01-27 15:40:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-27 15:40:09,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-27 15:40:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 560 transitions. [2024-01-27 15:40:09,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32463768115942027 [2024-01-27 15:40:09,147 INFO L175 Difference]: Start difference. First operand has 861 places, 2119 transitions, 72880 flow. Second operand 75 states and 560 transitions. [2024-01-27 15:40:09,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 932 places, 2276 transitions, 79195 flow [2024-01-27 15:40:15,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 898 places, 2276 transitions, 78033 flow, removed 51 selfloop flow, removed 34 redundant places. [2024-01-27 15:40:15,723 INFO L231 Difference]: Finished difference. Result has 904 places, 2127 transitions, 76284 flow [2024-01-27 15:40:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=71722, PETRI_DIFFERENCE_MINUEND_PLACES=824, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=76284, PETRI_PLACES=904, PETRI_TRANSITIONS=2127} [2024-01-27 15:40:15,725 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 879 predicate places. [2024-01-27 15:40:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 904 places, 2127 transitions, 76284 flow [2024-01-27 15:40:15,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:40:15,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:15,726 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] [2024-01-27 15:40:15,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:15,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:15,937 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:15,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1023289845, now seen corresponding path program 2 times [2024-01-27 15:40:15,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:15,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794846971] [2024-01-27 15:40:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:16,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794846971] [2024-01-27 15:40:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794846971] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:16,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109820372] [2024-01-27 15:40:16,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:40:16,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:16,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:16,125 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:16,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-27 15:40:16,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:40:16,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:40:16,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:40:16,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:16,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109820372] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:16,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:16,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-27 15:40:16,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227618034] [2024-01-27 15:40:16,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:16,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:40:16,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:16,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:40:16,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:40:16,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:40:16,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 904 places, 2127 transitions, 76284 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 15:40:16,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:16,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:40:16,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:24,789 INFO L124 PetriNetUnfolderBase]: 6429/11711 cut-off events. [2024-01-27 15:40:24,789 INFO L125 PetriNetUnfolderBase]: For 774077/774077 co-relation queries the response was YES. [2024-01-27 15:40:24,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168216 conditions, 11711 events. 6429/11711 cut-off events. For 774077/774077 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 90942 event pairs, 226 based on Foata normal form. 92/11803 useless extension candidates. Maximal degree in co-relation 168031. Up to 4431 conditions per place. [2024-01-27 15:40:25,045 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 733 selfloop transitions, 2103 changer transitions 43/2880 dead transitions. [2024-01-27 15:40:25,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 985 places, 2880 transitions, 102909 flow [2024-01-27 15:40:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-01-27 15:40:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-01-27 15:40:25,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 659 transitions. [2024-01-27 15:40:25,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3370843989769821 [2024-01-27 15:40:25,047 INFO L175 Difference]: Start difference. First operand has 904 places, 2127 transitions, 76284 flow. Second operand 85 states and 659 transitions. [2024-01-27 15:40:25,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 985 places, 2880 transitions, 102909 flow [2024-01-27 15:40:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 937 places, 2880 transitions, 101770 flow, removed 27 selfloop flow, removed 48 redundant places. [2024-01-27 15:40:36,625 INFO L231 Difference]: Finished difference. Result has 963 places, 2657 transitions, 99976 flow [2024-01-27 15:40:36,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=75390, PETRI_DIFFERENCE_MINUEND_PLACES=853, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1600, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=99976, PETRI_PLACES=963, PETRI_TRANSITIONS=2657} [2024-01-27 15:40:36,628 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 938 predicate places. [2024-01-27 15:40:36,628 INFO L495 AbstractCegarLoop]: Abstraction has has 963 places, 2657 transitions, 99976 flow [2024-01-27 15:40:36,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 15:40:36,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:40:36,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:40:36,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-27 15:40:36,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-01-27 15:40:36,839 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:40:36,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:40:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash -532838730, now seen corresponding path program 19 times [2024-01-27 15:40:36,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:40:36,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913834339] [2024-01-27 15:40:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:40:36,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:40:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:37,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:40:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913834339] [2024-01-27 15:40:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913834339] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:40:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966603937] [2024-01-27 15:40:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:40:37,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:40:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:40:37,033 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:40:37,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-27 15:40:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:40:37,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:40:37,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:40:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:37,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:40:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:40:37,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966603937] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:40:37,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:40:37,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:40:37,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046536750] [2024-01-27 15:40:37,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:40:37,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:40:37,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:40:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:40:37,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:40:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:40:37,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 2657 transitions, 99976 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:40:37,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:40:37,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:40:37,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:40:54,704 INFO L124 PetriNetUnfolderBase]: 8644/15627 cut-off events. [2024-01-27 15:40:54,705 INFO L125 PetriNetUnfolderBase]: For 1283767/1283767 co-relation queries the response was YES. [2024-01-27 15:40:55,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245992 conditions, 15627 events. 8644/15627 cut-off events. For 1283767/1283767 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 127455 event pairs, 319 based on Foata normal form. 10/15637 useless extension candidates. Maximal degree in co-relation 245464. Up to 5492 conditions per place. [2024-01-27 15:40:55,118 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1069 selfloop transitions, 2837 changer transitions 35/3942 dead transitions. [2024-01-27 15:40:55,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 3942 transitions, 151932 flow [2024-01-27 15:40:55,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-01-27 15:40:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2024-01-27 15:40:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 989 transitions. [2024-01-27 15:40:55,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3282442748091603 [2024-01-27 15:40:55,121 INFO L175 Difference]: Start difference. First operand has 963 places, 2657 transitions, 99976 flow. Second operand 131 states and 989 transitions. [2024-01-27 15:40:55,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 3942 transitions, 151932 flow [2024-01-27 15:41:19,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1066 places, 3942 transitions, 148855 flow, removed 809 selfloop flow, removed 23 redundant places. [2024-01-27 15:41:19,152 INFO L231 Difference]: Finished difference. Result has 1111 places, 3636 transitions, 147485 flow [2024-01-27 15:41:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=97972, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1910, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=147485, PETRI_PLACES=1111, PETRI_TRANSITIONS=3636} [2024-01-27 15:41:19,155 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1086 predicate places. [2024-01-27 15:41:19,155 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 3636 transitions, 147485 flow [2024-01-27 15:41:19,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:41:19,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:41:19,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:41:19,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-01-27 15:41:19,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-01-27 15:41:19,367 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:41:19,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:41:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1390742660, now seen corresponding path program 20 times [2024-01-27 15:41:19,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:41:19,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664593897] [2024-01-27 15:41:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:41:19,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:41:19,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:41:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:19,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:41:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664593897] [2024-01-27 15:41:19,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664593897] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:41:19,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18485194] [2024-01-27 15:41:19,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:41:19,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:41:19,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:41:19,544 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:41:19,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-01-27 15:41:19,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:41:19,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:41:19,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:41:19,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:41:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:19,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:41:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:41:20,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18485194] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:41:20,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:41:20,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:41:20,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832671873] [2024-01-27 15:41:20,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:41:20,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:41:20,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:41:20,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:41:20,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:41:20,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:41:20,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 3636 transitions, 147485 flow. Second operand has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 15:41:20,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:41:20,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:41:20,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:41:51,588 INFO L124 PetriNetUnfolderBase]: 11868/21375 cut-off events. [2024-01-27 15:41:51,588 INFO L125 PetriNetUnfolderBase]: For 1975268/1975268 co-relation queries the response was YES. [2024-01-27 15:41:52,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354148 conditions, 21375 events. 11868/21375 cut-off events. For 1975268/1975268 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 181454 event pairs, 261 based on Foata normal form. 5/21380 useless extension candidates. Maximal degree in co-relation 353891. Up to 6259 conditions per place. [2024-01-27 15:41:52,984 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1206 selfloop transitions, 4012 changer transitions 16/5235 dead transitions. [2024-01-27 15:41:52,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1244 places, 5235 transitions, 213399 flow [2024-01-27 15:41:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-01-27 15:41:52,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2024-01-27 15:41:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 1159 transitions. [2024-01-27 15:41:53,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651543793320731 [2024-01-27 15:41:53,014 INFO L175 Difference]: Start difference. First operand has 1111 places, 3636 transitions, 147485 flow. Second operand 138 states and 1159 transitions. [2024-01-27 15:41:53,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1244 places, 5235 transitions, 213399 flow [2024-01-27 15:42:37,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1216 places, 5235 transitions, 211890 flow, removed 556 selfloop flow, removed 28 redundant places. [2024-01-27 15:42:37,806 INFO L231 Difference]: Finished difference. Result has 1266 places, 4847 transitions, 208379 flow [2024-01-27 15:42:37,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=146315, PETRI_DIFFERENCE_MINUEND_PLACES=1079, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2841, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=208379, PETRI_PLACES=1266, PETRI_TRANSITIONS=4847} [2024-01-27 15:42:37,814 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1241 predicate places. [2024-01-27 15:42:37,814 INFO L495 AbstractCegarLoop]: Abstraction has has 1266 places, 4847 transitions, 208379 flow [2024-01-27 15:42:37,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.741935483870968) internal successors, (147), 31 states have internal predecessors, (147), 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 15:42:37,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:42:37,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:42:37,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-01-27 15:42:38,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-01-27 15:42:38,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:42:38,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:42:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1196208604, now seen corresponding path program 21 times [2024-01-27 15:42:38,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:42:38,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606524286] [2024-01-27 15:42:38,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:42:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:42:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:42:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:38,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:42:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606524286] [2024-01-27 15:42:38,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606524286] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:42:38,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793533725] [2024-01-27 15:42:38,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:42:38,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:42:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:42:38,182 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:42:38,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-01-27 15:42:38,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:42:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:42:38,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:42:38,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:42:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:38,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:42:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:42:38,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793533725] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:42:38,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:42:38,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-01-27 15:42:38,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85628898] [2024-01-27 15:42:38,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:42:38,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:42:38,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:42:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:42:38,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:42:38,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:42:38,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1266 places, 4847 transitions, 208379 flow. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:42:38,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:42:38,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:42:38,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:43:24,985 INFO L124 PetriNetUnfolderBase]: 12369/22352 cut-off events. [2024-01-27 15:43:24,985 INFO L125 PetriNetUnfolderBase]: For 2310679/2310679 co-relation queries the response was YES. [2024-01-27 15:43:25,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391919 conditions, 22352 events. 12369/22352 cut-off events. For 2310679/2310679 co-relation queries the response was YES. Maximal size of possible extension queue 1302. Compared 191852 event pairs, 325 based on Foata normal form. 5/22357 useless extension candidates. Maximal degree in co-relation 391630. Up to 6515 conditions per place. [2024-01-27 15:43:25,681 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 1220 selfloop transitions, 4156 changer transitions 19/5396 dead transitions. [2024-01-27 15:43:25,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1418 places, 5396 transitions, 232800 flow [2024-01-27 15:43:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2024-01-27 15:43:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2024-01-27 15:43:25,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 1219 transitions. [2024-01-27 15:43:25,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33974358974358976 [2024-01-27 15:43:25,692 INFO L175 Difference]: Start difference. First operand has 1266 places, 4847 transitions, 208379 flow. Second operand 156 states and 1219 transitions. [2024-01-27 15:43:25,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1418 places, 5396 transitions, 232800 flow [2024-01-27 15:44:36,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1377 places, 5396 transitions, 230990 flow, removed 726 selfloop flow, removed 41 redundant places. [2024-01-27 15:44:36,976 INFO L231 Difference]: Finished difference. Result has 1398 places, 5077 transitions, 227582 flow [2024-01-27 15:44:36,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=206823, PETRI_DIFFERENCE_MINUEND_PLACES=1222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=156, PETRI_FLOW=227582, PETRI_PLACES=1398, PETRI_TRANSITIONS=5077} [2024-01-27 15:44:36,980 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1373 predicate places. [2024-01-27 15:44:36,980 INFO L495 AbstractCegarLoop]: Abstraction has has 1398 places, 5077 transitions, 227582 flow [2024-01-27 15:44:36,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 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 15:44:36,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:44:36,980 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] [2024-01-27 15:44:36,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-01-27 15:44:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:44:37,192 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:44:37,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:44:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1566210251, now seen corresponding path program 3 times [2024-01-27 15:44:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:44:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011883772] [2024-01-27 15:44:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:44:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:44:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:44:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:37,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:44:37,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011883772] [2024-01-27 15:44:37,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011883772] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:44:37,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954549496] [2024-01-27 15:44:37,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:44:37,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:44:37,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:44:37,361 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:44:37,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-01-27 15:44:37,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:44:37,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:44:37,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:44:37,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:44:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:37,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:44:37,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:44:37,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954549496] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:44:37,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:44:37,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-27 15:44:37,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236973390] [2024-01-27 15:44:37,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:44:37,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:44:37,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:44:37,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:44:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:44:37,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:44:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1398 places, 5077 transitions, 227582 flow. Second operand has 30 states, 30 states have (on average 4.4) internal successors, (132), 30 states have internal predecessors, (132), 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 15:44:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:44:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:44:37,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:45:23,494 INFO L124 PetriNetUnfolderBase]: 12398/22502 cut-off events. [2024-01-27 15:45:23,495 INFO L125 PetriNetUnfolderBase]: For 2665339/2665339 co-relation queries the response was YES. [2024-01-27 15:45:24,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410204 conditions, 22502 events. 12398/22502 cut-off events. For 2665339/2665339 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 194592 event pairs, 519 based on Foata normal form. 91/22593 useless extension candidates. Maximal degree in co-relation 409861. Up to 8801 conditions per place. [2024-01-27 15:45:24,970 INFO L140 encePairwiseOnDemand]: 11/23 looper letters, 2987 selfloop transitions, 2373 changer transitions 30/5391 dead transitions. [2024-01-27 15:45:24,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1464 places, 5391 transitions, 248135 flow [2024-01-27 15:45:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-01-27 15:45:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-01-27 15:45:24,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 562 transitions. [2024-01-27 15:45:24,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3490683229813665 [2024-01-27 15:45:24,973 INFO L175 Difference]: Start difference. First operand has 1398 places, 5077 transitions, 227582 flow. Second operand 70 states and 562 transitions. [2024-01-27 15:45:24,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1464 places, 5391 transitions, 248135 flow [2024-01-27 15:46:44,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1390 places, 5391 transitions, 246462 flow, removed 301 selfloop flow, removed 74 redundant places. [2024-01-27 15:46:44,693 INFO L231 Difference]: Finished difference. Result has 1406 places, 5190 transitions, 240214 flow [2024-01-27 15:46:44,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=224643, PETRI_DIFFERENCE_MINUEND_PLACES=1321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=240214, PETRI_PLACES=1406, PETRI_TRANSITIONS=5190} [2024-01-27 15:46:44,707 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1381 predicate places. [2024-01-27 15:46:44,707 INFO L495 AbstractCegarLoop]: Abstraction has has 1406 places, 5190 transitions, 240214 flow [2024-01-27 15:46:44,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.4) internal successors, (132), 30 states have internal predecessors, (132), 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 15:46:44,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:46:44,707 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] [2024-01-27 15:46:44,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-01-27 15:46:44,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:44,918 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:46:44,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:46:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 566996759, now seen corresponding path program 4 times [2024-01-27 15:46:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:46:44,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379012967] [2024-01-27 15:46:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:46:44,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:46:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:46:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:46:45,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379012967] [2024-01-27 15:46:45,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379012967] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:46:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544498689] [2024-01-27 15:46:45,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:46:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:46:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:46:45,087 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:46:45,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-01-27 15:46:45,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:46:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:46:45,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:46:45,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:46:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:45,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:46:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:46:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544498689] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:46:45,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:46:45,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-27 15:46:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996883898] [2024-01-27 15:46:45,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:46:45,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:46:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:46:45,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:46:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:46:45,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:46:45,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1406 places, 5190 transitions, 240214 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 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 15:46:45,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:46:45,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:46:45,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:47:24,954 INFO L124 PetriNetUnfolderBase]: 12509/22799 cut-off events. [2024-01-27 15:47:24,955 INFO L125 PetriNetUnfolderBase]: For 2975709/2975709 co-relation queries the response was YES. [2024-01-27 15:47:25,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433114 conditions, 22799 events. 12509/22799 cut-off events. For 2975709/2975709 co-relation queries the response was YES. Maximal size of possible extension queue 1367. Compared 198331 event pairs, 543 based on Foata normal form. 5/22804 useless extension candidates. Maximal degree in co-relation 432420. Up to 13279 conditions per place. [2024-01-27 15:47:25,915 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1861 selfloop transitions, 3583 changer transitions 30/5475 dead transitions. [2024-01-27 15:47:25,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1470 places, 5475 transitions, 262233 flow [2024-01-27 15:47:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-01-27 15:47:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-01-27 15:47:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 538 transitions. [2024-01-27 15:47:25,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3390044108380592 [2024-01-27 15:47:25,917 INFO L175 Difference]: Start difference. First operand has 1406 places, 5190 transitions, 240214 flow. Second operand 69 states and 538 transitions. [2024-01-27 15:47:25,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1470 places, 5475 transitions, 262233 flow [2024-01-27 15:48:56,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1439 places, 5475 transitions, 260622 flow, removed 411 selfloop flow, removed 31 redundant places. [2024-01-27 15:48:56,701 INFO L231 Difference]: Finished difference. Result has 1448 places, 5319 transitions, 256497 flow [2024-01-27 15:48:56,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=238922, PETRI_DIFFERENCE_MINUEND_PLACES=1371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=256497, PETRI_PLACES=1448, PETRI_TRANSITIONS=5319} [2024-01-27 15:48:56,705 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1423 predicate places. [2024-01-27 15:48:56,705 INFO L495 AbstractCegarLoop]: Abstraction has has 1448 places, 5319 transitions, 256497 flow [2024-01-27 15:48:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:56,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:48:56,706 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] [2024-01-27 15:48:56,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-01-27 15:48:56,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-01-27 15:48:56,917 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:48:56,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:48:56,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1030631303, now seen corresponding path program 5 times [2024-01-27 15:48:56,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:48:56,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791963544] [2024-01-27 15:48:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:48:56,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:48:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:48:57,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:57,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:48:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791963544] [2024-01-27 15:48:57,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791963544] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:48:57,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485294889] [2024-01-27 15:48:57,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:48:57,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:48:57,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:48:57,104 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:48:57,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-01-27 15:48:57,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:48:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:48:57,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2024-01-27 15:48:57,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:48:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:57,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:48:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:48:57,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485294889] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:48:57,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:48:57,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2024-01-27 15:48:57,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984415210] [2024-01-27 15:48:57,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:48:57,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:48:57,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:48:57,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:48:57,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:48:57,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 23 [2024-01-27 15:48:57,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1448 places, 5319 transitions, 256497 flow. Second operand has 30 states, 30 states have (on average 4.433333333333334) internal successors, (133), 30 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:48:57,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:48:57,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 23 [2024-01-27 15:48:57,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:49:51,771 INFO L124 PetriNetUnfolderBase]: 12857/23384 cut-off events. [2024-01-27 15:49:51,772 INFO L125 PetriNetUnfolderBase]: For 3189999/3189999 co-relation queries the response was YES. [2024-01-27 15:49:52,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453685 conditions, 23384 events. 12857/23384 cut-off events. For 3189999/3189999 co-relation queries the response was YES. Maximal size of possible extension queue 1374. Compared 203505 event pairs, 482 based on Foata normal form. 2/23386 useless extension candidates. Maximal degree in co-relation 453334. Up to 9159 conditions per place. [2024-01-27 15:49:52,575 INFO L140 encePairwiseOnDemand]: 10/23 looper letters, 1362 selfloop transitions, 4528 changer transitions 14/5905 dead transitions. [2024-01-27 15:49:52,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1553 places, 5905 transitions, 284814 flow [2024-01-27 15:49:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2024-01-27 15:49:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2024-01-27 15:49:52,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 818 transitions. [2024-01-27 15:49:52,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3147364370911889 [2024-01-27 15:49:52,577 INFO L175 Difference]: Start difference. First operand has 1448 places, 5319 transitions, 256497 flow. Second operand 113 states and 818 transitions. [2024-01-27 15:49:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1553 places, 5905 transitions, 284814 flow